How often should I run, and for how long, exactly? And of course, what the heck is a Gu? As I settled into a pace, I had another question in the back of my mind: how long does it take to get faster?

Building your fast-twitch muscle fibers can help you get stronger and faster. This type of muscle fiber is responsible for the fast, explosive movements used in activities like sprinting, jumping, and ...

Let’s be real: No matter how badly you want to hit your fitness goals or see results from your workouts, spending the entire day sweating isn't feasible for most folks—pro athletes, aside. That's ...

Your ACTN3 gene doesn’t guarantee power, but it helps explain it. Whether you carry the RARE Variant or not, fast-twitch muscle is trainable. Lift heavy, move violently, and express the speed written ...