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Work your traps and delts to total exhaustion.
Sure, it's an awkward move, but it'll cook your core and shoulders.
Get rid of your man-boobs and start muscling up your chest.
Strengthen your glutes, quads, and back.
Blast your quads, calves, and hamstrings to build lean mass.
The 38-year-old music star's 'get out and do shit' workout routine.
Skip these bodyweight moves that can wreck your joints.
Here's how to make the most of your downtime between sets.