Working your muscles through a fuller range of motion during weight training might make them grow a little bigger than training with a shorter range, but it’s not always clear or the same for every...

If you're someone who's been lifting weights for a while, doing the same amount of heavy training over 9 weeks will make your thigh muscles grow by about half a centimeter — whether you spread your workouts over 2 or 4 days a week.

Some people get much bigger and stronger from weight training than others—even when they do the exact same workouts—because everyone’s body responds differently to exercise.

People who start working out with thinner thigh muscles tend to grow them bigger faster than those who start with thicker thighs—but how thick your muscles are at the beginning doesn’t tell you much about how much they’ll grow overall.

Whether you do strength exercises with your muscles stretched out or more shortened, your muscles grow about the same amount in different parts — no big difference.

Lifting weights twice a week for six weeks — whether using heavier or lighter weights — helps young, healthy guys build leg muscle just about the same amount, compared to not training at all.