amirhossein barati | Shahid Beheshti University (original) (raw)

Papers by amirhossein barati

Middle Eastern Journal of Disability Studies, Mar 10, 2020

Razi Journal of Medical Sciences, Dec 10, 2019

Background: Competitive diving has both a high speed impact and chronic repetitive character. Jum... more Background: Competitive diving has both a high speed impact and chronic repetitive character. Jumping from the springboard with poor posture or the sheer volume of dives can increase risk of chronic overuse injuries. The purpose of this study was to evaluate the relationship between dynamic lower extremity malalignments and elite divers' approach the 1 m springboard. Methods: Passive or reflective markers were attached to posterior surface of the subjects' bodies. Twelve elite divers performed "Forward Diving Straight" with one of the Traditional (TRD) or Hurdle pre-flight (HPF) approach on the 1m springboard. Their dynamic malalignments of ankle, knee and hip were evaluated during diving performance. The relationship between approach pattern and dynamic malalignment of ankle, knee, and hip in the frontal plane at each step was determined using "Generalized Estimating Equation" (GEE) with the "Identity Function" and the "Normal Distribution". Results: The results of GEE modeling showed that the mean dynamic joints malalignments were significantly higher on HPF than TRD group. Conclusion: The postural alignment of lower extremity is affected by the approach pattern. The malalignment of the hip, knee, and especially ankle have substantial interest as potential risk factors for lower extremity injuries. Trainers and coaches are advised to planning for "dynamic postural stability" and "corrective exercises" after recognizing critical points in divers' performance.

DOAJ (DOAJ: Directory of Open Access Journals), Jun 1, 2016

Background and Aim: Children with hearing loss and children with intellectual developmental disor... more Background and Aim: Children with hearing loss and children with intellectual developmental disorders have defects in organizing and sensory integration. The aim of this study was to evaluate the effects of hearing impairment and intellectual disability on children's static and dynamic balance. Methods: This cross-sectional comparative study was conducted on 17 boys with congenital severe to profound sensorineural hearing loss (age 10.54 with SD=2.77), 30 boys with mild intellectual disability (age 10.23 with SD=2.05) and 42 normal healthy boys (age 9.42 with SD=1.79). Balance subtest of Bruininks-Oseretsky-2 test of motor proficiency was used in order to evaluate subjects' static and dynamic balance. Statistical analysis was conducted using SPSS software through Kruskal-Wallis test and Duncan test. Results: The results show that there is a significant difference between groups in static and dynamic balance. (p<0.05), the post hoc test showed that the group with hearing loss and intellectual disability group were significantly different compared to the control group, while no significant difference was observed between hearing loss and intellectual disability group (p>0.05). Conclusion: Children with hearing loss and intellectual impairment compared to healthy children almost equally showed a lower balance performance and it is required to provide the children with rehabilitation programs to maintain independence.

The aim of this study was to investigate the effect of fatigue on electromyography activity of bi... more The aim of this study was to investigate the effect of fatigue on electromyography activity of biceps femoris, gastrocnemius and soleus muscles of soccer players. Materials and Methods: In this study timing and electromyography activity of biceps femoris, medial gastrocnemius and soleus of soccer players (15 subjects) during different times of football were investigated. Surface electromyography (ME6000) was used to collect data during single leg drop (before the game, after the first and the second half time). Results: Results of this study showed that although fatigue affects muscle's timing but in different periods of time it wasn't significant (P>0.05). Conspiciously, significant differences were observed for feedforward activity of biceps femoris and soleus (P≤0.05), but for medial gastrocnemius it wasn't significant (P>0.05). Also significant differences were observed for feedback activity of soleus muscles (P≤0.05), but it wasn't significant for biceps femoris and medial gastrocnemius (P>0.05). Conclusion: It can be concluded that fatigue leads to insignificant changes in timing but there were significant differences for feed forward activity of biceps femoris and soleus and feedback activity of soleus. So, during training sessions, trainers should be trying to improve player's tolerance and prevent soccer injuries.

