Triceps tendonitis can be caused by overuse, often due to work-related activities or sports, such as throwing a baseball. It can also occur due to a sudden injury to the tendon. There are several ...

Your triceps are an important muscle in the back of your arms. They help you extend your arms, provide strength for pushing, and help keep an overall balance in your upper body. ‌ Tendons connect your ...

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 ...