The following is an excerpt from the new Men's Health training guide 90-Day Transformation Challenge: Arms. In one volume, you'll get all the tools you need—information, a nutrition guide, and ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." When it comes to weightlifting, people hit the gym for a plethora of reasons. Maybe you want to improve ...

As you bite into a crisp apple, your jaw muscle contracts, allowing you to grind the fruit between your teeth. When you climb a flight of stairs, your gluteus maximus (or "glutes") push your body ...

The back consists of large, complex muscles that support your trunk and spine. There are many types of back muscles, and they are all essential, helping you walk, bend, twist, and hold your body ...

Large muscles like the hamstrings and glutes tend to get all the glory on leg day, but don't sleep on a very important group of muscles: the calves. The largest and most visible part of the calf is ...

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 ...

When it comes to weightlifting, people hit the gym for a plethora of reasons. Maybe you want to improve your overall health, lose weight, or cross-train for your sport. Two of the most common workout ...

When it comes to weightlifting, people hit the gym for a plethora of reasons. Maybe you want to improve your overall health, lose weight, or cross-train for your sport. Two of the most common workout ...