deltreefitness
New member
Is it really possible to focus on sections of the muscle fibers?  Aren't muscles not just stimulated or not?  I thought adding incline just incorporated more shoulders into the exercise.  Even so I still do them.... out of ignorance really.  I mean if you can focus on upper pectoral or lower couldn't you do the same for say, the bicep?
				
			 
				
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