Have you heard of fast-twitch and slow-twitch muscle fibers? These are the two types of muscle that are responsible for all your gains in the gym. And depending on how you train — and even your own ...

Muscular endurance tests can help you gauge the effectiveness of your workout and provide clues about your overall physical fitness. When it comes to measuring progress in the weight room, muscular ...

For fitness-minded folks, muscle testing can sound pretty intriguing. But it turns out that it has little to do with fitness...or even muscles. On a basic level, muscle testing looks at a muscle and ...

Add Yahoo as a preferred source to see more of our stories on Google. The chest press is one of the "big five" and is an effective basic exercise for muscle building Photo: Getty Images/Westend61 A ...

Your muscles move when nerve signals from the brain tell them to get to work. Electromyography (EMG), a diagnostic test, measures how well your muscles respond to those signals. Movement is a complex ...

A muscular, athletic body radiates health and vitality. But how can you really build muscle effectively? FITBOOK takes a closer look at the five most important exercises and shows you how you can ...