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 ...

Every bro in the gym knows that “pump” feeling—veins spiking, muscles swelling, skin tight enough to crack. It’s more than vanity: The pump signals you’ve flooded your muscle with blood and ...

Building muscle isn't just for bodybuilders. Hypertrophy training is gaining attention because it can improve strength, ...

Make your muscles look a half inch bigger than they actually are by pumping them up with this bodybuilding trick. The pump happens in response to intense strength training. Muscular contractions cause ...

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 ...

If you’re looking to build muscle, it’s important to have patience and also be realistic about how long it will take. Different factors can determine your ability to gain (or not gain) muscle. Muscle ...