Building muscle depends on several factors and isn't something that'll happen overnight after just one workout.

When you’ve pushed through an intense workout, you might have sore muscles to go along with that surge of accomplishment. Maybe it’s those quads and hammies after leg day or triceps and biceps after ...

MIT scientists find that motor neuron growth increased significantly over 5 days in response to biochemical (left) and mechanical (right) signals related to exercise. The green ball represents cluster ...