Depends: Do you want to be in the guinness book of world records? Or do you just want to be fit? There is no requirement to do any, so you can start from there and work your way up. Seems like you might do 20 or so a few times a day..
Answered 4/26/2013
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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