The deltoids are the muscles that cover the front, back and side of the shoulder joint — and they are essential for everyday movements like raising your arms, lifting a child or carrying groceries.

If you’re gunning for grapefruit-shaped shoulders, there's a good chance you're crushing overhead presses and gritting your teeth through sets of lateral raises. While these moves undoubtedly build ...

Regular resistance training that engages your shoulder muscles—primarily your deltoids, the rounded muscles that cover your shoulder joint—can help you remain functionally fit and avoid painful ...

Well-defined shoulders not only enhance your silhouette but also create a balanced frame that makes your waist appear smaller and improves overall posture. The good news? You don’t need complicated ...

Beth Skwarecki is Lifehacker’s Senior Health Editor and has been writing about health, fitness, and science here since 2015. Beth was the recipient of the 2017 Carnegie Science Award in science ...

Working through controlled positions encourages a smoother motion of your shoulder joint, which can help you lift your arms ...

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 ...