You can only build muscle at a certain rate. I decided to try and track how much muscle I gained in a year using full body workouts, 4 days per week. See the results here.
How Much Muscle Can You Gain?
How much muscle mass do you think I can realistically, naturally
How Much Muscle Can You Gain In a Year Naturally?
How Much Muscle Can You Grow?
Mass gain: how much muscle can you realistically expect?
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Here's How Much Muscle You Can Really Gain Naturally (with a
How Much Muscle Can You Gain?