Mario Denis

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When a body builder increase the volume of is muscles's, does is brain must increase the electrical signal to contract the muscle's.

Is the brain need to addapt and become more powerful electrically. For instance if at the beginning of is training he was lifting 100 kg and after many years of training he can lift 200kg, does is brain deliver the same amount of energy to lift both charge?
Maybe silly question but I'm thinking of it for a week now :)
Thank you