İlbilge ÖZSU - Academia.edu (original) (raw)

Papers by İlbilge ÖZSU

Research paper thumbnail of Comparing the Effectiveness of Whole Body Vibration and Local Vibration Exercise on Counter-Movement Jump Performance and Its Residual Characteristics in Well-Trained Athletes

Uluslararası spor egzersiz ve antrenman bilimi dergisi, Mar 15, 2017

Aim: This study aimed to compare the effectiveness of whole body vibration (WBV) and local vibrat... more Aim: This study aimed to compare the effectiveness of whole body vibration (WBV) and local vibration (LV) exercise on counter-movement jump performance (CMJ) and its residual characteristics in well-trained athletes. Material and Methods: Thirty-two male athletes (age: 22.3±3.2 years) visited the laboratory twice, 48 hours apart, and performed WBV and LV in two sessions of equal duration. Each test day had two parts (sham [0 Hz, 0 mm] and vibration treatment [50 Hz, 4 mm]), 20 min apart. LV or WBV were applied for 6×15 sec with 1 min passive rest between repetitions. During the LV, participants were asked to lie supine (2×15 sec) and then lie laterally (2×2×15 sec) such that the quadriceps muscles connected to the WBV device. WBV was applied in the squatting position at 135º knee angle. After each session, the participants were tested for CMJ for 8 min at the 1 st , 2 nd , 3 rd , 4 th ,6 th , and 8 th min. Results: The results of two-factor repeated measures ANOVA test revealed that both WBV (p = 0.27; n p 2 = 0.04) and LV (p = 0.57; n p 2 = 0.03) and their sham conditions decreased CMJ height to a similar extent. Further, there was no statistically significant difference between WBV and LV at any measurement time point (p>0.05). Conclusion: WBV and LV were not effective methods to enhance the CMJ performance of well-trained athletes. However, WBV platform can be safely used as LV exercise equipment since no adverse effect was observed. Combat athletes Vertical sinusoidal vibration Explosive strength Lower body Article Info

Research paper thumbnail of Biomechanical structure of sprint start and effect of biological feedback methods on sprint start performance

DergiPark (Istanbul University), Jun 5, 2014

One of the profound factors that affect sprint performance of athletes is the transfer of the pos... more One of the profound factors that affect sprint performance of athletes is the transfer of the possible highest propulsive force onto the starting blocks using an ideal sprint start body position. Hence, in the literature, there are a great deal of studies related to assessment and improvement of sprint start performance. In this review, evaluation of the literature based on improving the sprint start performance and sharing obtained instructions with sport scientists, trainers and athletes were aimed. According to the literature knowledge, it is stated that higher propulsive force onto the starting block and acceleration are two most important factors affecting on the results of sprint running. Also, it is rational to state that permanent kinesthetic awareness of individualized sprint start position could lead to significant improvements in sprint performances. For this reason, biofeedback trainings will be useful methods that provide a kinesthetic awareness of individualized sprint start position for athletes. Thus, athletes increase the probability of learning motor skill when they have opportunity to compare the actual motor performance output with expected ideal performance output. It is stated that motor skill acquisition level of athletes increases considerably if feedback is provided appropriately. Accordingly, the aim of this review is to present literature based knowledge about biomechanics of sprint start and effects of biological feedback methods on sprint start performance.

Research paper thumbnail of Comparison of the Effect of Passive and Active Recovery, and Self-Myofascial Release Exercises on Lactate Removal and Total Quality of Recovery

Journal of education and training studies, Aug 3, 2018

Recovery from exercise-induced fatigue is crucial for subsequent performance. Self-myofascial rel... more Recovery from exercise-induced fatigue is crucial for subsequent performance. Self-myofascial release (SMR) using a foam roller is an alternative to active recovery (AR). This study aims to compare the effects of passive recovery (PR), AR, and SMR on blood lactate [La-] removal and total quality of recovery (TQR). Twenty-two well trained male athletes (age: 22.6±2.9 years) underwent three testing sessions conducted 72 hours apart but at the same time of each day in a randomized order. After determining resting [La-] and heart rate (HR), the subjects completed a Wingate anaerobic test (WAnT), triggering muscular fatigue. HR and [La-] were measured three minutes after the WAnT, following which the subjects underwent one of the three different recovery interventions over 15 minutes: PR (lying supine), AR (cycling at 40% of the estimated maximum HR of the respective subject), and SMR (using foam roller on lower extremity muscles). After each recovery intervention, [La-], HR, and TQR were measured. There was no statistically significant difference in [La-] and HR values obtained before the WAnT test (p=0.368, p=0.691, respectively) and right after the WAnT test (0.264, p=0.629) Both AR and SMR were more effective than PR for [La-] removal and obtaining a higher TQR (p<0.001). However, SMR and AR were not superior to one another for blood [La-] removal (p>0.05). In contrast, a significantly higher TQR was observed with SMR than AR and PR (p<0.001). Athletes can apply AR or SMR to recover from strenuous exercise. SMR can be an alternative to PR and AR as a recovery tool.

Research paper thumbnail of Residual effects of static stretching and self-myofascial-release exercises on flexibility and lower body explosive strength in well-trained combat athletes

Isokinetics and Exercise Science, May 22, 2017

Duration of static stretching is the most crucial factor associated with static stretchinduced im... more Duration of static stretching is the most crucial factor associated with static stretchinduced impairments in explosive muscular performances. The aim of this study was to investigate the acute residual effects of lower body short (S-SS) and long duration static stretching protocols (L-SS) on counter movement jump (CMJ) performances in skilled female combat athletes. Twelve well-trained female combat athletes (training experience: 11.5 ∓ 3.6 years) performed S-SS (6 min of total stretch duration) and L-SS (12 min of total stretch duration) separated by 48 hours in a randomized, balanced order. After each protocol, participants performed, respectively, counter movement jump with arm swing (CMJAS) and with hands on hip (CMJHH) separated by 30-second rest interval at the 15th second and 1st, 5th, 10th, 15th, and 20th minute of the 20-minute recovery period. An insignificant interaction effect was found for Protocol × Time in CMJ heights (p = 0.722) indicating that both S-SS and L-SS reduced CMJ heights to a similar extent over the course of 20 min recovery period. S-SS and L-SS led to a mean CMJ height reduction of 6.29% (p < 0.05, d = 0.603) and 6.74% (p < 0.05, d = 0.610), respectively. Greater than 50% of participants experienced a reduction in CMJAS height exceeding minimum detectable change score with 90% confidence at each time point during the recovery period without exception. Use of static stretching protocols

