Showing 6 results for Mit
Mrs Mostafa Zarei,
Volume 14, Issue 11 (4-2016)
Abstract
The incidence of lower extremity injuries in young soccer players is high, but the risk factors for injuries are unknown. Thus, the aim of this study was to investigate relationship between static lower extremity alignment and injuries in adolescent soccer players. Four teams (78 players) playing at Tehran Asia vision adolescence primer league (14-16 years old) participated in this study. Before entering the season Navicular drop, quadriceps angle, knee hyperextension, genu varum and body mass index was measured. Players were monitored for musculoskeletal injuries through a season (7-month period). overall injury rate was 8.7 injuries/1000 player-hours (95% CI=7.01-10.10). Logistic regression modeling indicated that Navicular drop in preferred foot (OR=4.5; p=0.001), Q angel in preferred leg (OR=2.77; p=0.048), and genu varum (OR=4.06; p=0.021) were all associated with injuries but no association was found in other parameters. Players had an approximately 4.5 times greater chance of suffering a lower extremity injury if they have Navicular drop greater than 1.5 centimeter and approximately 2.77 times greater chance of suffering injury if they have Q angel greater than 15.5 degrees. These findings show that multiple anatomic measures such as Navicular drop, genu varum and Q angle can predict soccer players’ injuries. Results of this study are valuable for coaches and players for injury prevention.
Dr Mostafa Zarei,
Volume 14, Issue 12 (10-2016)
Abstract
The incidence of lower extremity injuries in young soccer players is high, but the risk factors for injuries are unknown. Thus, the aim of this study was to investigate relationship between static lower extremity alignment and injuries in adolescent soccer players. Four teams (78 players) playing at Tehran Asia vision adolescence primer league (14-16 years old) participated in this study. Before entering the season Navicular drop, quadriceps angle, knee hyperextension, genu varum and body mass index was measured. Players were monitored for musculoskeletal injuries through a season (7-month period). overall injury rate was 8.7 injuries/1000 player-hours (95% CI=7.01-10.10). Logistic regression modeling indicated that Navicular drop in preferred foot (OR=4.5; p=0.001), Q angel in preferred leg (OR=2.77; p=0.048), and genu varum (OR=4.06; p=0.021) were all associated with injuries but no association was found in other parameters. Players had an approximately 3.47 times greater chance of suffering a lower extremity injury if they have Navicular drop greater than 1.5 centimeter and approximately 2.77 times greater chance of suffering injury if they have Q angel greater than 15.5 degrees. These findings show that multiple anatomic measures such as Navicular drop, genu varum and Q angle can predict soccer players’ injuries. Results of this study are valuable for coaches and players for injury prevention.
Marjan Asadi, Heydar Sadeghi,
Volume 19, Issue 21 (9-2021)
Abstract
Knowledge of the relationship between performance and range of motion, helping to design training programs, comply of individual with the needs of children is, therefore, The aim of research the relationship between some of the lower extremity range of motion and biomechanical parameters of the boys was performed. Hundred students in this study were randomly selected. After measuring the range of motion of lower extremity, test speed, power, balance and agility of the subjects were recorded. By descriptive statistics to determine the mean and standard deviation of the method of multiple correlations to assess the relationship between the selected range of motion and biomechanical parameters of subjects were used. Hip flexion by speed, hip abduction and knee flexion by balance and hip flexion, hyper adduction and ankle dorsi flexion significant positive correlation by the agility, the rate of hip and knee flexion by power a significant negative correlation and with other lower extremity range motion parameters showed a significant positive association. According to the research findings, seem to be characteristics of the children lower extremity range of motion and identify performance indicators for various athletic field, can be used.
