The effect of biofeedback training on electrical activity of trapezius muscles and flexion range of motion in people with shoulder impingement syndrome
Hadi
Miri
Department of Physical Education and Sport Sciences, Amirkabir University of Technology, Tehran, Iran.
author
Fariborz
Hovanloo
Department of Health and Sports Rehabilitation, Physical Education and Sport Science Faculty, Shahid Beheshti
University, Tehran, Iran.
author
Mojtaba
Rahimi Bidhendi
Department of Physical Education and Sport Sciences, Raja University, Qazvin, Iran. ID: JESM-202201-1040
(Corresponding author: Email: mr.mrahimi2015@gmail.com)
author
text
article
2020
eng
Introduction: The aim of present study was to determine the effect of biofeedback training on electrical activity of trapezius muscles and range of motion in people with shoulder impingement syndrome.Martials and Methods: In this study, 20 patients with shoulder impingement syndrome in age range of 20-40 y were selected as the statistical sample and were divided into experimental (n=10) and control (n=10) groups. The experimental group trained by using EMG biofeedback for 8 weeks and 3 sessions per week. The control group was applied only for pre-test and post-test measurements. For data collection, surface electromyography was used to analyze the muscle activity patterns of trapezius muscles (upper, middle, lower), and a goniometer was executed to evaluate the flexion. Shapiro-Wilk test was used to confirm the normality of the data and covariance analysis test was applied to compare pre-test and post-test. Correlated t-test was used to examine within-group changes.Results: In this study, after 8 weeks of biofeedback training in the experimental group, a significant improvement in the electrical activity of the middle trapezius (P=0.000) and lower trapezius muscles (P=0.016) was observed. In addition, a significant improvement in the amount of flexion range of motion (P=0.000) was indicated in the experimental group compared to the pretest and also the control group (P=0.05). However, no significant difference was shown in the muscle activity of the upper trapezius muscle (P=0.776).Conclusion: The present study showed that biofeedback training is effective to improve the electrical activity of trapezius muscle and flexion in people with SIS.
Sport Sciences and Health Research
University of Tehran Press
2981-0205
12
v.
2
no.
2020
125
133
https://sshr.ut.ac.ir/article_86131_0644def08fc3b32e3a8f5fd404c234a7.pdf
dx.doi.org/10.22059/sshr.2020.86131
A comparative study of musculoskeletal imbalances in professional musicians
Zahra
Nouri
MS student, sport injury and corrective exercise, Faculty of sport science, university of Guilan
author
Hasan
Daneshmandi
Professor of sport injury and corrective exercise, Faculty of sport science, university of Guilan
author
seyyed hossein
hosseini
PhD in sport biomechanics, Faculty of sport science, university of Guilan
author
text
article
2020
eng
Introduction: Playing the instrument in different groups of society is increasing day by day. Therefore, it seems necessary to pay attention to musculoskeletal imbalances and their problems in musicians.Martials and Methods: Ninety instrumentalists, including 26 wood wind players (age: 28.46±4.62 year, BMI: 26.59±2.11), 37 string players (age: 28.18±7 year, BMI: 24.92±3.60), and 27 percussionists (age: 31.88±6.6 years, BMI: 24.95±3.32) were selected to participate in this study. Upper and lower extremities were assessed. For statistical analysis ANOVA, Scheffe and Kruskal-Wallis statistical tests were performed in SPSS version 16 with a significance level of 0.05.Results: The results of this study did not show significant differences between the degree of musculoskeletal imbalances of kyphosis and lordosis between the study groups (P˃0.05). Results in musculoskeletal imbalances of scoliosis (sig= 0.001), forward head (sig= 0.001), uneven shoulder (sig= 0.001), torticollis (sig= 0.001), scapular dyskinesia (sig= 0.006) were showed the significant differences between the groups (P˂0.05).Conclusion: According to the results, some musculoskeletal imbalances in the group of wood wind instrumentalists showed a higher intensity and prevalence. These variabilities between different groups of musicians indicate different physical and postural needs to play different instruments.
Sport Sciences and Health Research
University of Tehran Press
2981-0205
12
v.