Research paper thumbnail of The effect of static and dynamic core exercises on dynamic balance, spinal stability, and hip mobility in female office workers

Turkish journal of physical medicine and rehabilitation, Sep 9, 2020

This paper was presented partially as an oral presentation on the 16

Research paper thumbnail of Effects of 6-Week Resistance Elastic Band Exercise on Functional Performances of 8-9 Year-Old Children

Journal of education and training studies, Dec 17, 2018

The purpose of this study was to investigate the effects of 6-week exercises performed by elastic... more The purpose of this study was to investigate the effects of 6-week exercises performed by elastic resistance band on functional performance (balance, agility, hand grip strength and flexibility) in children aged 8-9 years. So, 102 students participated in this study according to pre-test and post-test design. Participants were divided into two groups: experimental group (n=50, height: 134.0 ± 6.3 cm, mass: 30.9 ± 7.9 kg, age: 8.6 ± 0.5 years) and control group (n=52, height: 135.0 ± 6.2 cm, mass: 32.4 ± 5.9 kg, age: 8.6 ± 0.6 years). The experimental group performed exercises using elastic resistance bands of lightness grade at the same time of day (45 minutes/day, 3 days/week), and the control group did not participate in any physical activity. Balance was measured by Flamingo Test, agility by Ilinois, flexibility by sit and reach box and strength was measured by hand-grip dynamometer. It was determined that 6-week exercises performed by elastic resistance band increased significantly the hand grip strength; however there was no statistically significant effect on balance, agility and flexibility abilities. The inclusion of elastic resistance band exercises in the context of school activity programs can improve children's strengths. For this reason, exercises performed by elastic resistance bands for more than 6 weeks can be added to activity programs in school as an economical, fun and reliable way to improve the hand-grip performance of children.

Research paper thumbnail of Avoiding Systematic Errors in Isometric Squat-Related Studies without Pre-Familiarization by Using Sufficient Numbers of Trials

Journal of Human Kinetics, Oct 1, 2014

There is no scientific evidence in the literature indicating that maximal isometric strength meas... more There is no scientific evidence in the literature indicating that maximal isometric strength measures can be assessed within 3 trials. We questioned whether the results of isometric squat-related studies in which maximal isometric squat strength (MISS) testing was performed using limited numbers of trials without pre-familiarization might have included systematic errors, especially those resulting from acute learning effects. Forty resistance-trained male participants performed 8 isometric squat trials without pre-familiarization. The highest measures in the first "n" trials (3 ≤ n ≤ 8) of these 8 squats were regarded as MISS obtained using 6 different MISS test methods featuring different numbers of trials (The Best of n Trials Method [BnT]). When B3T and B8T were paired with other methods, high reliability was found between the paired methods in terms of intraclass correlation coefficients (0.93-0.98) and coefficients of variation (3.4-7.0%). The Wilcoxon's signed rank test indicated that MISS obtained using B3T and B8T were lower (p < 0.001) and higher (p < 0.001), respectively, than those obtained using other methods. The Bland-Altman method revealed a lack of agreement between any of the paired methods. Simulation studies illustrated that increasing the number of trials to 9-10 using a relatively large sample size (i.e., ≥ 24) could be an effective means of obtaining the actual MISS values of the participants. The common use of a limited number of trials in MISS tests without pre-familiarization appears to have no solid scientific base. Our findings suggest that the number of trials should be increased in commonly used MISS tests to avoid learning effect-related systematic errors.

Research paper thumbnail of Farklı spor branşlarında tüm vücut vibrasyonunun kassal aktivasyon üzerine etkisinin incelenmesi

Bu çalışmanın amacı farklı spor branşlarındaki sporcuların statik ve dinamik hareketler sırasında... more Bu çalışmanın amacı farklı spor branşlarındaki sporcuların statik ve dinamik hareketler sırasında farklı frekans ve genlik değerlerindeki Tüm Vücut Vibrasyon (TVV) uyaranında verdikleri kassal aktivasyon yanıtlarını yüzeyel Elektromiyografi (sEMG) ile araştırmaktır. Bir kulübe bağlı, lisanlı olarak futbol, basketbol ve yüzme branşlarında yarışan toplam 20 katılımcı (7 futbolcu, 7 basketbolcu, 6 yüzücü) ile gerçekleştirilen çalışmada, katılımcıların 30 saniye TVV uygulaması altında iken statik ve dinamik skuat sırasında tibialis anterior, gastrocnemius medialis, vastus medialis, rectus femoris, vastus lateralis ve biceps femoris kaslarının sEMG ile aktiviteleri ölçüldü. Katılımcıların 5 dakika dinlenme aralıkları ile TVV öncesinde ve TVV sırasında gerçekleştirdikleri statik ve dinamik skuat sırasında kaydedilen sEMG'ye ait RMS (root mean square) değerleri TVV uygulamaları öncesinde elde edilen MİK (maksimal istemli kasılma) değerlerine göre belirlendi. Elde edilen veriler 3 2 7 (...

