Lifting weights until you can't do another rep doesn't help you build more muscle than stopping before you hit total exhaustion—so you don't need to push yourself to the absolute limit to get the best results.

You don’t need to push your muscles to absolute exhaustion to grow them—working them pretty hard (but not all the way to failure) might give you just as much muscle growth as going all out.

Whether you lift light weights with lots of reps or heavy weights with few reps—so long as you push until you can’t do another rep—you’ll build muscle about the same amount.

Pushing yourself harder during weightlifting by stopping later (more than 25% slower than your fastest rep) doesn’t help you build more muscle than stopping a bit earlier (20–25% slower)—the difference is so tiny it doesn’t really matter.

If young men lift weights with the same total effort—whether they use heavy weights with long breaks or light weights with short breaks—they’ll still grow about the same amount of muscle. So, different ways of lifting can both work.

You don’t need to be sore after a workout to build muscle—some workouts cause less soreness but still make you just as strong and muscular as the super-painful ones.