使您的上身有劲:跑坡道迫使您摆臂比跑平地时更加用力,因此,您的上身力量可以提高。
Hills. If you run or bike or walk for cardio, you'll want to incorporate hills (after the first month or two of doing it at an easy pace on flat ground).如果你通过跑步,骑车或者走路来锻炼心脏,那么结合斜坡,效果更好(通常在平地上锻炼一两个月以后进行。)
This is, of course, assuming they don't suffocate, say, if you dropped them from 40,000 feet, and that they land on relatively flat ground (nothing pointy or the like).当然,前提是它们不会因窒息而死,(如果你从40000英尺让猫们掉下来它们会因缺氧被憋死)另外一个前提是:它们着陆的地面要相对平坦。