Research paper thumbnail of A Method for Measuring Vertical Jump Height by Using Long Exposed Photographs

Research paper thumbnail of Studies of Thermoluminescence Properties of Mersin's Quartz Sand with X-ray Irradiation

The quartz samples collected from quartz sand deposits from Yeşilovacık Mersin region were studie... more The quartz samples collected from quartz sand deposits from Yeşilovacık Mersin region were studied Thermoluminescence (TL) from room temperature to 400 o C after irradiated by X-ray source. Thermoluminescence trap parameters were calculated via Various Heating Rate (VHR) method. Heating rates were selected as 0.5 o C/s, 1 o C/s, 2 o C/s, 5 o C/s, 10 o C/s. The peak maximum temperature shift values from TL glow curve at 90 o C, 210 o C and 320 o C were monitored by VHR method. The temperature shift along to heating rates were used to calculate the trap parameters as Activation Energy (E) and Frequency Factor (s). The activation and frequency factor values were obtained as 0.84eV, 2.84x10 10 s -1 , 1.13eV, 2.34x10 13 s -1 and 1.78eV, 1.59x10 18 s -1 at selected peaks.

Research paper thumbnail of Mersin Kuvars Kumunun X-Işinlari ile Termoluminesans Özelliklerinin Çalişilmasi

The quartz samples collected from quartz sand deposits from Yesilovacik Mersin region were studie... more The quartz samples collected from quartz sand deposits from Yesilovacik Mersin region were studied Thermoluminescence (TL) from room temperature to 400oC after irradiated by X-ray source. Thermoluminescence trap parameters were calculated via Various Heating Rate (VHR) method. Heating rates were selected as 0.5oC/s, 1oC/s, 2oC/s, 5oC/s, 10oC/s. The peak maximum temperature shift values from TL glow curve at 90oC, 210oC and 320oC were monitored by VHR method. The temperature shift along to heating rates were used to calculate the trap parameters as Activation Energy (E) and Frequency Factor (s). The activation and frequency factor values were obtained as 0.84eV, 2.84x1010 s-1, 1.13eV, 2.34x1013 s-1 and 1.78eV, 1.59x1018s-1 at selected peaks

Research paper thumbnail of Acute Residual Effects of Short and Long Duration Static Stretching on Counter Movement Jump Performances in Well-Trained Female Combat Athletes

European Journal of Physical Education and Sport Science, 2016

Duration of static stretching is the most crucial factor associated with static stretch-induced i... more Duration of static stretching is the most crucial factor associated with static stretch-induced impairments in explosive muscular performances. The aim of this study was to investigate the acute residual effects of lower body short (S-SS) and long duration static stretching protocols (L-SS) on counter movement jump (CMJ) performances in skilled female combat athletes. Twelve well-trained female combat athletes (training experience: 11.5 ∓ 3.6 years) performed S-SS (6 min of total stretch duration) and L-SS (12 min of total stretch duration) separated by 48 hours in a randomized, balanced order. After each protocol, participants performed, respectively, counter movement jump with arm swing (CMJ AS ) and with hands on hip (CMJ HH ) separated by 30-second rest interval at the 15th second and 1st, 5th, 10th, 15th, and 20th minute of the 20-minute recovery period. An insignificant interaction effect was found for Protocol × Time in CMJ heights (p = 0.722) indicating that both S-SS and L-...

Research paper thumbnail of The effect of static and dynamic core exercises on dynamic balance, spinal stability, and hip mobility in female office workers

Turkish Journal of Physical Medicine and Rehabilitation, 2020

This paper was presented partially as an oral presentation on the 16

Research paper thumbnail of The Effects of Whole Body Vibration Treatments on Lower Body Muscular Activity in Well-Trained Athletes from Different Sports Branches

Journal of Education and Training Studies, 2018

A limited number of acute whole body vibration (WBV) studies have investigated the effects of WBV... more A limited number of acute whole body vibration (WBV) studies have investigated the effects of WBV treatments which were applied with different vibration frequencies and amplitude combinations on lower extremity muscle activation of well-trained athletes from different sports branches. To compare the effects of WBV on lower extremity muscle activation via Surface Electromyography (sEMG) of well-trained athletes from different sports branches (soccer, basketball and swimming) during static and dynamic squat exercises. sEMG activities of Tibialis Anterior (TA), Gastrocnemius Medialis (GM), Vastus Medialis (VM), Rectus Femoris (RF), Vastus Lateralis (VL) and Biceps Femoris (BF) muscles of 7 male soccer players, 7 male basketball players, and 6 male swimmers were recorded during WBV applied in static squat and dynamic squat positions with different frequencies (30-35-40 Hz) and amplitude (2-4 mm) combinations separated from each other by 5 min passive rest periods. Each combination was a...

Research paper thumbnail of Comparison of the Effect of Passive and Active Recovery, and Self-Myofascial Release Exercises on Lactate Removal and Total Quality of Recovery

Journal of Education and Training Studies, 2018

Recovery from exercise-induced fatigue is crucial for subsequent performance. Self-myofascial rel... more Recovery from exercise-induced fatigue is crucial for subsequent performance. Self-myofascial release (SMR) using a foam roller is an alternative to active recovery (AR). This study aims to compare the effects of passive recovery (PR), AR, and SMR on blood lactate [La-] removal and total quality of recovery (TQR). Twenty-two well trained male athletes (age: 22.6±2.9 years) underwent three testing sessions conducted 72 hours apart but at the same time of each day in a randomized order. After determining resting [La-] and heart rate (HR), the subjects completed a Wingate anaerobic test (WAnT), triggering muscular fatigue. HR and [La-] were measured threeminutes after the WAnT, following which the subjects underwent one of the three different recovery interventions over 15 minutes: PR (lying supine), AR (cycling at 40% of the estimated maximum HR of the respective subject), and SMR (using foam roller on lower extremity muscles). After each recovery intervention, [La-], HR, and TQR were...

