Many treadmills are padded, making them a good option if you're overweight or are injury-prone (especially with knee issues) and want to decrease the impact.

许多跑步机都是平的，这让他们成为一个很好的选择如果你是超重或者是容易受伤的特别是有膝盖问题的，并且想要减小影响。

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The unshod runners' style causes more flex in the foot's springlike arch ankle and knee and engages more foot and calf muscles blunting the impact on the body and making for a more comfortable "ride."

赤足的姿势引起了足部海面拱体、踝骨和膝盖更大的弯曲，更多地利用了足部和腿肚上的肌肉的力量，从而减弱了冲击对人体产生的影响，使人跑起来更舒服些。

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As your foot strikes the ground, your knee should be slightly flexed so that it can bend naturally on impact.

当脚接触地面时，您的膝关节应该略微弯曲，一旦受力的冲击，可以自然地进一步弯曲。

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The 20-something athlete hurt his knee running track five years ago so he switched to disc golf, a lower impact game.

VOA: standard.2010.08.03

Vogel said Granger's absence in the second half was precautionary and that he wasn't worried about any long-term impact to Granger's knee.

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Striker Eduardo da Silva, playing because of the knee injury suffered by Robin van Persie playing for Holland during the week, made little impact and his strike partner Adebayor looked less than convincing with two headed chances.

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Gough may not play every match because of the knee problem that saw him retire from Test cricket last year, but Flower still expects him to make an impact.

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