نشریه مطالعات وضعیت بدنی و آسیب های ورزشی
پیاپی 1 (تابستان 1402)

Balance is one of the basic factors of sports and proper balance increases the efficiency of athletes. The aim of this study was to compare the balance of beach with indoor volleyball athletes.

The present study is a quasi-experimental study. For this purpose and according to the research criteria, a total of 100 male professional athletes were selected as the research sample, and in two groups of indoor volleyball (n = 50) with body mass index (20.51+2.45), age (16.02=1.42), training history (5.42–1.26) and beach volleyball (n = 50) with body mass index (20.51–1.80). Age (15.86+1.52), training history (5.161.31). Y test was used to evaluate the balance. Data analysis was performed by SPSS 24 software at the significant level of "P=0.05."

The results of the research showed that there is a significant difference between the average value of the dynamic balance variable between the two beach volleyball and indoor volleyball groups, and beach volleyball has obtained better scores in the balance test. "P=0.01"

The balance of beach volleyball players in this research was much better than the balance of indoor volleyball players. Therefore, coaches of different sports can perform some exercises on object surfaces to improve the balance of their athletes. Also, coaches can use these levels for pre-season training where athletes need more preparation to continue competing.

This study aimed to investigate the effect of the auditory external intervention on support leg movement patterns and shooting skills of elite futsal players.

21 elite futsal players aged 21.8 ± 2.6 years based on inclusion criteria were selected. Selected lower limb kinematics and shooting skills were evaluated with and without auditory external intervention conditions. The lower limb kinematic, ball velocity, and the ball entered position to the goal, recorded by a three-dimensional motion analysis. To compare the participant's performance between baseline and verbal external intervention, we used the measure repeated method for data analysis.

The results showed that there was a significant difference between baseline position and auditory external intervention at the initial contact of hip and knee angles and Peak knee abduction moments (p <.001).

In general, it seems that providing a cognitive load during a shooting task, could significantly change the biomechanics of the support leg that may predispose participants to injury conditions.

proprioception is the sense by which a person can understand the position and movement of body parts. Pelvic Lateral tilt has various consequences such as back pain, impaired  .muscle function, but few studies have investigated its consequences The purpose of this study was to Compare lumbar position sense in students with and without lateral pelvic tilt

In this study, 11 students with pelvic lateral tilt and 15 healthy students participated in the study. (Healthy group: age (year): 17.56±0.75, Weight (kg): 56.87±8.56, height (cm): 159.67±7.51 and lateral Pelvic tilt group: age (year): 17.98±0.63, Weight (kg): 57.97±5.2, Height (cm): 161.32±6.5). using a goniometer and photogrammetric method, Lumbar reposition error in four directions of flexion, extension, left lateral flexion and right lateral flexion was recorded. The independence-samples t test was employed to analyze the data. The p-value=0.05 was regarded statistically significant.

No statistically significant difference was found between the two groups with respect to reposition sense error for four directions of flexion, extension, left lateral flexion and right lateral flexion(P >0.05).

Given that no statistically significant difference was observed between students with lateral pelvic tilt and healthy students. One of the reasons for the lack of significance may be due to the low severity of the lateral tilt. Therefore, further studies need to be conducted to determine the difference in proprioception in students with pelvic lateral tilt and healthy individuals.

The aim of the present study was to compare the effect of six weeks of core stability training on bosuball and balance board on balance, speed and range of motion of the ankle in adolescent boys.

In this quasi-experimental study, 30 adolescent boys were purposefully and accessibly selected as subjects and were randomly divided into three groups:10 in the balance board training group,10 in the bosuball training group, and10 in the control group.The training program consisted of six weeks of core stability training in two experimental groups, bosuball and balance board .24 hours before the pre-test and after the implementation of the training protocol, all subjects in the three groups of Y test were performed to assess balance, 36-meter running test to assess speed and measure ankle range of motion. K-S test was used to evaluate the normality of the data, Levin test was used to determine the homogeneity of variances, and one-way ANOVA analysis was used to analyze the data, and Bonferroni test was used to determine the mean pair difference.

Based on the results and findings of the research on post-test scores, the exercises of the bosuball group and the balance board in the factors of balance, speed and range of motion of the ankle, showed a significant difference with the control group.

The results of this study showed that core stability training on bosuball and balance board improves balance, speed and range of motion factors of adolescent boys.

Kayak Riders involves repetitive stress movements, and most of the injuries are overuse. Therefore, the aim of this study was to determine the electromyographic activity and the amount of fatigue of selected shoulder muscles during 2 km rowing.

