Showing 7 results for Hosseini
Seyed Hossein Hosseinimehr, Mehrdad Anbarian,
Volume 16, Issue 16 (12-2018)
Abstract
The purpose of this study was to compare the effect of shoulder abduction angles, dominant and non-dominant arm and external loading on co-contraction ratio during arm abduction in scapular plane in overhead athletes and non-athletes. 10 swimmers, 10 handball players and 10 tennis players and ten non-athletes voluntarily participated in this study. Electromyography activity of shoulder muscles (middle and anterior deltoid; upper, middle and lower trapezius; infraspinatus, serratus anterior and latissimus dorsi) during dynamic and static arm abduction in 3 different angles (0-45º in 1second and holding it for 3 seconds, 0-90º in 2 seconds and holding it for 3 seconds, 0-135º in 1 second and holding it for 3 seconds) was recorded for dominant and non-dominant arm in loading and non-loading conditions. Co-contraction ratio of shoulder muscles was calculated for both groups. Findings indicated external loading, shoulder dominance and abduction angles had significant effect on shoulder muscles co-contraction ratio during (0-45º, 0-90º, 0-135º) and holding shoulder elevation in scapular plane (45º, 90º, 135º), also there was significant difference in shoulder muscles co-contraction ratio among four groups during and holding elevation in scapular plane (p≤0.05). Significant differences in shoulder muscles co-contraction ratio among athletes group and between athletes and non-athletes may be related to sport demands and adaptation to exercises and extensive use of upper limb as well.
L Ghanbari, M.h Alizadeh, H Minoonejad, S.h Hosseini,
Volume 17, Issue 17 (4-2019)
Abstract
Considering the important role of the scapula in the glenohumeral joint movements, its position on the thorax can affect the function of the joint. Therefore, the purpose of this study was to investigate the predictive relationship of the strength and glenohumeral rotation range of motion (ROM) with scapular dyskinesis (SD) in female athletes with
overhead-throwing pattern. The present study was a descriptive-correlational research on 60 athletic female in volleyball, handball, basketball and badminton. The Lateral scapular slide test was used to examine SD. the dynamometer and goniometer were used to measure the strength and glenohumeral rotation ROM respectively. Data were analyzed using Spearman correlation and multiple regression tests. The correlation coefficients between SD and the glenohumeral internal rotation ROM (r=-0.734; p=0.000), the glenohumeral external rotation ROM (r=0.693; p=0.001), the glenohumeral internal rotation strength (r=0.674; p=0.005) and the glenohumeral external rotation strength (r=-0.719; p=0.001) were significant. Analysis of the research model showed that about one-third (30.1%) of total changes in SD were dependent on the independent variables mentioned in this regression model. therefore, screening of athletes with overhead-throwing pattern must be taken into consideration in order to recognize SD, and participate in corrective exercises to increase the glenohumeral internal rotation ROM and the glenohumeral external rotator muscles strength.
Soroush Shah Hosseini, Amir Hossein Barati, Mohammad Hossein Nasermeli, Mohsen Moradi,
Volume 18, Issue 20 (11-2020)
Abstract
Given that more than 50 percent of patellofemoral pain syndrome include of overuse injuries, the aim of this study was to compare the vastus medialis muscle activity in individuals with patellofemoral pain syndrome after a period of strength and flexibility training with and without the electrophysiological feedback. A total of 30 subjects (15 men and 15 women) participated in this study. Subjects were divided into three group's control, therapeutic and therapeutic with electrophysiological feedback. One-way ANOVA was used to compare the activity of vastus medialis muscle in between groups. The results of this study showed that there was a significant difference between the groups in the activity of the vastus medialis muscle activity (P <0.05). The results of Tukey's post hoc test for intra-group comparisons showed that there was a significant difference between the control group with the therapeutic group (P = 0.024), the control group with the therapeutic group and the electrophysiological feedback (P=0.028) and the therapeutic group with the therapeutic group and the electrophysiological feedback (P<0.001). Conclusion: Regarding the results of this study, therapeutic exercises with electrophysiological feedback have a greater effect on the activity of vastus medialis than the therapeutic group in patients with patellofemoral pain syndrome.