2
no.
2020
135
144
https://sshr.ut.ac.ir/article_86132_c3547ca877999a376728629547d51f0c.pdf
dx.doi.org/10.22059/sshr.2020.86132
Investigating the relationship between group and individual competition anxiety and its relationship with perfectionism
Mohammad saeid
Kiani
PhD Student, Department of Sports Management, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran.
author
Leila
Nazari
PhD student in Sports Management, Kurdistan University, Sanandaj, Iran
author
text
article
2020
eng
Introduction: The study investigated the relationship between perfectionism and competitive anxiety of group and individual athletes.Martials and Methods: Four hundred individual athletes who according to the coaches were able to participate in competitions were selected by stratified random sampling (50% group and 50% individual). Questionnaire of demographic characteristics, perfectionism scale in athletes, Dan et al. (2005) and also the Martens competitive anxiety scale questionnaire completed by Wiley et al.Results: The correlation results showed that in group athletes, there was a positive and significant correlation between excessive worry about mistakes with competitive anxiety (r = 0.19), a positive and significant correlation between perceived coach pressure and competitive anxiety (r= 0.24). r) And a positive and significant correlation between perfectionism and competitive anxiety (r= 0.26). But there was no significant correlation between personal standards and perceived parental pressure with competitive anxiety. Also, the correlation results showed that in individual athletes, there was a positive correlation between personal standards and competitive anxiety (r= 0.22), excessive concern about mistakes with competitive anxiety positive, significant correlation (r= 0.17), positive and significant correlation between perceived coach pressure with competitive anxiety (r= 0.205) and positive and significant correlation between perfectionism with competitive anxiety (r= 0.21). But there was no significant correlation between perceived parental pressure and competitive anxiety.Conclusion: Results of multivariate regression showed that in group athletes, coach variables of perceived pressure and excessive worry about mistakes are the strongest variables for predicting competitive anxiety in group athletes, respectively. Also, the results of multivariate regression showed that in individual athletes, the variables of personal standards, perceived coach pressure and excessive worry about mistakes are the strongest variables to predict competitive anxiety in individual athletes (P<0.05).
Sport Sciences and Health Research
University of Tehran Press
2981-0205
12
v.
2
no.
2020
145
157
https://sshr.ut.ac.ir/article_86133_676ec200ac532681abf7937eebc8c1d7.pdf
dx.doi.org/10.22059/sshr.2020.86133
The comparison of selected kinetic factors during a cross-cutting maneuver in soccer players with athletics groin pain and healthy ones: Implications for injury prevention
Hamidreza
Naserpour
Ph.D. Student of Sport Biomechanics, Department of Biomechanic and Sports Injuries, Faculty of Physical Education and Sport Science, Kharazmi University, Tehran, Iran.
author
Elham
Shirzad
Department of Corrective Exercise and Sports Injuries, Faculty of Physical Education and Sport Science, University of Tehran, Tehran, Iran.
author
Mehdi
Khaleghi Tazji
Associate Professor, Department of Biomechanic and Sports Injuries, Faculty of physical education and sport science, Kharazmi University, Tehran, Iran.
author
Amir
Letafatkar
Assistant Professor, Department of Biomechanic and Sports Injuries, Faculty of physical education and sport science, Kharazmi University, Tehran, Iran.
author
text
article
2020
eng
Introduction: This study aimed to compare selected kinetic factors during a cross-cutting maneuver in soccer players with athletics groin pain (AGP) and healthy ones.Martials and Methods: Twenty-eight soccer players (healthy group (n=14) and AGP group (n=14)) who take part in the first and second division league took part in this study. A force plate at 1000 Hz sampling rate was used to evaluate the ground reaction force, rate of force development, vertical impulse and symmetry index during the cross-cutting maneuver. The MATLAB and ORIGIN PRO software were used to filter and process the force plate data. The independent sample t-test was used to compare healthy groups and AGP results.Results: The results showed the significant differences in the peak of ground reaction force (P=0.023), symmetry index (P=0.01), and rate of force development (P=0.031) in the medial-lateral direction of the dominant limb in a group with AGP. The peak of the vertical ground reaction force of the non-dominant limb was significantly higher in the AGP group (P=0.004).Conclusion: It seems that groin pain may change the kinetic profile, which puts the athletes at the potential risk of overuse injuries in the lower extremity. It is also recommended to utilize the output of the current study as an index for back to sports index, and the rehabilitation progress should be continued to reduce symptoms and recurrence of injury up to the proper symmetry.
