Add Yahoo as a preferred source to see more of our stories on Google. Luis Alvarez/Getty Images Have you ever worked out and watched your muscles grow before your very eyes? You probably have, and ...

Have you ever finished a workout and noticed your muscles looking fuller, tighter and more defined? It is what the fitness enthusiasts call a muscle pump. This temporary swelling happens when blood ...

In the movie Pumping Iron, Arnold Schwarzenegger famously described the feeling of the pump in the gym as… Well, he said it ...

Chasing a muscle pump in the gym is great for Instagram. But what’s the science behind that temporary flex and how does it ...

View post: I Needed a Shoe That Could Handle Sprints and Box Jumps. This Under Armour Pair Was the Standout Winner If you’ve been lifting long enough, you’ve likely hit the dreaded plateau—your ...

There are few feelings better than catching a glimpse of yourself in the mirror after a tough workout and flexing that well-earned muscle pump. In fact, it’s such a satisfying feeling that it’s ...

Hypertrophy, the scientific term for the enlargement of muscle fibers, may not hold the top spot on the list of training priorities for some runners. Many of us (sometimes begrudgingly) cross-train to ...