Hormonal responses to a single session of wholebody vibration exercise in older individuals (original) (raw)
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Muscular and Hormonal Responses to Whole Body Vibration Exercises in Elderly
2014
Purpose this study was conducted to evaluate the muscular and hormonal responses in elderly males following a program of whole body vibration (WBV) exercise. Subjects Sixty male participants aged from 62 to 75 years were recruited from Hedaya Barakat residential care centre to participate in this study. They divided into two groups: WBV group (n=30) and the control group (n=30). ProcedureWBV exercise was performed at intensity of 12 -20 Hz for duration of 4 minutes, three times weekly, for a total treatment period of eight weeks. Hormonal measurements for testosterone (T) and growth hormone (GH), mechanical measurements for isokinetic plantar and dorsiflexion peak torque, isokinetic knee flexion and extension peak torque were performed. Student's t test for independent samples was used for the statistical analysis, considering p< 0.05 as the statistical significance level. Results hormonal measurements showed significant increase in the plasma concentration of T and GH. The m...
Journal of musculoskeletal & neuronal interactions, 2012
Whole body vibration (WBV) is a novel training intervention but a comparison of different methods of WBV has rarely been performed. To compare the short and medium term effects of two regimens of WBV on endocrine status, muscle function and markers of bone turnover. Over a period of 16 weeks, 10 men with a median age of 33 yrs (range, 29,49), were randomised to stand on the Galileo platform (GP) or Juvent1000 platform (JP) 3 times/wk. The total study duration was 16 weeks with measurements performed in a 4 week period of run-in, 8 weeks of WBV and a 4 week period of washout. These measurements included an assessment of anthropometry, body composition, muscle function and biochemical markers of endocrine status and bone turnover. To assess immediate effects of WBV, measurements were also performed at 60 mins before and 5, 30 and 60 mins after WBV. To assess immediate effects of WBV, measurements were also performed at 60 mins before and 5, 30 and 60 mins after WBV. GP at 22 Hz was as...
Clinical physiology …, 2006
Whole body vibration (WBV) has been suggested as an alternative form of exercise producing adaptive responses similar to that of resistance training. Very limited information is available on the effects of different vibration parameters on anabolic hormones. In this study, we compared the acute effects of different WBV amplitudes on serum testosterone (T) and insulin growth factor-1 (IGF-1). Nine healthy young recreationally active adult males (age 22 ± 2 years, height 181 ± 6.3 cm, weight 77AE4 ± 9AE5 kg) voluntarily participated in this randomized controlled (cross-over design) study. The subjects performed 20 sets of 1 min each of WBV exercise in the following conditions: Non-vibration condition (control), low amplitude vibration [low (30 Hz, 1AE5 mm peak-to-peak amplitude)] and high amplitude vibration [high (30 Hz, 3 mm peak-to-peak amplitude)]. Blood samples were collected before, after 10 sets, at the end (20th set) and after 24 h of the exercise bout. WBV exercise did not produce significant changes in serum T and IGF-1 either with low or high amplitude when compared with the control condition. The results of this study demonstrate that a single session of WBV exposure with a frequency of 30 Hz and amplitudes of 1AE5 and 3 mm does not noticeably alter serum T and IGF-1 levels.
Clinical physiology …, 2007
Whole body vibration (WBV) has been proposed as an alternative exercise stimulus to produce adaptive responses similar to resistance exercise. Few studies have analysed acute hormonal responses to WBV. Purpose To evaluate neuromuscular and hormonal responses to an acute bout of isometric half-squat exercise with and without superimposition of WBV. Methods Seven healthy males (22AE3 ± 2AE7 years) performed 10 sets of half squat isometric exercise for 1 min with 1-min rest between sets. Two separate trials were conducted either with WBV [30 Hz; 3AE5 g (1 g = 9AE81 mAEs 2 )] or without vibration (Control). Salivary concentration of testosterone and cortisol was collected and maximal isometric unilateral knee extensions (MVC) were completed before, immediately after, 1, 2 and 24 h after treatment. Results Significant decreases in MVC were observed immediately after (229AE4 ± 53AE2 Nm), 1 h (231AE6 ± 59AE9 Nm), and 2 h (233AE0 ± 59AE1 Nm) after WBV compared with baseline (252AE7 ± 56AE4 Nm; P<0AE05). No significant change in MVC was recorded in Control. Rate of torque development in the first 200 ms (RTD 200 ms ), and salivary testosterone and cortisol concentrations were unaffected in both conditions. However, there was a trend for change over time in cortisol (P = 0AE052), with an increase after WBV and decrease after Control. Conclusion A 10 min session of intermittent WBV was shown to produce an acute reduction in MVC in healthy individuals, which recovered after 24 h. No significant changes were identified in salivary concentration of testosterone and cortisol suggesting that WBV with low acceleration does not represent a stressful stimulus for the neuroendocrine system. responses of human skeletal muscle to vibration exposure. Clin Physiol (1999); 19: 183-187.