Sport Sciences and Health Research
University of Tehran Press
2981-0205
12
v.
2
no.
2020
159
168
https://sshr.ut.ac.ir/article_86134_035878f1709d1a4f7d1896964f7d3b93.pdf
dx.doi.org/10.22059/sshr.2020.86134
Investigating the predictive role of psychological factors in the incidence of sports injuries (musculoskeletal) of elite male volleyball players
Alireza
kazeminasab
Sport science, Imam Reza International University, Mashhad, Islamic Republic of Iran
author
Reza
Aminzadeh
Sport science, Imam Reza International University, Mashhad, Islamic Republic of Iran
author
Nasser
Mohammad Rahimi
Sport science, Imam Reza International University, Mashhad, Islamic Republic of Iran
author
text
article
2020
eng
Introduction: This study aimed to investigate the predictive role of psychological factors in the incidence of sports injuries (musculoskeletal) of elite male volleyball players.Martials and Methods: This was a descriptive-correlational research study design. The study was conducted with 150 elite male volleyball players in the Premier League of Khorasan Razavi province in 2020. In order to collect data, three standard questionnaires including Sports Injuries Questionnaire (Esmaeili, 2014), Personality Traits Questionnaire [18], and Competitive State Anxiety Questionnaire (CSAI-2) Rainer and Martens (1990) were used. In order to analyze the data in this study, SPSS software version 23 was used.Results: The results show that competitive anxiety can explain sports injuries (musculoskeletal) in the first model. In the second model, when the somatic anxiety variable is added, competitive anxiety and somatic anxiety variables can explain sports injuries. In the final model, the factors of competitive anxiety, somatic anxiety, self-confidence, risk-taking, excitement, and aggression can explain sports injuries.Conclusion: It can be said that psychological factors play a role in the incidence of sports injuries (skeletal-muscular) of elite male volleyball players.
Sport Sciences and Health Research
University of Tehran Press
2981-0205
12
v.
2
no.
2020
169
177
https://sshr.ut.ac.ir/article_86135_a7a4fdbe2f0eb9e63512d7864ec8824a.pdf
dx.doi.org/10.22059/sshr.2020.86135
The effect of tactile feedback along with corrective exercises on the degree of thoracic kyphosis in hyperkyphosis individuals
Azadeh
Rahimi
PhD of sports injury and Corrective Exercises, Physical Education and Sport Sciences Faculty, University of Tehran, Tehran, Iran
author
Hooman
Minoonejad
Department of Health and Sports Medicine, Faculty of Physical Education and Sport Sciences, University of Tehran, Iran
author
Reza
Rajabi
Department of Health and Sports Medicine, Faculty of Physical Education and Sport Sciences, University of Tehran, Iran
author
text
article
2020
eng
Introduction: The musculoskeletal and support systems and biomechanical factors lead to tissue adaptations in the skeletal, musculoskeletal, and nervous systems, resulting in changes in the movement pattern. This study aimed to investigate the effect of tactile feedback along with corrective exercises on the degree of thoracic kyphosis in people with hyperkyphosis.Methods: Twenty patients with postural kyphosis greater than 42 were selected voluntarily and randomly divided into experimental and control groups. In the pretest and post test, the degree of kyphosis of both groups was measured using a flexible ruler. In the intervention phase, both groups performed corrective exercises for 8 weeks, 3 sessions per week, and each session for 30 to 45 min. The experimental group received tactile feedback, but the control group did not receive any feedback.Results: The results of the 2-factor analysis of variance showed that tactile feedback along with corrective exercises (D= -12%) compared to corrective exercises (D= -8%) led to a reduction in kyphosis in people with Hyperkyphosis (P= 0.018).Conclusion: It seems that tactile feedback with changes in sensory inputs can be an effective complement to corrective exercises to reduce the degree of kyphosis.
