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, ...

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 ...

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 ...

A strong set of shoulders is important for an active daily life. Not only does the shoulder joint have the largest range of motion in the body, but the muscles of the shoulder girdle are also ...

Jenessa Connor is a writer with experience writing health, fitness, and nutrition topics for publications, websites, companies, and experts in wellness spaces. It's important to spend time ...

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 ...