I did a 30-day push-up challenge and here's what happened
 

http://img-s-msn-com.akamaized.net/t...6&q=60&o=f&l=fThere's a reason military sergeants demand pushups as a form of punishment. They are effing hard, can k**ck even the fittest off their feetâ??okay, toesâ??and seem to be designed to reveal weaknesses. So much...

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