Sport Sciences and Health Research
University of Tehran Press
2981-0205
12
v.
2
no.
2020
179
187
https://sshr.ut.ac.ir/article_86129_737aa27e0401027921304bba2a4168c6.pdf
dx.doi.org/10.22059/sshr.2020.86129
The effect of lying on the stomach on the spine angles of 13-18-year-old students in Karaj
zahra
Keshtpour
Master of Pathology and Corrective Movements, Faculty of Physical Education and Sport Sciences, Islamic Azad University, Karaj Branch
author
Mohammad Ali
Soleyman Fallah
Assistant Professor, Faculty of Physical Education and Sports Sciences, Islamic Azad University, Karaj Branch
author
text
article
2020
eng
Introduction: The objective of the present study was to investigate the effect of lying on the stomach on the spine angles of 13-18-year-old students in Karaj.Martials and Methods: This study was quasi-experimental and comparative conducted by field method. For this purpose, 105 13-18-year-old students of girls' schools in District 3 of Karaj during the academic year 2020-2021, who were accustomed to lying on the stomachs, randomly participated in the study by convenience sampling method and based on the number of study hours per day, less than 1 h, between 1 and 2 h and more than 2 h placed in three groups. Research variables including angles of forward head, unequal shoulder, lumbar lordosis, dorsal kyphosis and scoliosis were assessed using standard tests with high validity and reliability. The data were analyzed using one-way analysis of variance and Bonferroni post hoc test at the significance level of 0.05.Results: A significant difference was between lumbar lordosis and forward head angle abnormalities among students who were less than 1 h and more than 2 h accustomed to lying on their stomachs (P<0.05). But this difference was not significant for variables of uneven (dropped) shoulder, dorsal kyphosis and scoliosis (P<0.05). The students who studied for more than 2 h a day while lying on their stomachs had abnormalities of lumbar lordosis and forward head angle.Conclusion: Lumbar and prefrontal lordosis abnormalities are common in students who study lying on their stomachs and repeat the condition for at least 2 h a day.
Sport Sciences and Health Research
University of Tehran Press
2981-0205
12
v.
2
no.
2020
189
196
https://sshr.ut.ac.ir/article_86136_f710589801d4ef0179103d4e93358d02.pdf
dx.doi.org/10.22059/sshr.2020.86136
The effectiveness of cognitive rehabilitation and physical exercise on locomotor movement skill of children with developmental coordination disorder
Ayoub
Hashemi
Department of Motor Behavior, Faculty of sports science, University of Tehran, Tehran. Iran
author
Robabeh
Rostami
Department of Motor Behavior, Faculty of Education and Psychology, Shiraz University, Shiraz, Iran
author
Habib
Hadianfard
Department of Clinical Psychology, Faculty of Education and Psychology, Shiraz University, Shiraz, Iran.
author
text
article
2020
eng
Introduction: The purpose of this study was to evaluate the effectiveness of cognitive rehabilitation and physical exercise on locomotor movement skill of children with developmental coordination disorder.Martials and Methods: The present study is a quasi-experimental study with a pre-posttest design with a control group. Eighty boys aged 6-10 years (mean age: 8.68±1.2) were selected from primary school students in Shiraz using multi-stage cluster sampling method and were randomly divided into three experimental (TDCS, Physical exercises and Combined group) and control groups. Developmental Coordination Disorder Questionnaire (DCDQ7), Raven Intelligence Test and Movement Assessment Battery for Children (MABC-2) were used to screen children. The Ulrich Gross Motor Skills Development Test (TGMD-2) was used to assess locomotor movement skills. Experimental groups performed the interventions for 8 weeks (3 sessions per week and 45 min per session). Paired t-test and analysis of covariance were used to analyze the data.Results: The results showed that the locomotor movement skill score in the groups of cognitive rehabilitation, physical exercise and combined intervention from the pre-test to post-test stages increased significantly (P<0.05). While in the control group no significant difference was observed (P>0.05). The results also showed that locomotor movement skill in the combined groups and physical exercise in the post-test were significantly higher than the cognitive rehabilitation and control groups (P<005).Conclusion: Concomitant use of cognitive rehabilitation-related interventions with physical exercise is more effective in improving locomotor movement skill in children with developmental coordination disorders.