Research paper thumbnail of The Effects of 12 Weeks Pilates Exercises on Functional and Cognitive Performance in Elderly People

Journal of Education and Training Studies, 2019

The aim of the study was to investigate the effects of 12 weeks Pilates exercises on functional a... more The aim of the study was to investigate the effects of 12 weeks Pilates exercises on functional and cognitive performance in elderly people which are living in an elderly care center. Forty three elderly were randomly allocated either to Pilates group (PG, n= 21; mean age, 72.8 ± 7.84 years), which performed three session of Pilates per week for 12 weeks, or to control group (CG, n= 22; mean age, 77.7 ± 7.25 years), which no performed any exercise is except from daily works. Participants tested to handgrip strength, Berg balance scale, Functional reach test and Mini Mental State Examination Test before and after the 12 weeks of exercise. Finally, PG demonstrated improvement in all variables. However, CG has no improvement any variables. Pilates exercises led to significant improvement in functional and cognitive performance. Therefore, elderly people can apply a well-structured Pilates exercise program under Pilates instructor and physiotherapist.

Research paper thumbnail of Myofascial Training Paradigm

International Journal of Sport, Exercise & Training Sciences, 2018

Fitness Trendleri Araştırmasına göre Self-Myofasyal Release (SMR) egzersizleri, son 3 yılın fitne... more Fitness Trendleri Araştırmasına göre Self-Myofasyal Release (SMR) egzersizleri, son 3 yılın fitness trendleri arasında, ilk yirmi'de yer almaktadır. SMR egzersizleri antrenör ve sporcular tarafından sıklıkla tercih edilmesine rağmen, SMR egzersizlerinin sporcu performansı üzerindeki sonuçları çelişkilidir. Bu derlemede, SMR egzersizlerinin sporcu performansı üzerindeki etkilerinin araştırılması amaçlandı.

Research paper thumbnail of Effects of 6-Week Resistance Elastic Band Exercise on Functional Performances of 8-9 Year-Old Children

Journal of Education and Training Studies, 2018

The purpose of this study was to investigate the effects of 6-week exercises performed by elastic... more The purpose of this study was to investigate the effects of 6-week exercises performed by elastic resistance band on functional performance (balance, agility, hand grip strength and flexibility) in children aged 8-9 years. So, 102 students participated in this study according to pre-test and post-test design. Participants were divided into two groups: experimental group (n=50, height: 134.0 ± 6.3 cm, mass: 30.9 ± 7.9 kg, age: 8.6 ± 0.5 years) and control group (n=52, height: 135.0 ± 6.2 cm, mass: 32.4 ± 5.9 kg, age: 8.6 ± 0.6 years). The experimental group performed exercises using elastic resistance bands of lightness grade at the same time of day (45 minutes/day, 3 days/week), and the control group did not participate in any physical activity. Balance was measured by Flamingo Test, agility by Ilinois, flexibility by sit and reach box and strength was measured by hand-grip dynamometer. It was determined that 6-week exercises performed by elastic resistance band increased significan...

Research paper thumbnail of Comparing the Effectiveness of Whole Body Vibration and Local Vibration Exercise on Counter-Movement Jump Performance and Its Residual Characteristics in Well-Trained Athletes

International Journal of Sports Exercise and Training Sciences, 2017

Aim: This study aimed to compare the effectiveness of whole body vibration (WBV) and local vibrat... more Aim: This study aimed to compare the effectiveness of whole body vibration (WBV) and local vibration (LV) exercise on counter-movement jump performance (CMJ) and its residual characteristics in well-trained athletes. Material and Methods: Thirty-two male athletes (age: 22.3±3.2 years) visited the laboratory twice, 48 hours apart, and performed WBV and LV in two sessions of equal duration. Each test day had two parts (sham [0 Hz, 0 mm] and vibration treatment [50 Hz, 4 mm]), 20 min apart. LV or WBV were applied for 6×15 sec with 1 min passive rest between repetitions. During the LV, participants were asked to lie supine (2×15 sec) and then lie laterally (2×2×15 sec) such that the quadriceps muscles connected to the WBV device. WBV was applied in the squatting position at 135º knee angle. After each session, the participants were tested for CMJ for 8 min at the 1 st , 2 nd , 3 rd , 4 th ,6 th , and 8 th min. Results: The results of two-factor repeated measures ANOVA test revealed that both WBV (p = 0.27; n p 2 = 0.04) and LV (p = 0.57; n p 2 = 0.03) and their sham conditions decreased CMJ height to a similar extent. Further, there was no statistically significant difference between WBV and LV at any measurement time point (p>0.05). Conclusion: WBV and LV were not effective methods to enhance the CMJ performance of well-trained athletes. However, WBV platform can be safely used as LV exercise equipment since no adverse effect was observed. Combat athletes Vertical sinusoidal vibration Explosive strength Lower body Article Info

Research paper thumbnail of Residual effects of static stretching and self-myofascial-release exercises on flexibility and lower body explosive strength in well-trained combat athletes

Isokinetics and Exercise Science, 2017

Duration of static stretching is the most crucial factor associated with static stretchinduced im... more Duration of static stretching is the most crucial factor associated with static stretchinduced impairments in explosive muscular performances. The aim of this study was to investigate the acute residual effects of lower body short (S-SS) and long duration static stretching protocols (L-SS) on counter movement jump (CMJ) performances in skilled female combat athletes. Twelve well-trained female combat athletes (training experience: 11.5 ∓ 3.6 years) performed S-SS (6 min of total stretch duration) and L-SS (12 min of total stretch duration) separated by 48 hours in a randomized, balanced order. After each protocol, participants performed, respectively, counter movement jump with arm swing (CMJAS) and with hands on hip (CMJHH) separated by 30-second rest interval at the 15th second and 1st, 5th, 10th, 15th, and 20th minute of the 20-minute recovery period. An insignificant interaction effect was found for Protocol × Time in CMJ heights (p = 0.722) indicating that both S-SS and L-SS reduced CMJ heights to a similar extent over the course of 20 min recovery period. S-SS and L-SS led to a mean CMJ height reduction of 6.29% (p < 0.05, d = 0.603) and 6.74% (p < 0.05, d = 0.610), respectively. Greater than 50% of participants experienced a reduction in CMJAS height exceeding minimum detectable change score with 90% confidence at each time point during the recovery period without exception. Use of static stretching protocols

