对身体有冲击性的运动最好,无非是蹦跳。落地轻姿势好不会伤膝盖。run in place, long jump, side jump, box jump, knee tuck jump, rope jump, high knee...
健身的好处是全身锻炼。不是胳膊疼了炼胳膊,腿疼了治腿