Why is protein synthesis important for worked out muscles?

Question

I always here people saying that people working out need to consume protein b/c it helps with repairing the microtears and it creates an environment that stimulates protein synthesis. Our bodies have a finite number of muscle cells, right? So, does the protein synthesis create an environment where you are repairing the damage done to many muscle fibers? I would so appreciate someone breaking down how protein synthesis really works...in laymens terms. Thanks ya'll.

Answer 1

People who do exercise do get bigger muscle mass. The muscle cells get bigger. All the increases require more protein synthesis.