Effects of the Loaded Leg Extension Exercise on Muscle Strength of Lower Extremities and Balance of the Middle-aged and the Elderly

For probing into the influences of the loaded leg extension exercise on the middle-aged and the elderly's muscle strength of lower extremities and balance ability,this paper took 50 Nanjing community citizens aged from 56 to 72 as research objects,carried on 12 weeks loaded leg extension exercise,determined and compared the changes of lower extremities before and after the exercises.The result shows that after 12 weeks trainings,muscle strength of lower extremities and balance ability of middle-aged and the elderly in movement group are remarkablely enhanced.The findings indicate that the loaded leg extension exercise which is an effective approach for the middle-aged and the elderly to improve their muscle strength of lower extremities and balance is worth implementing and further spreading.