Research paper thumbnail of Comparing the Effectiveness of Whole Body Vibration and Local Vibration Exercise on Counter-Movement Jump Performance and Its Residual Characteristics in Well-Trained Athletes

Uluslararası spor egzersiz ve antrenman bilimi dergisi, Mar 15, 2017

Aim: This study aimed to compare the effectiveness of whole body vibration (WBV) and local vibrat... more Aim: This study aimed to compare the effectiveness of whole body vibration (WBV) and local vibration (LV) exercise on counter-movement jump performance (CMJ) and its residual characteristics in well-trained athletes. Material and Methods: Thirty-two male athletes (age: 22.3±3.2 years) visited the laboratory twice, 48 hours apart, and performed WBV and LV in two sessions of equal duration. Each test day had two parts (sham [0 Hz, 0 mm] and vibration treatment [50 Hz, 4 mm]), 20 min apart. LV or WBV were applied for 6×15 sec with 1 min passive rest between repetitions. During the LV, participants were asked to lie supine (2×15 sec) and then lie laterally (2×2×15 sec) such that the quadriceps muscles connected to the WBV device. WBV was applied in the squatting position at 135º knee angle. After each session, the participants were tested for CMJ for 8 min at the 1 st , 2 nd , 3 rd , 4 th ,6 th , and 8 th min. Results: The results of two-factor repeated measures ANOVA test revealed that both WBV (p = 0.27; n p 2 = 0.04) and LV (p = 0.57; n p 2 = 0.03) and their sham conditions decreased CMJ height to a similar extent. Further, there was no statistically significant difference between WBV and LV at any measurement time point (p>0.05). Conclusion: WBV and LV were not effective methods to enhance the CMJ performance of well-trained athletes. However, WBV platform can be safely used as LV exercise equipment since no adverse effect was observed. Combat athletes Vertical sinusoidal vibration Explosive strength Lower body Article Info

Research paper thumbnail of Biomechanical structure of sprint start and effect of biological feedback methods on sprint start performance

DergiPark (Istanbul University), Jun 5, 2014

One of the profound factors that affect sprint performance of athletes is the transfer of the pos... more One of the profound factors that affect sprint performance of athletes is the transfer of the possible highest propulsive force onto the starting blocks using an ideal sprint start body position. Hence, in the literature, there are a great deal of studies related to assessment and improvement of sprint start performance. In this review, evaluation of the literature based on improving the sprint start performance and sharing obtained instructions with sport scientists, trainers and athletes were aimed. According to the literature knowledge, it is stated that higher propulsive force onto the starting block and acceleration are two most important factors affecting on the results of sprint running. Also, it is rational to state that permanent kinesthetic awareness of individualized sprint start position could lead to significant improvements in sprint performances. For this reason, biofeedback trainings will be useful methods that provide a kinesthetic awareness of individualized sprint start position for athletes. Thus, athletes increase the probability of learning motor skill when they have opportunity to compare the actual motor performance output with expected ideal performance output. It is stated that motor skill acquisition level of athletes increases considerably if feedback is provided appropriately. Accordingly, the aim of this review is to present literature based knowledge about biomechanics of sprint start and effects of biological feedback methods on sprint start performance.

Research paper thumbnail of Comparison of the Effect of Passive and Active Recovery, and Self-Myofascial Release Exercises on Lactate Removal and Total Quality of Recovery

Journal of education and training studies, Aug 3, 2018

Recovery from exercise-induced fatigue is crucial for subsequent performance. Self-myofascial rel... more Recovery from exercise-induced fatigue is crucial for subsequent performance. Self-myofascial release (SMR) using a foam roller is an alternative to active recovery (AR). This study aims to compare the effects of passive recovery (PR), AR, and SMR on blood lactate [La-] removal and total quality of recovery (TQR). Twenty-two well trained male athletes (age: 22.6±2.9 years) underwent three testing sessions conducted 72 hours apart but at the same time of each day in a randomized order. After determining resting [La-] and heart rate (HR), the subjects completed a Wingate anaerobic test (WAnT), triggering muscular fatigue. HR and [La-] were measured three minutes after the WAnT, following which the subjects underwent one of the three different recovery interventions over 15 minutes: PR (lying supine), AR (cycling at 40% of the estimated maximum HR of the respective subject), and SMR (using foam roller on lower extremity muscles). After each recovery intervention, [La-], HR, and TQR were measured. There was no statistically significant difference in [La-] and HR values obtained before the WAnT test (p=0.368, p=0.691, respectively) and right after the WAnT test (0.264, p=0.629) Both AR and SMR were more effective than PR for [La-] removal and obtaining a higher TQR (p<0.001). However, SMR and AR were not superior to one another for blood [La-] removal (p>0.05). In contrast, a significantly higher TQR was observed with SMR than AR and PR (p<0.001). Athletes can apply AR or SMR to recover from strenuous exercise. SMR can be an alternative to PR and AR as a recovery tool.

Research paper thumbnail of Residual effects of static stretching and self-myofascial-release exercises on flexibility and lower body explosive strength in well-trained combat athletes

Isokinetics and Exercise Science, May 22, 2017

Duration of static stretching is the most crucial factor associated with static stretchinduced im... more Duration of static stretching is the most crucial factor associated with static stretchinduced impairments in explosive muscular performances. The aim of this study was to investigate the acute residual effects of lower body short (S-SS) and long duration static stretching protocols (L-SS) on counter movement jump (CMJ) performances in skilled female combat athletes. Twelve well-trained female combat athletes (training experience: 11.5 ∓ 3.6 years) performed S-SS (6 min of total stretch duration) and L-SS (12 min of total stretch duration) separated by 48 hours in a randomized, balanced order. After each protocol, participants performed, respectively, counter movement jump with arm swing (CMJAS) and with hands on hip (CMJHH) separated by 30-second rest interval at the 15th second and 1st, 5th, 10th, 15th, and 20th minute of the 20-minute recovery period. An insignificant interaction effect was found for Protocol × Time in CMJ heights (p = 0.722) indicating that both S-SS and L-SS reduced CMJ heights to a similar extent over the course of 20 min recovery period. S-SS and L-SS led to a mean CMJ height reduction of 6.29% (p < 0.05, d = 0.603) and 6.74% (p < 0.05, d = 0.610), respectively. Greater than 50% of participants experienced a reduction in CMJAS height exceeding minimum detectable change score with 90% confidence at each time point during the recovery period without exception. Use of static stretching protocols

