THE BODY IS a complex machine. Your corporeal form houses over 600 muscles, all working together to help you perform your best every day. Fitness pros tend to organize all of these into different ...

Developing bigger pectoral muscles, or "pecs," is one of the most common goals for anyone focused on building upper-body strength or improving their physique. After all, a strong, well-developed chest ...

Sitting, standing, and moving between the two seem almost involuntary, but your body's muscles are working hard to make these motions happen. Your skeleton has over 600 muscles attached, and many of ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." DEPENDING ON YOUR training approach, you might think about your body as being comprised of two distinct ...

We live in a muscle-obsessed culture. If you train smart and hard, you don't need to spend every day in the gym, though. Build your upper body with chest presses, rows, lateral raises, bicep curls, ...

An upper-body dumbbell workout improves strength and muscle definition through fat loss, also known as 'toning'. It can also help improve mobility and flexibility in these muscles, boosting longevity.