For men who don't exercise much, doing regular leg press workouts with three sets at a moderate weight helps reduce overall body fat and thigh fat more than a different workout method, probably because they do more total work.

For guys who don't usually work out, doing regular weightlifting cuts more overall body fat and thigh fat than a special pre-exhaustion method over 9 weeks, probably because you lift more total weight with the regular way.

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.

A lighter warm-up exercise before heavier lifting gives the same muscle and strength gains as just doing the heavy lifting alone, even though you're doing less overall work.

Whether you use machines that change resistance as you lift or keep the same weight all the way through, after 20 weeks of training, healthy men gain about the same strength and muscle size either way.

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.