Your deltoid muscles make up a main muscle group in your upper body. They’re connected with many other muscles and bones in your upper back, neck, and shoulder region and are extremely mobile. They ...

Bigger muscles have long been associated with strength, confidence and vitality. Visually, they create a powerful silhouette that signals athleticism and capability, which is one reason muscle ...

When your upper body workouts come around, your mind probably jumps to biceps, triceps, and back. But wait! You're missing a major muscle group that (unfortunately) often goes unnoticed: rear delts.

The shoulder muscles are responsible for maintaining the widest range of motion of any joint in your body. This flexibility is also what makes the shoulder prone to instability and injury. Muscles, ...

You may be able to improve mobility in your shoulders with stretches, such as the cross-arm stretch, and exercises with and without weights. These can include rows and arm swings. Whether you have ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. Your shoulders are an ...

Upper-body strength is essential in performing everyday tasks, whether it be carrying a heavy laundry basket, lifting a suitcase or picking up a child. A lot of my clients don’t focus on working their ...

Your rhomboid muscles connect your shoulder blade (scapula) to your spine. If your rhomboid muscles hurt, you’ll feel it in your back and shoulders. “The rhomboids can become painful because of ...