ZMass Testo Boost One way to get around limiting muscles is to pre-exhuast them prior to working other muscle groups. For example, before lats on the rows, your biceps might feel fatigued. Using an exercise that isolates your lats first, a straight-arm pull-down for example, gives your lats a harder workout than your biceps. Exhausting your lats before doing rows will even out your muscle use and allow you to use your biceps to exhaustion.

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