RE: PYRAMID WORKOUT QUESTION
Actually, depending on what type of pile your carpet has, the stability ball may roll a bit less than it would on bare floor (if you have longer pile carpet). That would make it a bit easier to control. If you want to make it more challenging, make sure your ball is fully inflated (but not overinflated). To make things a bit easier, deflate the ball a bit.
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5k racewalking PR: 34:42 (11/26/11)