2 doctors weighed in:

I want to build up his muscles. He works out regularly at the gym and eats a very high protein diet?

2 doctors weighed in
Dr. Martin Morell
Internal Medicine - Rheumatology
1 doctor agrees

In brief: Muscles

Grow with adequate resistance exercises, followed by a period of rest.
The breakdown and healing promotes growth, in presence of adequate diet.

In brief: Muscles

Grow with adequate resistance exercises, followed by a period of rest.
The breakdown and healing promotes growth, in presence of adequate diet.
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