Bullworker
Sporting Goods Denver
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The most significant breakthrough in fitness came when Dr. E.A. Muller and Dr. Th. Hettinger discovered maximum muscle growth can be attained by exerting 60% of existing muscle strength against a superior resistance for only 7 seconds once a day using a remarkable fitness technique known as isometrics. The study at the Max Planck Institute consisted of over 200 experiments over a ten-year period.
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Sporting Goods(623)695-1103 (623)-695-1103 +16236951103