Research paper thumbnail of The effect of static and dynamic core exercises on dynamic balance, spinal stability, and hip mobility in female office workers

Turkish journal of physical medicine and rehabilitation, Sep 9, 2020

This paper was presented partially as an oral presentation on the 16

Research paper thumbnail of Effects of 6-Week Resistance Elastic Band Exercise on Functional Performances of 8-9 Year-Old Children

Journal of education and training studies, Dec 17, 2018

The purpose of this study was to investigate the effects of 6-week exercises performed by elastic... more The purpose of this study was to investigate the effects of 6-week exercises performed by elastic resistance band on functional performance (balance, agility, hand grip strength and flexibility) in children aged 8-9 years. So, 102 students participated in this study according to pre-test and post-test design. Participants were divided into two groups: experimental group (n=50, height: 134.0 ± 6.3 cm, mass: 30.9 ± 7.9 kg, age: 8.6 ± 0.5 years) and control group (n=52, height: 135.0 ± 6.2 cm, mass: 32.4 ± 5.9 kg, age: 8.6 ± 0.6 years). The experimental group performed exercises using elastic resistance bands of lightness grade at the same time of day (45 minutes/day, 3 days/week), and the control group did not participate in any physical activity. Balance was measured by Flamingo Test, agility by Ilinois, flexibility by sit and reach box and strength was measured by hand-grip dynamometer. It was determined that 6-week exercises performed by elastic resistance band increased significantly the hand grip strength; however there was no statistically significant effect on balance, agility and flexibility abilities. The inclusion of elastic resistance band exercises in the context of school activity programs can improve children's strengths. For this reason, exercises performed by elastic resistance bands for more than 6 weeks can be added to activity programs in school as an economical, fun and reliable way to improve the hand-grip performance of children.

Research paper thumbnail of Avoiding Systematic Errors in Isometric Squat-Related Studies without Pre-Familiarization by Using Sufficient Numbers of Trials

Journal of Human Kinetics, Oct 1, 2014

There is no scientific evidence in the literature indicating that maximal isometric strength meas... more There is no scientific evidence in the literature indicating that maximal isometric strength measures can be assessed within 3 trials. We questioned whether the results of isometric squat-related studies in which maximal isometric squat strength (MISS) testing was performed using limited numbers of trials without pre-familiarization might have included systematic errors, especially those resulting from acute learning effects. Forty resistance-trained male participants performed 8 isometric squat trials without pre-familiarization. The highest measures in the first "n" trials (3 ≤ n ≤ 8) of these 8 squats were regarded as MISS obtained using 6 different MISS test methods featuring different numbers of trials (The Best of n Trials Method [BnT]). When B3T and B8T were paired with other methods, high reliability was found between the paired methods in terms of intraclass correlation coefficients (0.93-0.98) and coefficients of variation (3.4-7.0%). The Wilcoxon's signed rank test indicated that MISS obtained using B3T and B8T were lower (p < 0.001) and higher (p < 0.001), respectively, than those obtained using other methods. The Bland-Altman method revealed a lack of agreement between any of the paired methods. Simulation studies illustrated that increasing the number of trials to 9-10 using a relatively large sample size (i.e., ≥ 24) could be an effective means of obtaining the actual MISS values of the participants. The common use of a limited number of trials in MISS tests without pre-familiarization appears to have no solid scientific base. Our findings suggest that the number of trials should be increased in commonly used MISS tests to avoid learning effect-related systematic errors.

Research paper thumbnail of Farklı spor branşlarında tüm vücut vibrasyonunun kassal aktivasyon üzerine etkisinin incelenmesi

Bu çalışmanın amacı farklı spor branşlarındaki sporcuların statik ve dinamik hareketler sırasında... more Bu çalışmanın amacı farklı spor branşlarındaki sporcuların statik ve dinamik hareketler sırasında farklı frekans ve genlik değerlerindeki Tüm Vücut Vibrasyon (TVV) uyaranında verdikleri kassal aktivasyon yanıtlarını yüzeyel Elektromiyografi (sEMG) ile araştırmaktır. Bir kulübe bağlı, lisanlı olarak futbol, basketbol ve yüzme branşlarında yarışan toplam 20 katılımcı (7 futbolcu, 7 basketbolcu, 6 yüzücü) ile gerçekleştirilen çalışmada, katılımcıların 30 saniye TVV uygulaması altında iken statik ve dinamik skuat sırasında tibialis anterior, gastrocnemius medialis, vastus medialis, rectus femoris, vastus lateralis ve biceps femoris kaslarının sEMG ile aktiviteleri ölçüldü. Katılımcıların 5 dakika dinlenme aralıkları ile TVV öncesinde ve TVV sırasında gerçekleştirdikleri statik ve dinamik skuat sırasında kaydedilen sEMG'ye ait RMS (root mean square) değerleri TVV uygulamaları öncesinde elde edilen MİK (maksimal istemli kasılma) değerlerine göre belirlendi. Elde edilen veriler 3 2 7 (...

