2009
08.28
08.28
Charles Dao tests Jim Adams on a 45 second 12 inch step up step down. This is a sprint type of exercise that is recruiting fast twitch muscle fibers in order to build speed and quickness.
Livin' By Doin'
Charles Dao tests Jim Adams on a 45 second 12 inch step up step down. This is a sprint type of exercise that is recruiting fast twitch muscle fibers in order to build speed and quickness.
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