How fast-twitch and slow-twitch muscle fibres influence your performance – plus, how genetics and training play a part.

What's the first thing that comes to mind when you think about the words twitch and muscle? Spasms, perhaps. You'd hardly be alone in thinking that. But when it comes to fitness, it's most commonly ...

Add Yahoo as a preferred source to see more of our stories on Google. santypan/Getty Images You probably already know that running is a stellar form of exercise. It provides a host of health-boosting ...

You probably already know that running is a stellar form of exercise. It provides a host of health-boosting benefits, including improved heart function, boosted mood, and reduced risk of a bunch of ...