جستجوی مقالات مرتبط با کلیدواژه "joint angle" در نشریات گروه "تربیت بدنی"

Foot orthoses are often used to correct altered gait patterns. The purpose of this study was to investigate how foot orthoses can modify the magnitude of three dimensional ankle, knee, and hip joints kinematics during stance phase of walking in children with flexible flat feet. Three dimensional kinematic data were collected from 15 male children (age: 10.3 ± 1.5 years) suffering from flexible flat feet. In order to obtain the kinematics data, a Vicon motion capture system was used. Arch support foot orthoses were used as an intervention. ANOVA repeated measure test was used for statistical analysis (α =0.05). The results of data analysis showed that shoe insole can decrease the peak knee (P0.05). The foot orthoses used in this study were observed to have positive systematic effects on kinematic data during stance phase of walking. Therefore, using of this orthoses was recommended for male children with flexible flat feet. Moreover, the findings of this study may be used as a guidance for future researches in this field

Fatigue is an integral part of sports that can affect athletic performance. The aim of this study was to determine the effect of shoulder girdle muscle fatigue on ground reaction force, Elbow and shoulder angle, and accuracy in the penalty for handball throwing.
Handball Player 10 healthy male subjects with no history of injury in the shoulder (mean age 9/18 years, weight 79/72 kg, height 179 cm, 6/5 year membership in the team) voluntarily participated in this study. Subjects, a total of 16 times before and 16 times after fatigue, with full respect for the law, the goals set at the gate penalty shot run. Ground reaction force, Angle of elbow and shoulder, and accuracy launch of the two-phase (phase of preparation for throwing and phase of the release of the ball) were recorded before and after fatigue.
Results showed ground reaction force and accuracy significant difference before and after fatigue, but showed no significant effect of fatigue on elbow flexion and shoulder flexion and abduction.
Due to the elite subjects muscle fatigue is generally not have a significant effect on postural control, angles and angular velocity, however, the reaction force and accuracy showed significant difference before and after fatigue, and ultimately affect the performance of athletes and competition results.