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Home » » Fitness & Sports » Strength & Conditioning » P90X2® X2 Chest + Back + Balance & X2 Ab Ripper - Tony Horton (Beachbody)
P90X2® X2 Chest + Back + Balance & X2 Ab Ripper - Tony Horton (Beachbody)
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Using an unstable surface will increase your core strength and balance while working to define your chest and back muscles.
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