Doing more workout sets might help your muscles grow just a little bit more—even if the difference isn’t big enough to say for sure it’s not just random chance.

Doing more sets at the gym than you're used to—like going from 18 to 33 sets a week per muscle group—doesn’t make your muscles grow significantly more, even though you might see a little more growth overall.

If you're already strength training, doing more sets and reps doesn't always mean your arms and shoulders will grow much bigger—other things like rest, diet, and genetics also play a big role.

Getting stronger from lifting weights doesn’t always mean your muscles are getting bigger—and vice versa. Strength and size don’t go hand in hand.

Adding just one or two extra sets of exercise per week probably won’t make your muscles grow any more, because everyone’s body reacts differently and it’s hard to measure tiny changes accurately.

Lifting free weights and using weight machines both help you build muscle in about the same way—neither one is clearly better than the other.