送交者: true 于 2010-07-01, 20:49:04:
回答: 谢谢。强度不能太大了，我的年龄告诉我。 由 梅子 于 2010-07-01, 20:39:45:
2 your exercise intensity should be decided by the percentage of your maximum heart rate as:
Beginner or low fitness level: 50% to 60%
Intermediate or average fitness level: 60% to 70%
Advanced or high fitness level: 75% to 85%