3. You work to exhaustion
If the biggest musclehead in the gym has taught us anything, it’s that doing lots and lots of sets and reps to the point of total collapse (he can’t even muster his signature grunt!) is the best way to build muscle. More than 20 total sets per muscle group, or more than 15 reps per set, may leave your muscles swollen (hence the ego-enhancing “pump”), but it will be from inflammation, not actual muscle growth. Any weight that allows that much work is too light to cause substantial growth, and you’ll reap no lasting gains.
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