To contract muscle, requires coordination between your brain and your nervous system. Brain says contract; nervous system sends a signal; muscles move.
As the set progresses, the nervous system can no longer recruit any more muscle fibers to contract.
Every time this happens, the body is asked to adapt, thereby forming new neurological pathways to the muscle and, therefore, a greater percentage of muscles can fire at once.
Although strength and size are not synonymous, making improvements and periodizing strength can help with optimal growth.
Get out of your comfort zone and GROW!

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