Doing gentle weight training slowly twice a week for 13 weeks makes young men's muscles about 7% bigger and 33% stronger, almost as much as regular heavy lifting, which made muscles 9% bigger and 41%...

Doing slow, low-intensity weight training twice a week for about three months can build muscle and strength almost as well as fast, heavy lifting in young men who don't normally exercise.

Slow, low-effort weight training keeps your muscles working hard and starves them of oxygen more than fast, heavy lifting, which might help build muscle and strength just as well by stressing the muscles in a different way.

If you're a guy who's already used to lifting weights, doing fewer reps with heavier weights and longer rests might boost your bench press more than doing lots of reps with lighter weights and short breaks — at least over 8 weeks.

Lifting heavy weights fewer times, three days a week for a month, helps young active men build more muscle and get stronger than lifting lighter weights many times.

If you lift light weights super slowly and hold the tension, your thighs get stronger and bigger after 12 weeks—but if you lift the same light weights at a normal pace, you won’t see much change.