Browse evidence-based analysis of health-related claims and assertions
Doing a heavy set of arm curls followed by lighter ones without resting can make you stronger in one-rep max and static strength, just like doing only heavy curls.
Causal
Doing a tough set of arm curls followed by lighter sets without resting can make your biceps grow just as much as doing only heavy or only light curls over 8 weeks.
Rest-pause training helps you lift heavier without making your muscles bigger—so maybe your nervous system gets better at using your muscles, not just your muscles getting bigger.
Mechanistic
Measuring thigh muscle thickness with ultrasound near the top and middle of the thigh is a good way to see if your muscles are growing from training—but measuring near the knee might not show it.
Descriptive
The barbell squat max is a good way to tell if one training method makes you stronger than another—even if you do the same total number of reps and sets.
Quantitative
You don’t need to train every day—just twice a week for two months can make your upper and middle thighs bigger, as long as you do enough total work.
If you do the same total amount of work, using drop sets won’t make your muscles bigger or stronger than doing regular sets over two months.
Even though rest-pause training helps you lift heavier, it doesn’t make your muscles bigger than regular training—meaning strength and muscle growth might be controlled by different things.
The lower part of your thigh doesn’t grow as much from weight training as the upper and middle parts—even if you train hard and use fancy techniques.
Lifting weights just twice a week for two months is enough to make the upper and middle parts of your thighs bigger—even if you change how you do the sets, as long as you do the same total work.
Rest-pause training might help you lift a little heavier than regular training, but the difference is small, and we can’t be sure it matters much in real life because the study had few participants.
If you do the same total number of reps and sets, fancy techniques like drop sets or rest-pause won’t make your muscles bigger than regular training—your muscles grow the same no matter how you structure the sets.
The lower part of the thigh doesn't get noticeably bigger after 8 weeks of any of these training styles, even if the upper and middle parts do—meaning muscles don't grow evenly everywhere.
Whether you use rest-pause, drop sets, or regular sets, as long as you do the same total amount of work, your thigh muscles grow about the same size after 8 weeks of training.
If you're already experienced with lifting weights, doing drop sets (lowering the weight after failure) doesn't help you get stronger than doing regular sets, as long as you do the same total amount of work.
For guys who already lift weights, doing short bursts of heavy lifts with brief rests in between can help them lift a little more weight after 8 weeks than doing regular sets, even if they do the same total amount of work.
The official advice to rest 30–90 seconds between sets might be outdated — newer data suggest resting a bit longer (over a minute) could help your arms and legs grow a little better.
You can build muscle just fine whether you rest for 30 seconds or 4 minutes between sets — the exact rest time isn’t a make-or-break factor.
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.
Resting longer between sets lets you lift heavier or do more reps overall, and that extra work might be why your muscles grow a little more — not because of hormones or anything else.
Even though short rests make your body release more hormones like testosterone right after lifting, that doesn’t help you build more muscle — longer rests work just as well or better.
We don’t know if resting longer between sets helps people who already lift weights, older adults, or muscles in the chest and back — there just isn’t enough research yet.
If you're new to lifting weights, resting a bit longer between sets might help your legs grow a little more, but it won't make much difference for your arms or overall muscle mass.
Whether you push your muscles to complete exhaustion or stop a few reps short doesn’t change how much rest time between sets affects muscle growth.