shaolin monks do it for about 5 hours? i dunno but i think that's what the documentary guy said
anyway, i tried it awhile back and held it for 4 minutes before i nearly fell on my face
this **** will have you pouring sweat in a minute and it's painful too
they say because it creates micro fractures in turn it will strengthen the femur
ever try it? if not try it and see how long you can hold in
it will greatly improve your balance
this guy explains it so you have the proper form
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