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 ...

Rhomboid muscle pain occurs between the shoulder blades and spine. It may feel like tenderness around the shoulder blade. Risk factors for rhomboid muscle pain include injury and general overuse. The ...