Uphill running forces you to drive your arms harder than you do when running on flat ground, so you'll improve your upper body strength.
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。
He had been running uphill a long way...
他已经跑了一段很长的上坡路。
He had been running uphill a long way.
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