当你腿部变得更强壮时，增加箱子的高度和重量，锻炼时可以增加肌肉的张力。
As you become stronger, use higher boxes and add weight, which creates more tension.
经常跑，并在逐渐在奔跑中增加时长和强度，你会获得相应的健康收益：减少体脂，增加最大摄氧量，改善肌肉张力。
By running more often, you reap the same fitness benefits you get when you boost the duration and intensity of any one run: reduced body fat, increased VO2 Max, and improved muscle tone.
经常跑，并在逐渐在奔跑中增加时长和强度，你会获得相应的健康收益：减少体脂，增加最大摄氧量，改善肌肉张力。
By running more often, you reap the same fitness benefits you get when you boost the duration and intensity of any one run: reduced body fat, increased VO2 Max, and improved muscle tone.
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