对象与方法对象:上海体院82级田径专业普通班男生27人。方法:实验比较法。受试者在TL练习器上进行为期6周(每周3次)的定力半蹲(90度)训练,规定训练负荷分别为最大负荷的50%,70%,90%;组数2组,3组,4组;次数6次,9次,12次。实验前后测了受试者立定跳远,三级跳远,摸高,定力半蹲,杠铃半蹲以及(原摸高高度80%的)连续摸高等6项指 Objects and Methods Object: Shanghai Institute of Physical Education 82 track and field professional 27 regular boys. Method: Experimental comparison method. Subjects exercised a fixed strength squat (90 degrees) for 6 weeks (3 times a week) on a TL trainer and set the training load to 50%, 70% and 90% of the maximum load, respectively; , 3 groups, 4 groups; the number of 6 times, 9 times, 12 times. Before and after the test measured subjects standing long jump, triple jump, touch high, set the power squat, barbell squat and (the original height of 80%) continuous touch higher 6 fingers