Sport Sciences and Health Research
University of Tehran Press
2981-0205
12
v.
2
no.
2020
197
205
https://sshr.ut.ac.ir/article_86137_f70290fca4ef70b77eb69773e48aed22.pdf
dx.doi.org/10.22059/sshr.2020.86137
Development of norm for Adolescent Physical Literacy Questionnaire (APLQ) in Tehran
Mostafa
Mohammadzadeh
velenjak, daneshjoo BLVD,
19.
author
Mahmoud
Sheikh
University of Tehran
author
Davood
Hominian Sharif Abadi
University of Tehran
author
text
article
2020
eng
Introduction: Adolescents' physical literacy and physical activity influences their lifestyle behaviors and health-related readiness into adulthood. Lack of information about the state of physical literacy has led researchers to examine the state of physical literacy in adolescents in Tehran.Martials and Methods: The method of the present study was descriptive and performed in the 12-18 years adolescent in Tehran. The sample were 836 adolescents who selected by multi-stage cluster sampling from different areas of the Tehran. Inclusion criteria included having physical health, not having certain diseases and movement problems or regular drug use. Subjects' physical literacy was assessed using the adolescents' physical literacy questionnaire (APLQ). This questionnaire with three dimensions examines adolescents' physical literacy and has an internal consistency coefficient (0.951) and retest reliability (0.981).Results: The total mean scores of physical literacies in adolescents were 90.04 ± 17.12 and the desired norm was determined with a standard deviation of high and low (107.16-72.94). However, the mean scores for girls were about 85 and for boys 92, which shows a difference between the sexes and high ages.Conclusion: The results showed that adolescents' physical literacy scores in all dimensions increase with age; Also, the scores were higher in boys than girls in all dimensions. Similar results have been reported for differences in gender and age in the Physical Literacy of Canadian children [12]. The norm presented in this study can be a basis for measuring and comparing the levels of physical literacy of adolescents in Tehran.
Sport Sciences and Health Research
University of Tehran Press
2981-0205
12
v.
2
no.
2020
207
216
https://sshr.ut.ac.ir/article_86139_f7f8cd87c99fb8f52f6304f3d2ea683e.pdf
dx.doi.org/10.22059/sshr.2020.86139
The effect of the body type on the electrical activity of the abdominal muscles during gait
Rasool
Ferasat
Ph.D. student in Sport Biomechanics, Islamic Azad University, Central Tehran Branch, Tehran, Iran.
author
Heydar
Sadeghi
Professor, Department of Sport Biomechanics and Injuries, Faculty of Physical Education and Sport Sciences, University of Kharazmi, Tehran, Iran.
Professor, Department of Sport Biomechanics, Kinesiology Research Center, Kharazmi University, Tehran, Iran.
author
text
article
2020
eng
Introduction: Muscle performance could be influenced by physical features of the body. The purpose of this study was to investigate the effect of the body type on the electrical activity of the abdominal muscles during gait.Martials and Methods: Heath Carter somatotype method was used to determine body type. The performance of rectus abdominis muscle (RA), internal oblique muscle (IO) and external oblique muscle (EO) were recorded. The mean and the standard deviation were used for description of the data and ANOVA and post-hoc Tukey were utilized for comparison between three body types at the significance level of P<0.05.Results: The results showed that there is a significant difference in the root mean square (RMS) of EO and IO and the average percentage of that is higher in ENDO in comparison with the other two types. Also, the duration of electrical activity (DEA) was only significant for the IO between the endomorphs (ENDO), the mesomorphs (MESO) and the ectomorphs (ECTO) and its mean was higher for the ENDO.Conclusion: According to the findings of the study, we could claim that the difference in the performance pattern of the muscles in the abdominal area during gait is influenced by body type.
Sport Sciences and Health Research
University of Tehran Press
2981-0205
12
v.
2
no.
