Abstract:

BACKGROUND: Balanced development growth of muscle power in junior period plays an important role in human development.
OBJECTIVE: To explore the biomechanical rule of muscle power development in junior period.
METHODS: Dynamic muscle power test of flexor and extensor muscles of bilateral shoulders and hip was performed in 30 boys and 30 females through the use of Kintech isokinetic system, with a test speed of 60 (°) / s and test times for stretch six times.
RESULTS AND CONCLUSION: The relative peak torque of flexor and extensor muscle of hip and shoulder joints in all involved subjects was gradually decreased with the increase of test speed and was gradually increased with the increasing age. Under different test speeds, the relative peak torque of flexor and extensor muscle of hip and shoulder joints was relatively greater in boys than in girls (P < 0.05), but there was no significant difference in relative peak torque of flexor and extensor muscle of hip and shoulder joints between boys and girls.