Dr Ali Barzegari, Dr Saeid Naghibi, Samaneh Safayi, Dr Mohammadhasan Dashti Khovidaki, Dr Anahita Salehi,
Volume 20, Issue 24 (3-2023)
Abstract
The purpose of this study was to compare two methods of aerobic exercise on the levels of SOD and TNF-α in the heart tissue of diabetic rats. 40 male Wistar rats aged ten weeks were randomly divided into four groups of 10: healthy control, diabetes, diabetes+MIT and diabetes+HIT. The moderate intensity training group ran 5 sessions per week for 8 weeks on the treadmill for 60 minutes at a speed of 25 meters per minute, and the high intensity training group also 5 sessions per week for 8 weeks with a training time of 60 minutes and at a speed of 34 meters per minute. The heart tissue of rats was examined to determine the amount of changes in SOD and TNF-α using ELISA method. To investigate the difference between groups of variables, one-way analysis of variance and Tukey's post hoc statistical tests were used at the significance level of P≥0.05. The results showed that there was a significant difference in the levels of TNF-α and SOD in the heart tissue of rats among the four research groups (P≤0.001). The levels of TNF-α in the HIT training group also showed a significant decrease compared to the diabetic group (P=0.001), While these changes in the MIT exercise group compared to the diabetes group was a non-significant decrease (P=0.117), the amount of SOD levels between the MIT and HIT exercise groups also showed a significant increase compared to the diabetic group (P=0.001). It seems, aerobic exercise with different intensities can improve SOD and TNF-α levels. Although the intensity of exercise in periodic exercise has been an effective factor in changing the values of both variables.
Ms Faezeh Gholami, Dr Manouchehr Haydari,
Volume 21, Issue 25 (9-2023)
Abstract
Mental fatigue is usually caused by long-term cognitive activities; in a way that reduces cognitive performance and leads to changes in functional activities. Therefore, the purpose of this study was to investigate the effect of a session of Swedish relaxation massage and meditation in controlling mental fatigue on reactive balance and Lower extremity function of amateur athletes. In this study, 16 female physical education athletes were purposefully selected as a sample based on the study entry criteria, and were subjected to mental fatigue protocol (45 minutes of cognitive activity (Stroop test)), Swedish relaxation massage (30 minutes) and meditation (30 minutes) with a time interval of 48 hours. Reactive balance was evaluated with Y test with automatic lights and, Lower extremity function was evaluated with single hop for distance, triple hop for distance, meter-6 and hop crossover-triple distance tests. Repeated analysis of variance test was used to check intra-group changes.The findings showed that there is a significant difference between the average scores of reactive balance and lower limb performance of the subjects when comparing the post-test of mental fatigue with the post-test of massage and meditation (P<0.05). Also, there is a significant difference between the subjects' scores comparing massage and meditation for reactive balance and body function (P<0.05).In order to prevent sports injuries in athletes, Swedish relaxation massage and meditation can be used as an intervention to speed up the recovery of mental fatigue and improve reactive balance and body function.
Mohsen Mohammadnia Ahmadi, Razieh Heidari,
Volume 21, Issue 26 (12-2023)
Abstract
Nowadays, the use of traditional herbal remedies for the prevention and treatment of diseases along with exercise has become very popular. The aim of this study was to investigate acute effect of hydro alcoholic extract of melissa officinalis on metabolic rate, substrate oxidation and salivary cortisol during and after high-intensity interval exercise (HIIE) in inactive women. Ten inactive women were selected based on criteria (BMI 22.28±0.60 kg/m2). Individuals participated in two separate sessions. In the first session, extract of melissa officinalis (500 mg) were intake one hour before HIIE. In the second session, the placebo (500 mg of starch) was intake. The HIIE program consisted of 11 alternates (1-minute with 90% vVO2max followed by 2-minute rest intervals with 60% vVO2max). Pre, during and after HIIE, respiratory gases was measured using the respiratory gas analyzer and was used to calculate metabolic rate (Energy Expenditure, VO2) and substrate oxidation (Fat oxidation, Respiratory Exchange Ratio (RER)). Heart rate monitored by polar sensor. Salivary cortisol after collection was measured by chemiluminescence method. Based on results, there was no significant difference in VO2 (P =0.51), Fat Oxidation (P= 0.9), RER (P= 0.76), Heart rate (P= 0.42) and energy expenditure (P=0.6) between melissa officinalis and placebo intake. Also, there was no significant difference in salivary cortisol (P= 0.15). Generally, hydro alcoholic extract of melissa officinalis supplement intake along HIIE has no effect on metabolic rate, substrate oxidation and cortisol level in inactive women.
