Muscle fatigue is a decreased ability to create force with your muscles. Electrolyte imbalance and overuse are some of the most common causes of muscle fatigue. Rest and massage are the best ways to ...

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 ...

Muscle cramps are a common issue that many people get from time to time. If one of your muscles feels like it’s contracting (getting tight) for no reason — and you can’t get it to relax — that’s a ...

Muscle knots are highly irritated muscle fibers that have tightened into a ball in one area of your muscle. These painful, tender spots can feel sore and often occur in your upper back, shoulders, or ...

Without realizing it, many of us start our day by stretching before we even get out of bed. Involuntary stretching of your muscles is called pandiculation. It’s a behavior seen in most types of ...

Muscle and joint pain may overlap, but they can have different causes and treatment approaches. Muscle and joint pain can accompany swelling, stiffness, reduced mobility, and other symptoms. This ...

Zachary Gillen does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...

Any physical activity that places too much or unusual strain on the muscles can lead to soreness. Everyone can experience muscle soreness, even people who exercise regularly and have good physical ...