Eccentric exercise focuses on movements, or phases of a movement, that lengthen the muscles. Some examples of eccentric exercise include lowering into a squat or lowering into a press-up. In contrast, ...

What Are Eccentric and Concentric Contractions? Eccentric contractions occur when a muscle lengthens under load, such as lowering a dumbbell during a biceps curl. Concentric contractions happen when ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." THERE'S NOT A ton of cheat codes when it comes to building muscular strength and size. There's no magic ...

Fascinating study compares seven commonly prescribed exercises for hamstring strengthening, particularly for a return-to-sport after injury.

What Is the Psoas Muscle? The psoas (pronounced so-ezz) muscles are two large muscles in your lower back. You have one on either side of your spine. They're the main muscular connection between your ...

Muscle contraction is the tightening, shortening, or lengthening of muscles when you do some activity. It can happen when you hold or pick up something, or when you stretch or exercise with weights.

Full-body stretching is a great way to become more flexible, increase mobility, and decrease pain. While there are a variety of moves that can help address certain issues (like lower back pain), a ...

Tight hip flexors, especially a deep muscle called the psoas, can silently stress your spine. Here's why this muscle deserves more attention—and how to strengthen it. Lower back pain is often blamed ...