مجله بیومکانیک ورزشی
سال هفتم شماره 1 (بهار 1400)

 Football activities may be directly related to the playing position of the players on the field; so, football players develop their specific physical characteristics based on the demands of individual positions. This study aimed to investigate the biomechanical and anthropometric variables of football players according to the playing position.

 This review study reviewed Google Scholar, PubMed and Science Direct search engines for articles related to the keywords from 1996 to 2020.

 According to the reviewed articles, it was found that biomechanical and anthropometric variables in football players are different according to the playing position. 

It seems that biomechanical and anthropometric variables can have a direct impact on the performance of players during the game, so special attention to these variables in the field of talent identification and selection of football players in different playing positions should be considered.

 This study aimed to Compare parametric indices of anthropometric and biomechanical characteristics of female basketball, volleyball, and handball players.

 This research is purposive comparative-descriptive study. A total of 100 female students (35 handball players, 37 volleyball players, and 28 basketball players) participated in this study. The normality of the data distribution was examined using the Kolmogorov-Smirnov test. The Mean±SD and percentage rank to describe the information, multiple correlation coefficient to reduce the overlapping data, and analysis of the main components of the data to determine the leading indicators of anthropometric and biomechanical characteristics of female handball, volleyball, and basketball players and ANOVA was used to compare the corresponding leading indices in different age groups.

 Ten parameters for female handball and volleyball players and nine parameters for female basketball players were highlighted as the leading indicators. Head width, leg length, ankle width, scapular fat for basketball and handball players, biceps and weight for handball and volleyball players, abdominal fat, leg length for volleyball and basketball players, and height introduced as the leading common indicators among all groups of players. The results related to the variance extracted in each of the main components of anthropometric features after rotation showed that the main parameters related to anthropometric characteristics in female handball players are: height, weight, knee-to-ground height, head width, Head circumference, waist circumference, leg length, ankle width, scapular fat, and biceps fat; in female volleyball players are: height, weight, trunk width at the navel, sitting pelvis width, elbow circumference, knee circumference, foot arc circumference, leg length, biceps fat, triceps fat; in female basketball players are: height, elbow circumference, head width, trunk circumference at chest level, trunk circumference at navel level, leg length, ankle width, scapular fat, and abdominal fat; and in players of the three groups of athletes are: height, knee-to-ground height, elbow circumference, head circumference, waist circumference, trunk circumference at chest level, scapular fat and maximum forearm circumference.

 The height is the leading standard index between different female handball, volleyball, and basketball players. Most of the anthropometric characteristics are various, related to the type of sport. Also, the biomechanical characteristics vary according to the unique skills in each discipline. In some sports, the biomechanical factors vary due to the features of the common sport and the design of specific training programs. Every sport needs to evaluate and study the anthropometric and biomechanical aspects of individuals.

 Perform repetitive movements or long-term positioning causes adaptations in muscles and jointsand it can cause various disorders. To correct it, it is necessary to correct the movement pattern and use exercises to return to the desired muscle and joint position. The aim of this study was to investigate The effect of comprehensive corrective exercises on posture of the wushu athletes with upper cross syndrome.

 The method of the present study is quasi-experimental with pre-test and post-test. The statistical population of this study included wushu men living in Kerman province with at least 3 years of sports experience. To this end, 30 Wooshakar males with forward Head, forward shoulder and kyphosis malalignment participated voluntarily in this study. A randomized placebo group was divided into two control groups and experimental were divided. Experimental group was selected for correction exercises for 10 weeks and 3 sessions per week for 20 to 60 minutes, while the control group did not receive any training program during this period. The evaluation of forward Head and forward shoulder and kyphosis angle were performed in two stages. Paired t-test and covariance analysis were used for data analysis. SPSS software was used at the significance level (P≤0.05).

 The results showed that the mean forward Head and forward shoulder and kyphosis angle of the subjects decreased after participating in the corrective training program (P=0.001).