Effects of vibration and resistance training on neuromuscular and hormonal measures
European Journal of Applied Physiology, 2006
The aim was to study whether whole body vibration (WBV) combined with conventional resistance training (CRT) induces a higher increase in neuromuscular and hormonal measures compared with CRT or WBV, respectively. Twenty-eight young men were randomized in three groups; squat only (S), combination of WBV and squat (S+V) and WBV only (V). S+V performed six sets with eight repetitions with corresponding eight repetition maximum (RM) loads on the vibrating platform, whereas S and V performed the same protocol without WBV and resistance, respectively. Maximal isometric voluntary contraction (MVC) with electromyography (EMG) measurements during leg press, counter movement jump (CMJ) measures (mechanical performance) including jump height, mean power (P mean ), peak power (P peak ) and velocity at P peak (V ppeak ) and acute hormonal responses to training sessions were measured before and after a 9-week training period. ANOVA showed no significant changes between the three groups after training in any neuromuscular variable measured [except P mean, S higher than V (P<0.05)]. However, applying t tests within each group revealed that MVC increased in S and S+V after training (P<0.05). Jump height, P mean and P peak increased only in S, concomitantly with increased V ppeak in all groups (P<0.05). Testosterone increased during training sessions in S and S+V (P<0.05). Growth hormone (GH) increased in all groups but S+V showed higher responses than S and V (P<0.05). Cortisol increased only in S+V (P<0.05). We conclude that combined WBV and CRT did not additionally increase MVC and mechanical performance compared with CRT alone. Furthermore, WBV alone did not increase MVC and mechanical performance in spite of increased GH.
Scientific Research and Essays, 2015
Vibration is a mechanical stimulus that is characterized by an oscillatory motion. When there is a direct contact of a person, in general standing on the base of this type of platform, the vibration that is produced in these machines is transmitted to the body of the subject producing whole body vibration (WBV) exercises. Biological effects can be associated with the WBV exercises with desirable and undesirable consequences. These effects of the WBV exercises seem to be related to a direct effect in a tissue/organ/system and/or or to indirect effects due to alteration of the plasma concentration of some hormonal and non hormonal biomarkers. The aim of this investigation is to present a revision about hormonal and non hormonal biomarkers in human beings submitted to WBV exercises that have suffered alteration in the plasma concentrations. Searches were performed in the PubMed and Scopus databases with the key words "whole body vibration". Papers were selected following defined criteria. Considering the WBV exercise, hormonal fluctuations of testosterone, growth, insulin-like growth factor1, epinephrine, norepinephrine, cortisol, irisin, parathyroid hormone and sclerotin are observed. Non hormonal biomarkers have suffered alterations in response to WBV, as glucose, free fatty acids, adiponectin, transforming growth factor-beta1, nitric oxide, osteopontin, interleukin-1beta, bonespecific alkaline phosphatase, cartilage oligometric matrix protein and tumor necrosis factor-alpha in plasma concentration. In conclusion, putting together the findings related to the alterations of the concentration of hormonal and non hormonal biomarkers due to the WBV exercises, it is possible that the fluctuations in the plasma concentrations of these biomarkers might help us understand better the biological effects of this kind of exercises, probably due to neuroendrocrine responses.