Research paper thumbnail of A Method for Measuring Vertical Jump Height by Using Long Exposed Photographs

Research paper thumbnail of Studies of Thermoluminescence Properties of Mersin's Quartz Sand with X-ray Irradiation

The quartz samples collected from quartz sand deposits from Yeşilovacık Mersin region were studie... more The quartz samples collected from quartz sand deposits from Yeşilovacık Mersin region were studied Thermoluminescence (TL) from room temperature to 400 o C after irradiated by X-ray source. Thermoluminescence trap parameters were calculated via Various Heating Rate (VHR) method. Heating rates were selected as 0.5 o C/s, 1 o C/s, 2 o C/s, 5 o C/s, 10 o C/s. The peak maximum temperature shift values from TL glow curve at 90 o C, 210 o C and 320 o C were monitored by VHR method. The temperature shift along to heating rates were used to calculate the trap parameters as Activation Energy (E) and Frequency Factor (s). The activation and frequency factor values were obtained as 0.84eV, 2.84x10 10 s -1 , 1.13eV, 2.34x10 13 s -1 and 1.78eV, 1.59x10 18 s -1 at selected peaks.

Research paper thumbnail of Mersin Kuvars Kumunun X-Işinlari ile Termoluminesans Özelliklerinin Çalişilmasi

The quartz samples collected from quartz sand deposits from Yesilovacik Mersin region were studie... more The quartz samples collected from quartz sand deposits from Yesilovacik Mersin region were studied Thermoluminescence (TL) from room temperature to 400oC after irradiated by X-ray source. Thermoluminescence trap parameters were calculated via Various Heating Rate (VHR) method. Heating rates were selected as 0.5oC/s, 1oC/s, 2oC/s, 5oC/s, 10oC/s. The peak maximum temperature shift values from TL glow curve at 90oC, 210oC and 320oC were monitored by VHR method. The temperature shift along to heating rates were used to calculate the trap parameters as Activation Energy (E) and Frequency Factor (s). The activation and frequency factor values were obtained as 0.84eV, 2.84x1010 s-1, 1.13eV, 2.34x1013 s-1 and 1.78eV, 1.59x1018s-1 at selected peaks

Research paper thumbnail of Acute Residual Effects of Short and Long Duration Static Stretching on Counter Movement Jump Performances in Well-Trained Female Combat Athletes

European Journal of Physical Education and Sport Science, 2016

Duration of static stretching is the most crucial factor associated with static stretch-induced i... more Duration of static stretching is the most crucial factor associated with static stretch-induced impairments in explosive muscular performances. The aim of this study was to investigate the acute residual effects of lower body short (S-SS) and long duration static stretching protocols (L-SS) on counter movement jump (CMJ) performances in skilled female combat athletes. Twelve well-trained female combat athletes (training experience: 11.5 ∓ 3.6 years) performed S-SS (6 min of total stretch duration) and L-SS (12 min of total stretch duration) separated by 48 hours in a randomized, balanced order. After each protocol, participants performed, respectively, counter movement jump with arm swing (CMJ AS ) and with hands on hip (CMJ HH ) separated by 30-second rest interval at the 15th second and 1st, 5th, 10th, 15th, and 20th minute of the 20-minute recovery period. An insignificant interaction effect was found for Protocol × Time in CMJ heights (p = 0.722) indicating that both S-SS and L-...

Research paper thumbnail of The effect of static and dynamic core exercises on dynamic balance, spinal stability, and hip mobility in female office workers

Turkish Journal of Physical Medicine and Rehabilitation, 2020

This paper was presented partially as an oral presentation on the 16

Research paper thumbnail of The Effects of Whole Body Vibration Treatments on Lower Body Muscular Activity in Well-Trained Athletes from Different Sports Branches

Journal of Education and Training Studies, 2018

A limited number of acute whole body vibration (WBV) studies have investigated the effects of WBV... more A limited number of acute whole body vibration (WBV) studies have investigated the effects of WBV treatments which were applied with different vibration frequencies and amplitude combinations on lower extremity muscle activation of well-trained athletes from different sports branches. To compare the effects of WBV on lower extremity muscle activation via Surface Electromyography (sEMG) of well-trained athletes from different sports branches (soccer, basketball and swimming) during static and dynamic squat exercises. sEMG activities of Tibialis Anterior (TA), Gastrocnemius Medialis (GM), Vastus Medialis (VM), Rectus Femoris (RF), Vastus Lateralis (VL) and Biceps Femoris (BF) muscles of 7 male soccer players, 7 male basketball players, and 6 male swimmers were recorded during WBV applied in static squat and dynamic squat positions with different frequencies (30-35-40 Hz) and amplitude (2-4 mm) combinations separated from each other by 5 min passive rest periods. Each combination was a...

Research paper thumbnail of Comparison of the Effect of Passive and Active Recovery, and Self-Myofascial Release Exercises on Lactate Removal and Total Quality of Recovery

Journal of Education and Training Studies, 2018

Recovery from exercise-induced fatigue is crucial for subsequent performance. Self-myofascial rel... more Recovery from exercise-induced fatigue is crucial for subsequent performance. Self-myofascial release (SMR) using a foam roller is an alternative to active recovery (AR). This study aims to compare the effects of passive recovery (PR), AR, and SMR on blood lactate [La-] removal and total quality of recovery (TQR). Twenty-two well trained male athletes (age: 22.6±2.9 years) underwent three testing sessions conducted 72 hours apart but at the same time of each day in a randomized order. After determining resting [La-] and heart rate (HR), the subjects completed a Wingate anaerobic test (WAnT), triggering muscular fatigue. HR and [La-] were measured threeminutes after the WAnT, following which the subjects underwent one of the three different recovery interventions over 15 minutes: PR (lying supine), AR (cycling at 40% of the estimated maximum HR of the respective subject), and SMR (using foam roller on lower extremity muscles). After each recovery intervention, [La-], HR, and TQR were...

