Doing a simple exercise right before a harder one with no break doesn't make you stronger or build more muscle better than just doing regular workouts, according to current research.

Two different ways of lifting weights—pre-exhaustion and traditional—both help you get stronger and last longer during exercise about the same amount.

Doing all your sets for one exercise before switching to the next might build a tiny bit more muscle than mixing exercises up, but it's such a small difference we can't be sure it's real.

A shorter, easier leg workout gives the same muscle and strength gains as a longer, harder one for beginners, even though you're doing less overall work.

When people who don't exercise regularly get tired out before doing certain workouts, they can't do as many repeats afterward—about 25% fewer.

For guys who don't usually work out, doing a special type of leg exercise first leads to bigger strength gains than regular training over 9 weeks, probably because it targets muscles more specifically and adds extra low-effort reps.