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.

For the past couple of years, we’ve all spent a lot of time at home hunched over a computer or a mobile phone as we work from the comfort of our homes. Sometimes, your posture can suffer from that ...

Your shoulders may look impressive from the front, but what about those rear delts? The rear delts are often overlooked, but they're important for building a balanced ...

But, let's be honest, how much attention do you give to the back part? That small yet mighty section known as the posterior deltoid. If your answer is "not much" or "almost none," don't worry, it's a ...

Ever notice the guys whose shirts seem to hang off their shoulders like a human coat rack? Those perfectly rounded, grapefruit-sized delts don’t just happen by chance or good genetics. Sure, DNA plays ...

The landscape of fitness has dramatically shifted toward home-based workouts, with back strength training emerging as a crucial focus for health-conscious individuals. The transformation of living ...

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 ...

Understanding the functions of all the muscles in the back is complex, but training them does not have to be. The muscles of the back help us do everything from standing up straight and opening doors ...

Compound exercises are the most comprehensive set of training to stimulate muscle mass. These exercises engage your whole body, including your glutes, forearms, back, and core. They may include heavy ...

Dr Mike Israetel explains why more variety doesn’t mean more muscle. Here’s what actually drives growth in the gym ...