cardio duration

Discussion in 'Fitness & Nutrition' started by TheMustafa, Jul 9, 2005.

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  1. TheMustafa

    TheMustafa hook 'em

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    i've heard its bad to do cardio for longer than an hour, as you start burning muscle mass after that point. true or false?
     
  2. What if you're a fatty? :hsughno:
     
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