Steroids, 2012
The hormonal response of 32 older men (70-80 years) to a bout of sub-maximum aerobic exercise was examined before, after 16 weeks of resistance or aerobic training and again after 4 weeks of detraining. Blood samples were obtained at rest and immediately post sub-maximum exercise (30 min @ 70% VO 2 max) to determine the concentrations of growth hormone (GH), insulin-like growth factor-1 (IGF-1), testosterone (Test), sex hormone-binding globulin (SHBG) and the calculation of free testosterone (FT). Both training groups had significant increases in leg strength and VO 2 max after 16 weeks training but leg strength and VO 2 max returned to pre-training levels in the aerobic training and resistance training groups, respectively. During the 20 week study there was no change in resting concentrations of any hormones among the three groups. There was no increase in GH, IGF-1 or SHBG immediately post sub-maximum exercise in any of the groups before training, after 16 weeks training or after 4 weeks detraining. Testosterone and FT increased immediately post sub-maximum exercise within all groups before training, after 16 weeks training and after 4 weeks detraining with the increase in Test and FT higher after 16 weeks of resistance training compared to before training and after 4 weeks detraining within the resistance training group. The increased responsiveness of Test and FT after 16 weeks of resistance training was lost after 4 weeks of detraining. Our results indicate that some physiological and hormonal adaptations gained after 16 weeks training are lost after only 4 weeks detraining.
International Journal of Environmental Research and Public Health
Whole-body vibration (WBV) exercises have recently been introduced as a nonpharmacological therapeutic strategy for sarcopenic older people. The present study aimed to evaluate the effect of WBV exercise on hemodynamic parameters in sarcopenic older people. Forty older people, divided into groups of nonsarcopenic (NSG = 20) and sarcopenic (SG = 20), participated in the study and were cross randomized into two interventions of eight sets of 40 s each, these being squatting with WBV and squatting without WBV. Heart rate (HR), peak heart rate (peak HR), systolic blood pressure (SBP), diastolic blood pressure (DBP), double product (DP), mean arterial pressure (MAP), and subjective perception of effort (SPE), were assessed at baseline, during, and after a single WBV session. The HR, peak HR, and DP variables were similar at baseline between groups. WBV exercise increased all the hemodynamic parameters both during and immediately after the intervention, in both groups (SG and NSG). The MA...
Effect of whole-body-vibration training in institutionalized older adults
European Geriatric Medicine, 2013
The purpose of the present study was to determine the effect of whole body vibration training with a 1-month intervention period and 3-month no intervention follow up on cardiovascular diseases risk factors in inactive adults. Eleven inactive adults (age 47.45±6.05 years, height 160.24± 9.63 cm and body mass 72.42±6.98kg) were randomly chosen and took part in the study. Vibration training included 11-17 minutes of different positioning in frequency of 25-35Hz, done once a day for 30 sessions. Concentration of fasting blood sugar, total cholesterol, triglyceride, HDL and LDL were measured at three different intervals (baseline, immediately after 1month, after three months detraining). One-way repeated-measures analysis of variance and bonferroni-corrected paired t-tests were used to test for differences between the three intervals. Significance was set at p = 0.05. The results showed that Significant difference was detected in concentration of Fasting blood sugar (p=0.000), total cholesterol (p=0.050) and LDL-C (P=0.050) between three intervals. In contrast no significant difference was observed in concentration of triglyceride (p=0.818) and HDL-C (p=0.293) between all measured time units.In summary, triglyceride and HDL-C did not change significantly during the study period and follow-up, but there was a significant decrease of concentration of Fasting blood sugar, total cholesterol and LDL-C after 1 month compared to baseline. These data suggest that Whole body vibration training may have the potential to reduce cardiovascular diseases risk factors in inactive adults, thus inactive adults lacking stamina for doing exercise can be put for vibration training as an effective substitute.
Scandinavian Journal of Medicine & Science in Sports, 2010
We examined whether the effect of multipurpose exercise can be enhanced by whole‐body vibration (WBV). One hundred and fifty‐one post‐menopausal women (68.5±3.1 years) were randomly assigned to three groups: (1) a training group (TG); (2) training including vibration (VTG); and (3) a wellness control group (CG). TG and VTG performed the same training program twice weekly (60 min), consisting of aerobic and strength exercises, with the only difference that leg strength exercises (15 min) were performed with (VTG) or without (TG) vibration. CG performed a low‐intensity “wellness” program. At baseline and after 18 months, body composition was determined using dual‐X‐ray‐absorptiometry. Maximum isometric strength was determined for the legs and the trunk region. Leg power was measured by countermovement jumps using a force‐measuring plate. In the TG lean body mass, total body fat, and abdominal fat were favorably affected, but no additive effects were generated by the vibration stimulus...