Training for Peak Performance: Strength, Speed, Power, Jumping Ability, Endurance, Coordination, Agility, Flexibility and Stretching, Technique, Mental Toughness, and Sports Nutrition
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by leo_uqz » Oct 11, 2009 23:42
by Thomas Kurz » Oct 23, 2009 21:21
leo_uqz wrote:I want to know how much time I have to contract
leo_uqz wrote:how many times I have to do it in the excersices.
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