Studia sportiva

Objectives: The objective of the evaluation was to study and determine the impact of eight weeks ... more Objectives: The objective of the evaluation was to study and determine the impact of eight weeks of aerobic training (AT) on liver enzymes and changes in hematological profile in children with leukemia.Methods: This is a semi-experimental and applied study. Statistical samples include 24 children aged 7 to 10 years that referred to hospital and were divided randomly into two control (n=12) and experimental (n=12) groups. Eight-week AT with 40 to 70 percent of heart rate reserve, three sessions per week, no exercise training program was observed in the controls during the study. We measure Liver enzymes such as Aspartate aminotransferase (AST) and alanine aminotransferase (ALT), Hemoglobin (Hb), White Blood Cells (WBC), platelets (PLT), and bilirubin. Data analysis using a paired t-test and analysis of covariance was performed with software SPSS version 20.Results: The results showed that moderate-intensity AT has a significant effect on hemoglobin and liver enzyme levels and a signi...

Journal of Research in Rehabilitation Sciences, Aug 30, 2012

ABSTRACT Introduction:High rate of loading is related to osteoarthritis and genu varum result in ... more ABSTRACT Introduction:High rate of loading is related to osteoarthritis and genu varum result in osteoarthritis. Knowing the rate of affected biomechanical variables during landing which is the cause of this deformity result in fundamental understanding to prevent osteoarthritis in people with genu varum deformity. Hence the purpose of this study is to compare the peak vertical ground reaction forces and the rate of loading during single leg drop landing between men with genu varum deformity and normal knee. Materials and Methods:Fourthy male students in physical education and sport science participated in this research; subjects were 21 people with genu varum deformity and 19 with normal knee. Genu varum deformity was measured and recorded by a caliper. Subjects performed single-leg landing dropping from a 0.3 m height onto a force platform. Statistical analysis of data was performed between two groups via MANOVA test. Results:No significant difference was found in the peak vertical ground reaction during metatarsal contact (P = 0.48). However the peak vertical ground reaction force in calcaneus contact (P = 0.02) and the rate of loading (P = 0.04) between groups were significantly different. Conclusion:Subtle variations in frontal plane of tibiofemoral joint angulation and standing foot angle, influence knee and ankle joint forces, moments, and muscle activation characteristics. The higher rate of injury and osteoarthritis risk in people with genu varum in respect to normal ones might be due to higher ground reaction forces and the rate of high loading inserted to the extremity during landing. To diminish the risk of injury and osteoarthritis, corrective exercises and corrected biomechanical activity are recommended. Keywords:Peak vertical ground reaction forces, Rate of loading, Single leg drop landing, Genu varum

Iranian Journal of War and Public Health, 2017

Aims Low back pain as a common health issue is more problematic than other complications of amput... more Aims Low back pain as a common health issue is more problematic than other complications of amputation. Due to the etiology of amputation in veterans, different factors may be related to the severity of back pain. The aim of this study was to evaluate the factors related to the severity of low back pain in veterans with unilateral below-knee amputation. Instruments & Methods In this descriptive correlational study, 62 male veterans with unilateral below-knee amputation in 2016 were selected using available sampling method from Center of Orthosis and Prosthetics Kowsar in Tehran. The severity of back pain and disability caused by low back pain were evaluated by Numeric Pain Rating Scale (NPRS) and Oswestry Disability Index (ODI), respectively. Biomechanical evaluations were carried out using surface electromyography. Data was analyzed by SPSS 20 software using Pearson correlation coefficient, Spearman's rank correlation coefficient, simple linear regression and Chi square test. Findings There was a significant correlation between pain severity and asymmetry index of superficial lumbar multifidus muscle (r=0.31; p=0.01). Asymmetry index of superficial lumbar multifidus muscle could predict 0.09 of pain severity (p<0.05). The severity of low back pain were also correlated significantly with smoking history (r=0.21; p=0.04), psychological disorders (r=0.25; p=0.02), prosthetic height (r=0.21; p=0.04) and the use of auxiliary device (r=0.03; p=0.27). Conclusion Muscle asymmetry due to the use of the prosthesis, prosthesis height, amputationassociated psychological disorders and smoking are the factors related to the severity of low back pain in veterans with unilateral below-knee amputation.