 Based on the results of this study, it is recommended to use the selected corrective exercise program to reduce the amount of head forward, shoulder forward, kyphosis and improve the upper limb function of athletes prone to the upper cross syndrome. Therefore, in addition to reducing the mentioned complications, it can also affect their performance.

 The purpose of this study was to investigate the effect of eight weeks of selected exercises in water on pain and balance of nurses with chronic back pain.

 This semi-experimental study was carried out on 30 nurses working in Sanandaj city hospitals. Selected exercises in water for eight weeks, three sessions per week, which was carried out progressively and with the practice of central stability exercises on the experimental group. To assess the pain and balance of the patients in the pre and post test tests, both groups used the standard questionnaire of Quebec, FBT test, berg balance test. Independent and dependent t-test was used to analyze the data. The significance level was considered as P<0.05.

 There was a significant difference between the mean scores of pain and the static and dynamic balance in the experimental and control groups, respectively, with a significant decrease and significant increase in the pain (P=0.001) and static (P=0.001) and dynamic (P=0.001) balance variables in the experimental group.

 Regarding the effectiveness of selected exercises in water on the pain and balance of nurses with non-specific chronic low back pain, it is recommended to design the training protocols for patients with Special attention should be given to the chronic pain, to the practice of water therapy (and to the importance of taking core stability of the workout in these exercises).

 Commenting on the return to sport after some injury is in doubt. The aim of this study was to investigate the relationship between test scores of movement control and a history of knee and ankle injury in active females.

 Statistical population of this study was 57 active females (22 healthy subjects, 19 subjects with a history of previous knee injury and 16 subjects with a history of previous ankle injury) with age ranging from 18 to 25 years old. In order to evaluate subjects, were used to the movement control test set consists of nine separate questions. Total maximum points in the subtests were 40 points, which less point was a better result in these tests. For statistical analysis, Kolmogorov-Smirnov test, Levene test, analysis of variance (ANOVA) and Tukey test were used (Significant at 95% and the alpha less than or equal 0.05, and using of the SPSS software v. 22).

 The results of this study showed test scores of movement control earned by females with a history of ankle and knee injuries was significantly different with the healthy females (P=0.001).Compare scores of subjects with contact and non-contact injuries with healthy women showed that contact injury had higher scores than those who are non-contact injuries. The differences between the groups with any of these injuries are significant with no injury group (P=0.001).Cut-off point for this test was about 15.5.

 The scores of functional movement screening give a detailed model of the injury prevention to coaches in order to predict the risk of lower extremity injuries in athletes. So its need to coaches in order to the prevention of sports injuries, use the functional movement screening tests. To measure the performance level of the athletes before the start of the season, in order to identified athletes that are at risk of injury, in order to improve their capabilities.

 With age, the problems associated with loss of balance, followed by decreased muscle strength and physical function, increase. Therefore, the elderly are exposed to serious injuries. Therefore, the aim of the present study was to investigate the effect of Cawthorne Cooksey training on balance and lower limb strength in the elderly.

 Subjects including 24 elderly men and women participated in this study voluntarily and were divided into experimental groups (n=‌12) and control (n=‌12). The design of the present study was pre-test and post-test. Cawthorne Cooksey training were performed for eight weeks, three sessions per week and each session for 60 minutes. The main variables were balance and lower limb strength, and the leaf test was used to assess balance and the rise and fall test was used for lower limb strength. One-way covariance and dependent t-test in SPSS software version 26 were used to analyze the pre-test and post-test results and compare the groups.

 The results of this study showed that the balance in the experimental group had a significant improvement compared to the control group (P=‌0.001). There was also a significant difference in lower limb strength in the experimental group compared to the control (P=‌0.002).

 According to the findings of this study, these exercises positively affect balance and lower limb strength in the elderly. Due to the decline in physical function of the elderly, performing these exercises increases the level of physical function and quality of life of the elderly.