This is descriptive and quasi-experimental study and the sampling method is purposeful. The statistical sample was eight female national rower who were selected according to the criteria for entering and leaving the research. For test, the 2-kilometer Kayak ergometer was used. Initially, the MVIC test was used to normalize the results. Then, recording the level of muscle activity was done by Surface Electromyography (16 Channel, manufactured by Bayamed Iran). For data analysis, ANOVA with repeated measure design with a significant level of 0.05 and SPSS software version 22 was used.

The results showed that the distance of rowing 2 km had a significant effect on the electromyographic activity of Anterior Deltoid(P≤0.025), Biceps Brachii(P≤0.001), Triceps Brachii(P≤0.041) and Pectoralis major (P≤0.001). There was a significant effect on the fatigue rate of Anterior Deltoid(P≤0.001), Biceps Brachii(P≤0.001), Triceps Brachii(P≤0.049) and Pectoralis major (P≤0.001).

The results of this study show that 2 km rowing has a risk factor for injury in the shoulder girdle structure.The obtained results can be used to design a suitable program to prevent injury and improve of the kayak.

Nowadays, volleyball is one of the most popular sports. Injury in sports is inevitable. Therefore, this study aimed to compare the injuries of the elite volleyball players of the Iranian national team and the players working in the Italian league.

The subjects of this study included two 15 member nodes consisting of the Iranian men’s national volleyball team and elite players working in the Italian Premier league. In this study, the injury report form that is available on the website of the World Federation (FIVB) as the standard injury report form has been used

the result showed that there was no significant difference between the distribution of injury based on playing post injured area cause of injury and severity of injury in the two groups of Iran and Italy. The power receiver players in both the Iran (30.8%) and Italy (53%) team suffered the most injury. In Iranian players, the lumbar region, while in Italian players, the ankle region was the most common injury that was reported. Tendon tears are the most common type of injury in Iranians (30.8%) and in Italian players dislocations and partial dislocations, tendon tears, and ligament tears together with 23.1% have been among the most common types of injuries in this group. injuries due to overuse are the most common injuries In the Iranian team with 77% and in the Italy team with 30.8% non-contact injuries are also among the most frequent injuries in the Italy team with 23.1% while this type of injury in the Iranian team is 7.7%.

coaches in the Iran and Italy Italian teams should implement injury prevention programs based on the area and type of common injuries among players to reduce losses from injuries.

Low back pain is experienced by at least once in 80% of people. Short iliotibal band is considered with low back pain. According to the mentioned cases, our aim in this study was to compare the immediate effect of dry needling and ischemic massage on the pain of people with chronic non-specific low back pain with short iliotibal band.

Leven test was used to evaluate the homogeneity of variance. Also, to evaluate the results related to persistence in the research hypotheses, the statistical test of analysis of variance of repeated measures in each group was used and then to examine the intra-group and intergroup differences, dependent and independent t-tests were used. The significance level of all tests was considered 0.05. All analyzes were performed using SPSS software version 26.

The results of post hoc test also showed that there was no significant difference between different groups in both variables of pain and functional disability.

The results of this study showed that both treatments are effective in reducing the numerical extent of pain intensity and functional disability. However, there was no significant difference between these two treatments. These results are consistent with other studies.

The COVID-19 pandemic has created the largest disruption of education systems in history among teachers who taught remotely .The use of hand held devices (HHD) such as mobile phones, tablets have increased dramatically among teachers which can increased lead musculoskeletal pain disorders Therefore, The purpose of this study is to investigate musculoskeletal disorders to Upper Cross Syndrome and the duration of online teaching during the COVID-19 between Musculoskeletal Disorders and Upper Cross Syndrome with duration of Teachers’ online teaching during COVID-19 pandemic.

The sample population consisted of 40 females. The duration of using hand held devices has been questioned, Nordic questionnaire was used to determine the musculoskeletal disorders. The photogrammetry method was used to determine the round-shoulder and forward-head angles. the hypokyphosis was measured by a flexible ruler. Data was analyzed using SPSS software version 24.

The results showed a significant positive relationship between hyper kyphosis abnormality and duration of cellphone usage. a significant relationship was found between duration of social media usage and forward head. There was a positive relationship between the duration of cellphone usage and rounded shoulder. In addition, a significant and positive relationship was found between the duration of social media usage and musculoskeletal disorders in the neck, shoulders, back, and wrists.

Distance learning, especially during COVID-19 pandemic, has exacerbated musculoskeletal disorders and postural abnormalities, so that increasing the duration of cyberspace can increases abnormalities and pain.