Asian Journal of Sports Medicine, 2013

Iranian Rehabilitation Journal, 2022

Due to the importance of postpartum maternal health and the effect of pregnancy on the increase o... more Due to the importance of postpartum maternal health and the effect of pregnancy on the increase of recti diastasis rectus abdominis (DRA), this study aimed to compare the effect of eight weeks of core and Kegel exercise with emphasis on correcting the respiratory pattern on DRA in multiparous women. Methods: This is a semi-experimental study that was conducted on 45 pregnant women who had given birth six weeks ago selected according to the inclusion criteria. Individuals were divided into three selected training groups, including central area, Kegel, and control. The covariance analysis was used for intergroup comparison and a correlated t-test was used for comparison within a group. The statistical analysis was done by SPSS software, version 27. Results: The results of this study showed the effect of both training programs on reducing the distance between the recti-abdominal muscles (P<0.001). No significant difference was reported between the two training groups in this regard. Also, there was a significant difference in terms of pain between the two training groups and the control group (P<0.05), but there was no significant difference between the two training groups (P>0.045). Discussion: Due to the reduction of pain and DRA, it seems that using the two training programs can lead to desirable results for the people and represents the importance of using the exercises in the postpartum period.

Background: Approach on the diving springboard provides the initial conditionsfor the disturbance... more Background: Approach on the diving springboard provides the initial conditionsfor the disturbance in the stability of the base of support. The present study is acorrelational study conducted to obtain complete and accurate information byexamining “the relationship between diving score and dynamic malalignmentof Hip, Knee, and Ankle on a 1 m springboard by elite male divers.”Methods: In the present cross-sectional study, the subjects of this study were the12 top divers of the Iranian League Championship in summer 2016. The passiveor reflective markers were attached to the posterior surface of subjects’ bodies.The subjects performed Forward Diving Straight (FDS) technique in one of twoways, either the “Hurdle Pre-Flight” or “Hurdle Flight”, and the head coachgave them scores. The x and y coordinates of each marker were estimated usingKINOVEA software. The relationship among the performance score of “FDS”and dynamic malalignment of Ankle, Knee, and Hip joints in the frontal planeat eac...

مجله دانشگاه علوم پزشکی گرگان, 2020

Background and Objective: Children with ADHD suffer from motor impairment in addition to behavior... more Background and Objective: Children with ADHD suffer from motor impairment in addition to behavioral problems (hyperactivity/impulsivity, attention deficit).The cerebellum receives data from visual, vestibular and somato- sensory systems.This study was done to determine the correlation between kinetic parameters of balance performance and behavioral symptoms in children with attention-deficit/hyperactivity disorder. Methods: This case - control study was performed on 15 children with ADHD (9.21±0.69 year) and 15 healthy children (9.27±0.75 year). Kinetic parameter of balance evaluated using sensory organization test (SOT) in different sensory conditions including visual, somatosensory and vestibular by Neurocom. Conner's questionnaire used to assess hyperactivity and attention deficit in addition to a psychologist. Results: Dynamic balance score in ADHD children was significantly lower in compare to controls (p<0.05). Children with ADHD had kinetic parameters of balance perfor...

Background and aims: Aloe vera is a medicinal plant with antioxidant activity. The aim of this st... more Background and aims: Aloe vera is a medicinal plant with antioxidant activity. The aim of this study was to determine the effect of Aloe Vera on lactate de-hydrogenase after a period of aerobic exercise in male athletes. Methods: In this clinical trial study, 20 male students with average weight of 64.85±51 and height of 172.05±6.4 were randomly assigned to 2 groups of Aloe vera supplement (n= 10) and placebo (n= 10). Then aerobic training was conducted for 4 weeks. Then aerobic training was conducted for 4 weeks. In the supplemented group, they were taking 3 capsules, each capsule contains 2 grams of dried Aloe Vera and placebo group were taking 3 capsules containing Dextrin daily after every meal. To determine the index of cell injury marker lactate dehydrogenase (LDH) was determined and blood samples were collected 24 hours before and after each test. The data were analyzed using ANOVA and independent t- test. Significance level was considered as P≤0.05. Results: The findings of ...

Armaghane Danesh Bimonthly Journal, 2019

Background & aim: Multiple sclerosis is an autoimmune disease which damages the central nervous s... more Background & aim: Multiple sclerosis is an autoimmune disease which damages the central nervous system. Disruption of walking is one of the characteristics of multiple sclerosis. Currently, exercise training is known as an effective tool in the rehabilitation of multiple sclerosis. The aim of the present study was to determine the effect(s) of aerobic training with/without blood flow restriction on the length and balance of women with multiple sclerosis. Methods: In a Quasi-experimental study, a pre and post-test design, 24 volunteers with disability degree between 4-1 (height: 159.5 ± 7.27 cm, weight: 61.54 ± 8.58 kg, age: 37.08 ± 8.23 years) were randomly divided into two equal groups: aerobic training without blood flow restriction and blood flow restriction (BFR) aerobic training group. Both groups were ridden for 6 weeks and 3 sessions per week on a bicycle (3 times 6 minutes with 1 minute rest between turns and HR60 6560 percent). To limitation of the blood flow a cuff w...