2020
227
233
https://sshr.ut.ac.ir/article_86140_d2cab7bfcb55b0189510c6a181afded7.pdf
dx.doi.org/10.22059/sshr.2020.86140
Comparison of kinematics and kinetics symmetry of lower limbs during running
Ali
Fatahi
department of Sports Biomechanics, central Tehran branch, Islamic Azad university, Tehran, Iran
author
Rozhin
molaviaan
department of Sports biomechanics, Central Tehran Branch, Islamic Azad university, tehran, Iran
author
text
article
2020
eng
Introduction: Symmetry and asymmetry of the limbs’ movement pattern during running is introduced as one of the main critical challenges of human locomotion. The aim of this study was to investigate kinematics and kinetics symmetry of lower limbs during running at a constant speed.Martials and Methods: The present study was conducted as a quasi-experimental study. Elite runner (age: 34.75±6.63 years) participated in this study. Running at constant speed was conducted by each subject at 2/5 m.s-1 on treadmill while kinematic (Raptor-4 motion analysis) and kinetic data (Force plate, Bertec) were captured at 150 Hz and 300 Hz, respectively. The internal joint moments in sagittal plane were represented in the joint-coordinate system and were calculated using a standard inverse-dynamics approach and were normalized by the subject’s body mass as well as running cycle over 101 time points. The normality and homogeneity of variances assumptions of the dependent variables was tested using Bartlett and Leven’s test. Independent t-tests were conducted to examine the symmetry of hip, knee and ankle moments between dominant and non-dominant joints during stance phase of running (P<0.05).Results: Results of the present study showed no significant difference exists between dominant and non-dominant lower joints regarding the peak moments of hip, knee and ankle in sagittal plane during stance phase (P>0.05) as well as between peak flexion angle of dominant and non-dominant hip, knee and ankle joints during running.Conclusion: Symmetry exists in lower joints sagittal moments and flexion angle during running at the constant speed. According to the results dominant and non- dominant lower joints play propulsive and absorbent roles cooperatively.
Sport Sciences and Health Research
University of Tehran Press
2981-0205
12
v.
2
no.
2020
217
225
https://sshr.ut.ac.ir/article_86142_a0d947a0c5340121c89e935e409bd112.pdf
dx.doi.org/10.22059/sshr.2020.86142
Qualitative study of effective biomedical factors in tendency of retired elite wrestlers to drug abuse; A grounded theory study
Mohammad
Khazaei
Department of Sport Psychology, Faculty of Physical Education and Sports Sciences, University of Tehran
author
Mohammad
Khabiri
Department of Sport Psychology, Faculty of Physical Education and Sports Sciences,University of Tehran
author
Alireza
Mohseni Tabrizi
Faculty of Social Studies, University of Tehran
author
text
article
2020
eng
Introduction: Retirement is one of the difficult events. Athletes should adapt to the difficult experiences and heighten a sense of worth. Drug abuse as a negative coping behavior is a painful reaction to retirement. The aim is to identify the factors influencing the tendency of retired elite wrestlers to drug abuse. With a biomedical approach, this phenomenon was investigated.Materials and Methods: Using the method of contextual theory and semi-structured in-depth qualitative interview technique, factors influencing the tendency of retired elite wrestlers to drug abuse were studied. The data analysis method was coding, done in three stages of open, selective and axial coding. The data are in a paradigm model.Results: Factors such as sexual needs, strenuous exercise and injury were taken as causal conditions; physical pain was taken as a mediating condition; and retirement age and first experience of drug abuse were taken as an intervening condition and physiological need and doping as contextual conditions. These factors created a paradigm model. Athletes' strategies for drug abuse are: leisure purposes, wider variety of drugs, continuity of drug use and finally compulsive drug use.Conclusion: The consequences of drug abuse were initially pleasant and positive, but with continued drug use, it had harmful consequences physically, psychologically and socially.
Sport Sciences and Health Research
University of Tehran Press
2981-0205
12
v.
2
no.
2020
135
144
https://sshr.ut.ac.ir/article_86144_80e4d72b54646c6791b3d483e371abe5.pdf
dx.doi.org/10.22059/sshr.2020.86144