Biceps tendonitis is generally a chronic injury, where the tendon sheath has become inflamed over a long period of use. As a result, the most important treatment for biceps tendonitis is rest to allow ...

While desperately manteling a highball 10 years back (I am now 46), I felt my shoulder shift and heard alarming noises. Although I recovered, my shoulder has recently become painful. I had an MRI and ...

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. Arm day can be one of ...

Biceps tendinitis occurs when there’s inflammation of the biceps tendon. This tendon stretches along your biceps muscle from your elbow up to your shoulder. Repetitive motions, particularly from ...

One of the most important arm muscles is the triceps brachii (the triceps, for short). You use your triceps to extend your arm. It opposes the biceps muscle, which is used to flex the arm. You also ...

Q. I was lifting in the gym last week and felt a pop on the outside of my left elbow. I had severe pain and noted a deformity in the muscle. My doctor sent me to an orthopedic surgeon who told me I ...

As the old adage goes, good things always come in threes, so it’s no surprise the most eye-popping muscle in your arms is, in fact, three parts that join together. 'There are three heads to the tricep ...