Non-specific chronic low back pain (NSCLBP) is a common condition with no exact diagnosis and mec... more Non-specific chronic low back pain (NSCLBP) is a common condition with no exact diagnosis and mechanism for its occurrence. Recently, different therapeutic exercises have taken into account to manage NSCLBP. So, the aim of this study has mainly been placed on comparing the effects of Pilates and Mackenzie exercises on quality of life (QOL) lumbar spine position sense (LSPS) in patients with NSCLBP. In this randomized clinical trial, 47 patients with NSCLBP were voluntarily divided into three groups of Pilates (n=16) (with mean age 37.1 ± 9.5 years, height 168.9 ± 7.4 cm, body mass 76.1 ± 5.9 k), McKenzie (n=15) (with mean age 42.7 ± 8.1 years, height 165.7 ± 6.8, body mass 74.1 ± 4.8 kg) and control (n=16) (with mean age 39.3 ± 9.8 years, height 168.1 ± 8.1 cm, body mass 74.2 ± 5.8 kg). Primary outcome included QOL and secondary was LSPS. Both variables were assessed by the WHOQOL-BREF questionnaires and electrogoniameter, respectively. The measurements were performed at baseline, f...

Journal of Clinical Medicine

Chronic neck pain is a common human health problem. Changes in scapular posture and alteration of... more Chronic neck pain is a common human health problem. Changes in scapular posture and alteration of muscle activation patterns of scapulothoracic muscles are cited as potential risk factors for neck pain. The purpose of this study was to compare the effects of neck exercise training (NET) with and without scapular stabilization training (SST) on pain intensity, the scapula downward rotation index (SDRI), forward head angle (FHA) and neck range of motion (ROM) in patients with chronic neck pain and scapular dyskinesia. A total of sixty-six subjects with chronic neck pain and scapular dyskinesia were randomly divided into three groups: neck exercise training, n = 24, combined training (NET + SST), n = 24 and a control group, n = 24. Pain intensity, SDRI, FHA and ROM were measured by the numerical rating scale, caliper, photogrammetry and IMU sensor, respectively. When the combined intervention group consisting of NET and SST was compared with NET alone at six weeks, there was a statisti...

Journal of Shahrekord University of Medical Sciences, 2018

Background and aims: The aim of the present study was to investigate the effect of ten-week exerc... more Background and aims: The aim of the present study was to investigate the effect of ten-week exercises rehabilitation in stable and unstable surfaces on balance and muscles strength of the lower extremity in women with multiple sclerosis. Methods: In this quasi-experimental study, thirty patients were divided randomly into two exercise groups. Training program for groups was carried out in ten weeks, three times per week and each session one hour. Muscles strength was measured with a hand-held dynamometer. One-legged standing and timed get up and go tests were used to assess static and dynamic balance, respectively. The data were analyzed using analysis of ANOVA with repeated measures and independent and dependent t-test. Results: The results showed that there was a significant increase for all diameters of measuring in both exercise groups. Exercise group in unstable surface showed significantly larger improvement in muscles strength and static and dynamic balance compered to exerci...

International Journal of Preventive Medicine, 2013

Background: The present study was done in order to compare balance and footprint parameters in tw... more Background: The present study was done in order to compare balance and footprint parameters in two groups of normal and overweight children. Methods: This semi-experimental study included randomly selected 22 male children (11 normal and 11 overweight boys). To measure the footprint parameters, an ink paper system was used, i.e., after putting their feet in the ink, the subjects were asked to stand comfortably on paper and their footprints were recorded. Then, with the use of ImageJ software, the areas of anterior, middle, and posterior parts, the total area, and the arch index parameter were calculated. For measuring balance in three posterolateral, posteromedial, and anterior directions as well as the total balance, Y-balance test was done. Finally, to analyze the data, mean and standard deviation were calculated and ANOVA test was used to compare the parameters. Results: Data analysis showed a significant difference between normal and overweight subjects in the anterior and poste...