Mahboubeh Alemzadeh, Seyed Abdolali Hosseini, Mehrdad Anbarian, Safoura Ghasemi,
Volume 19, Issue 22 (12-2021)
Abstract
Nowadays, light and minimal shoes have been used by athletes in various types of sports activities in order to be in a position close to barefoot position. But its effect on the electrical activity of the shank muscles is not well understood. Therefore, the aim of this study was to investigate the electrical activity of selected shank muscles when using minimalist shoes, normal shoes and barefoot during single-leg landing. For this purpose, 15 healthy boys with a mean age of 23.53± 2.64 years who had no history of any abnormalities participated in this study. Electromyographic variables of tibialis anterior, peroneus longus, peroneus brevis, gastrocnemius medialis, gastrocnemius lateralis and soleus muscles of subjects' superior legs were examined in two phases; pre-activity and eccentric. Analysis of Variance (ANOVA) with repeated measures tests were used for data analysis. The significance level was set at α=0.05. The results showed that in both phases, the activity of selected muscles in the shank of individuals during the one-legged landing movement in the barefoot position was more than the minimalist shoes and when using the minimalist shoes was more than normal shoes (P<0.05); Since minimalist shoes have been shown to have moderate muscle activation patterns, between barefoot and casual shoes, it is recommended to use it to prevent sports injuries and also to strengthen the shank and leg muscles in environments where it is not possible to move barefoot.
Alireza Hosseini, Dr Mostafa Zareei, Fariborz Hovanloo,
Volume 19, Issue 22 (12-2021)
Abstract
Wrestling is a high contact sport with a significant risk of injuries. Identifying risk factors can help preventing wrestler’s injuries. little is known about the contribution of balance and proprioception to sport injuries. The purpose of this study was to find out the relationship between dynamic balance and knee proprioception and the injuries in young wrestler.72 young wrestlers from Tehran primer league participated in this study. Before the start of season, proprioception was measured at 30°, 60° and 90° knee flexion using the Biodex Isokinetic pro 4 system. Dynamic balance was measured by Biodex balance system. Injuries were recorded by the team's medical staff. Logistic regression modeling indicated that there is no significant relation between Dynamic balance and proprioception of knee at 30 and 60 and at 90 degree and musculoskeletal injuries. Balance and proprioception testing, as performed in the present study, cannot be recommended as a screening test to predict injuries in young male wrestler.
Seyed Mohammad Hosseini, Seyed Vahid Seyedazizi, Sahar Bala Khiyavi, Ali Keshtiaray,
Volume 21, Issue 26 (12-2023)
Abstract
The researchers conducted the present study with the aim of investigating the pain and muscle disorders of patients with covid-19 with people who have experienced it. The research was applied and comparative. Samples were calculated using G-power of 303 people, and sports teachers were excluded from the research. The Nordic questionnaire was provided to Ardabil education and training employees after the investigation, the number of people with one year of identification and the number of 113 people with the age range of 30 to 45 years reported no reduction. Then, musculoskeletal disorders of 9 body areas in both groups were evaluated using descriptive statistics and chi-square test at a significance level of 0.01. The muscle pain of the affected group was significantly (P<0.01) higher than that of the healthy group, and also based on the chi-square test, the amount of back and neck pain was 52% and 45%, respectively, in affected people compared to other organs. It was more meaningful. (P<0.01) noticed that there was no significant difference between the pain and discomfort of different organs in the non-observed group. Corona patients may experience pain, and the cause of it in the Nordic questionnaire, in addition to physical abnormalities and excessive muscle disease, can be from Corona disease; Therefore, the Nordic questionnaire should be used.
Javid Shah Hosseini, Arezoo Eskandari, Mohamad Fashi,
Volume 21, Issue 26 (12-2023)
Abstract
Using standard tests to assess maximum strength is very important where resistance training planning is based individually. This study aimed to estimate 1 repetition maximum of active women based on the Rating of Perceived and to provide a special predictive equation. 30 healthy women (20-35 years; BMI: 26.32 ± 3.34 kg/m2) performed one repetition of chest press with eyes close and then chose a number to determine the intensity by Rating of Perceived Exertion scale of 6-20. In order to evaluate the validity of the designed equation, one repetition of the maximum number of subjects was calculated by Brzycki equation, and correlation was determined by Pearson's correlation method. There was a high correlation between the present study equation and the Brzycki method (r=0.89) and also after cross validations (r=0.91). No significant difference was observed between the results of the present equation and the results of Berzyski's equation. It seems that the equation of the present study” 1RM={(20-RPE" /" 40) +1 }× weight/2 " can provide a reliable estimate for 1 repetition maximum of chest press in healthy women.