Research paper thumbnail of The Effects of 12 Weeks Pilates Exercises on Functional and Cognitive Performance in Elderly People

Journal of Education and Training Studies, 2019

The aim of the study was to investigate the effects of 12 weeks Pilates exercises on functional a... more The aim of the study was to investigate the effects of 12 weeks Pilates exercises on functional and cognitive performance in elderly people which are living in an elderly care center. Forty three elderly were randomly allocated either to Pilates group (PG, n= 21; mean age, 72.8 ± 7.84 years), which performed three session of Pilates per week for 12 weeks, or to control group (CG, n= 22; mean age, 77.7 ± 7.25 years), which no performed any exercise is except from daily works. Participants tested to handgrip strength, Berg balance scale, Functional reach test and Mini Mental State Examination Test before and after the 12 weeks of exercise. Finally, PG demonstrated improvement in all variables. However, CG has no improvement any variables. Pilates exercises led to significant improvement in functional and cognitive performance. Therefore, elderly people can apply a well-structured Pilates exercise program under Pilates instructor and physiotherapist.

Research paper thumbnail of Myofascial Training Paradigm

International Journal of Sport, Exercise & Training Sciences, 2018

Fitness Trendleri Araştırmasına göre Self-Myofasyal Release (SMR) egzersizleri, son 3 yılın fitne... more Fitness Trendleri Araştırmasına göre Self-Myofasyal Release (SMR) egzersizleri, son 3 yılın fitness trendleri arasında, ilk yirmi'de yer almaktadır. SMR egzersizleri antrenör ve sporcular tarafından sıklıkla tercih edilmesine rağmen, SMR egzersizlerinin sporcu performansı üzerindeki sonuçları çelişkilidir. Bu derlemede, SMR egzersizlerinin sporcu performansı üzerindeki etkilerinin araştırılması amaçlandı.

Research paper thumbnail of Effects of 6-Week Resistance Elastic Band Exercise on Functional Performances of 8-9 Year-Old Children

Journal of Education and Training Studies, 2018

The purpose of this study was to investigate the effects of 6-week exercises performed by elastic... more The purpose of this study was to investigate the effects of 6-week exercises performed by elastic resistance band on functional performance (balance, agility, hand grip strength and flexibility) in children aged 8-9 years. So, 102 students participated in this study according to pre-test and post-test design. Participants were divided into two groups: experimental group (n=50, height: 134.0 ± 6.3 cm, mass: 30.9 ± 7.9 kg, age: 8.6 ± 0.5 years) and control group (n=52, height: 135.0 ± 6.2 cm, mass: 32.4 ± 5.9 kg, age: 8.6 ± 0.6 years). The experimental group performed exercises using elastic resistance bands of lightness grade at the same time of day (45 minutes/day, 3 days/week), and the control group did not participate in any physical activity. Balance was measured by Flamingo Test, agility by Ilinois, flexibility by sit and reach box and strength was measured by hand-grip dynamometer. It was determined that 6-week exercises performed by elastic resistance band increased significan...

Research paper thumbnail of Comparing the Effectiveness of Whole Body Vibration and Local Vibration Exercise on Counter-Movement Jump Performance and Its Residual Characteristics in Well-Trained Athletes

International Journal of Sports Exercise and Training Sciences, 2017

Aim: This study aimed to compare the effectiveness of whole body vibration (WBV) and local vibrat... more Aim: This study aimed to compare the effectiveness of whole body vibration (WBV) and local vibration (LV) exercise on counter-movement jump performance (CMJ) and its residual characteristics in well-trained athletes. Material and Methods: Thirty-two male athletes (age: 22.3±3.2 years) visited the laboratory twice, 48 hours apart, and performed WBV and LV in two sessions of equal duration. Each test day had two parts (sham [0 Hz, 0 mm] and vibration treatment [50 Hz, 4 mm]), 20 min apart. LV or WBV were applied for 6×15 sec with 1 min passive rest between repetitions. During the LV, participants were asked to lie supine (2×15 sec) and then lie laterally (2×2×15 sec) such that the quadriceps muscles connected to the WBV device. WBV was applied in the squatting position at 135º knee angle. After each session, the participants were tested for CMJ for 8 min at the 1 st , 2 nd , 3 rd , 4 th ,6 th , and 8 th min. Results: The results of two-factor repeated measures ANOVA test revealed that both WBV (p = 0.27; n p 2 = 0.04) and LV (p = 0.57; n p 2 = 0.03) and their sham conditions decreased CMJ height to a similar extent. Further, there was no statistically significant difference between WBV and LV at any measurement time point (p>0.05). Conclusion: WBV and LV were not effective methods to enhance the CMJ performance of well-trained athletes. However, WBV platform can be safely used as LV exercise equipment since no adverse effect was observed. Combat athletes Vertical sinusoidal vibration Explosive strength Lower body Article Info

Research paper thumbnail of Residual effects of static stretching and self-myofascial-release exercises on flexibility and lower body explosive strength in well-trained combat athletes

Isokinetics and Exercise Science, 2017

Duration of static stretching is the most crucial factor associated with static stretchinduced im... more Duration of static stretching is the most crucial factor associated with static stretchinduced impairments in explosive muscular performances. The aim of this study was to investigate the acute residual effects of lower body short (S-SS) and long duration static stretching protocols (L-SS) on counter movement jump (CMJ) performances in skilled female combat athletes. Twelve well-trained female combat athletes (training experience: 11.5 ∓ 3.6 years) performed S-SS (6 min of total stretch duration) and L-SS (12 min of total stretch duration) separated by 48 hours in a randomized, balanced order. After each protocol, participants performed, respectively, counter movement jump with arm swing (CMJAS) and with hands on hip (CMJHH) separated by 30-second rest interval at the 15th second and 1st, 5th, 10th, 15th, and 20th minute of the 20-minute recovery period. An insignificant interaction effect was found for Protocol × Time in CMJ heights (p = 0.722) indicating that both S-SS and L-SS reduced CMJ heights to a similar extent over the course of 20 min recovery period. S-SS and L-SS led to a mean CMJ height reduction of 6.29% (p < 0.05, d = 0.603) and 6.74% (p < 0.05, d = 0.610), respectively. Greater than 50% of participants experienced a reduction in CMJAS height exceeding minimum detectable change score with 90% confidence at each time point during the recovery period without exception. Use of static stretching protocols