Where you feel the most resistance during a workout doesn't change how much your muscles grow, as long as you move through the same range.

If a muscle works best when it's stretched out, it grows more when you do full movements. But if it doesn't rely on that stretched position, how far you move doesn't really change how much it grows.

When people lift weights through a full motion vs. just part of the motion, the muscles might look like they grow more in one case—but that could just be because the weight feels heavier at different points, not because the muscle is stretched more. So we can’t be sure if stretching the muscle is what’s causing the growth.

Not all muscles grow the same way when you move through different ranges—some might need bigger movements than others. So, telling everyone to do the same type of lift might not work for every muscle.

Doing partial-range weight exercises with a longer muscle stretch can build arm and thigh muscles just as well as doing full-range exercises, as long as you’ve been training for a while and do it for 12 weeks.

When you stretch your muscles fully during workouts, the ends of the muscles grow more than the middle parts — the stretch makes the muscle ends bulk up more than the center.