Resting more than a minute and a half between sets doesn’t seem to help you build more muscle than resting for about a minute — it’s not worth the extra time.

Taking a bit more time to rest between weightlifting sets might help your arms and thighs grow a tiny bit more, but the difference is so small it might not even matter in real life.

Inter-set rest intervals exceeding 60 seconds promote greater skeletal muscle hypertrophy compared to rest intervals of 60 seconds or less, when training volume and intensity are matched.

Resting for 1 to 3 minutes between sets doesn’t seem to build more muscle than resting for 1 to 1.5 minutes — the difference is too small to matter in practice.

Taking longer breaks between sets of weightlifting doesn't hurt your muscle growth—you might even grow more muscle with longer breaks than with very short ones.

Resting more than a minute and a half between sets doesn’t seem to help your muscles grow any more than resting for about a minute — after that, extra rest doesn’t add benefit.