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Insanity Max: 30 - Max Out Strength(2014)
Your arms, shoulders, chest, and core will be toast after this upper-body-focused, "45 seconds on, 15 seconds off" Tabata-style routine.
December 2, 2014
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Your arms, shoulders, chest, and core will be toast after this upper-body-focused, "45 seconds on, 15 seconds off" Tabata-style routine.
