earticle

영어

This study compares and analyzes the cranking between the newly developed hand cycle prototype and the high-end hand cycle that are sold on the market for the disabled athletes. Comparison analysis of upper extremity’s muscle activity in cranking by crank angle is the key analysis variables. For this study, 10 male subjects, who had the same type of disability. 10 infrared camera was utilized to acquire the subjects kinematic data and muscle activity of biceps brachii, brachioradialis, deltoid, pectoralis major, and triceps brachii which are the main muscles of upper limb used in cranking was measured with Delsys inc. SPSS 16 was used for a statistical verification and the difference of the sports biomechanical variable between RX and the prototype was verified by utilizing pared samples t-test. The significance level at the time of the experiment was a=.05. The prototype showed higher maximal and mean muscle activity in biceps brachii, brachioradialis, and deltoid than those of RX. Though, the data showed that there was no significant difference except for brachioradialis. On the other hand, the RX showed higher maximal and mean muscle activity in pectoralis major and triceps brachii than those of the prototype but also there was no significant difference. The results show that there is a need to design the hand cycle crank in a curve shape to lessen the muscle fatigue that is measured the highest between the angle of 180 to 195. In addition, comparative analysis between the existing data and the data of modified crank must be researched since the hand cycle cranking is one of the main variables in performance enhancement.