Doing more sets of weightlifting in one session can help you build bigger muscles and get stronger, but after a certain point, doing even more sets doesn’t help much—around 2 sets is enough for strength, and 11 sets is enough for muscle growth.

Lifting weights more often each week helps you build bigger muscles and get stronger, but after a certain point, you don’t gain much extra strength—though your muscles can still grow. If you keep the same total amount of lifting, doing it in more frequent, lighter sessions helps strength more than muscle size.

Doing more sets in a workout helps you get stronger and bigger, but after a certain point, extra sets don’t help much—especially for strength. You hit your sweet spot for strength with fewer sets than you need for muscle growth.

Doing more sets in your weight workouts might actually make you gain less muscle—each extra set could slightly reduce your muscle growth, so more isn’t always better.

When you lift weights and push yourself almost to the point of not being able to do another rep, you’re more likely to build bigger muscles than if you stop earlier — even if you’re lifting the same weight or doing the same number of sets.

If you're a young guy lifting weights more often each week, you'll build more muscle and get stronger—but after a while, your strength stops improving fast, while your muscles keep growing a bit longer.