This study compared the effect the angle of the knee had on the ease of rising from a chair. The subjects were asked to rise using four different angles of the knee. One of the angles was chosen by the subject as the one most comfortable to use when rising. Three other trials were performed placing the subject in 95, 105, and 120 degrees of knee flexion. EMG readings were integrated and recorded for each trial. Data was collected from 48 healthy subjects who had no restrictions that limited them from rising. The difference in muscular activity needed to rise using the varying angles was not significant. A strong positive correlation was found between the voltage values for each of the four angles, suggesting that subjects tend to be consistent with the amount of muscular activity they need to rise. A significant difference was found between gender and the angle of the knee chosen by the subjects to rise, with males choosing a smaller angle than females.
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