The arm extends from the shoulder to the wrist, including the upper arm and forearm. Different muscles may work together in intricate ways to help the arm, wrists, fingers, and hands function. Knowing ...

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. Curls are the classic ...

I consider myself well-versed in fitness lingo and have tried more workout classes than I can count — everything from standard bootcamp cardio classes and traditional Pilates to acrobatic aerial yoga ...

Bicep tendonitis is usually caused by overloading and overusing the biceps tendon. The primary function of your biceps is elbow flexion and turning your palm up. Biceps tendonitis symptoms can include ...

The biceps and triceps are two major muscle groups of your arm that play a significant role in the movement of the upper extremities. Well-developed biceps and triceps are highly sought after by ...

The majority of us know what bicep curls are and have done them at some point in our fitness journey. If you’ve ever grabbed a pair of dumbbells and been told to “just do curls,” you might’ve never ...