Browse evidence-based analysis of health-related claims and assertions
When you lift more, you get stronger faster than you get bigger — volume seems to have a bigger impact on strength than on muscle size.
Correlational
Not all weightlifting exercises are equal — exercises that work multiple muscles at once (like squats) should count as half a set when predicting muscle growth, because they help but aren’t the main target.
Quantitative
How often you train matters more for getting stronger than for getting bigger muscles — muscle size doesn’t seem to care much, but strength does.
Muscle size and strength don’t grow the same way when you lift more — strength hits a ceiling faster than muscle size, meaning they’re probably controlled by different biological processes.
When counting weightlifting sets, it matters whether the exercise directly targets the muscle or just helps it indirectly — counting indirect sets as half helps predict muscle growth and strength better than just adding up all sets.
Lifting weights more often each week can help you get stronger, but after a certain number of sessions, doing even more doesn’t help much more.
How often you lift each week doesn’t seem to matter much for building muscle — as long as you do the same total number of sets, spreading them out or grouping them doesn’t make a big difference.
Lifting more weights each week makes you stronger, but the gains slow down faster than muscle growth — after a certain point, adding more sets gives you very little extra strength.
Doing more sets of weightlifting each week helps you build more muscle, but after a certain point, doing even more sets doesn't help much more.
When you do more sets, you feel it way more than your muscles or strength show it — your brain notices the effort before your body shows physical signs.
Checking your muscle size right after a workout won’t tell you how good your workout was — it’ll look normal by the next day no matter how hard you went.
Descriptive
Even doing a ton of leg exercises doesn’t cause lasting muscle damage or fluid buildup — at least not in guys who’ve been lifting for years.
How hard you feel you worked or how recovered you feel doesn’t match up with how swollen your muscles look — you can feel wiped out even if your muscles aren’t actually swollen.
The more sets you do, the harder you feel you worked and the less recovered you feel afterward — especially if you do a lot.
Even after a super hard leg workout, the inside of the thigh muscles don’t show signs of lasting damage or fluid buildup — they look normal again by the next day.
Even after doing a ton of squats and leg presses, guys can still lift the same heavy weight the next day — their strength doesn’t drop.
Even after a really hard leg workout, guys’ thighs don’t stay swollen for more than a day — they go back to normal by the next day.
Doing more sets of leg exercises makes you lift more total weight in one session, but doesn’t make you stronger right after or cause your muscles to swell longer.
After doing a lot of leg exercises in one workout, guys who are used to lifting feel less recovered the next day or two than after doing fewer sets.
When guys who regularly lift weights do more sets of squats and leg exercises in one workout, they feel like they worked harder afterward.
In trained individuals, higher resistance training volumes lead to concomitant increases in both muscle hypertrophy and maximal strength.
Assertion
Acute muscle swelling responses following a single resistance training session are not representative of swelling responses observed after prolonged, repeated training programs.
Comparison
Progressive exposure to identical resistance training stimuli results in progressive reductions in muscle damage markers and accelerated recovery kinetics.
Trained individuals experience heightened muscle damage and swelling responses when exposed to novel training stimuli, despite prior training experience.