Muscle contraction is the tightening, shortening, or lengthening of muscles when you do some activity. It can happen when you hold or pick up something, or when you stretch or exercise with weights.

Kirstyn Hill has worked as a clinical pediatric and women’s health pharmacist since 2020. She was driven to work with a patient population that is not often able to easily speak up for themselves and ...

Myopathy is a general term for diseases that affect your muscles. The muscle fibers don’t work properly, which leads to muscle weakness and other symptoms. Some myopathy is inherited and present at ...

Jay N. Yepuri, MD, MS, FACG, is a board-certified gastroenterologist and member of the Digestive Health Associates of Texas Board of Directors and Executive Committee. A liver function test checks how ...

Objective To determine how distinct combinations of resistance training prescription (RTx) variables (load, sets and frequency) affect muscle strength and hypertrophy. Data sources MEDLINE, Embase, ...

Neuromuscular disorders affect nerves that control voluntary muscles, including those in your arms, legs, and face. Nerve damage can lead to muscle weakness and loss of control. Examples of ...

Studies on the neurons of mice suggest our own human endurance may have more to do with the brain than our physique. Regular exercise strengthens muscles and improves endurance—but new research ...