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Just as the title says.

I am thinking if the air cushion in some sport shoes can reduce the pressure to my knees.

Now I wear running shoes which have almost nothing, I adjust the pressure by running really slow.

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I don't think the air cushion in sport shoes will really help reduce the pressure on your knees. The impact forces during are several magnitudes higher than during walking, a small air bubble isn't going to make you float :-) – Ivo Flipse May 12 '11 at 9:45

Cushioning may help prevent additional stress to your knee but it wont make the pain go away.

Check this thread for help on removing your knee pain while running. Should I run along?

Also I recommend going to a specialty running shoe store to ensure you have the right type of shoe for your feet. Good luck and good running.

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It very much depends on your gait. That's why there's different types of running shoes. You should go to a running shop – rmx May 13 '11 at 15:50

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