Biceps tendonitis is an inflammation or irritation of the upper biceps tendon. The upper biceps tendon is also called the long head of the biceps tendon. This strong, cord-like structure connects the ...

Pain in the triceps most often occurs due to triceps tendonitis. Other possible causes include triceps tears and snapping triceps syndrome. Treatments can depend on the cause. The triceps muscle is ...

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 ...

At one point or another, we’ve all experienced the unexpected, intense pain of a muscle cramp. Muscle cramps, also known as muscle spasms or charley horses, are the involuntary contraction of muscle ...

Unexplained muscle pain in the arms and legs may be the result of benign issues. Or it may point to a more serious underlying condition, such as fibromyalgia, infection, or thyroid issues. Muscle pain ...

Everyone knows that the road to toned arms is paved with bicep curls. But since the exercise is so familiar, many people don't think about their form while performing the move, and they end up doing ...

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 ...