Muscle stiffness is when the muscles feel tight and difficult to move, particularly after resting. This can cause them to feel sore. Possible causes include a sprain or strain, an infection, and ...

Personal trainer shares three hip flexor strengthening exercises runners can do to build strength and improve performance.

If a muscle or joint feels tight, stretching tends to be people’s first port of call. On the face of it, this approach makes sense, but a movement mechanics expert says it might not be the best ...

Chronic muscle tension could be more than stress. Discover how vitamin D deficiency might be the hidden culprit behind your tightness.

Muscle tightness might be your nervous system’s way of preventing you from accessing a position it perceives as dangerous. For example, ...

These four overlooked muscle groups are key to building strength, boosting mobility and unlocking true athletic performance – here’s how to train them right ...

A research group led by Dr. Keisuke Obara, Dr. Kento Yoshioka, and Professor Yoshio Tanaka from the Department of Chemical ...

When a muscle isn’t doing its job, your body starts recruiting other muscles to pick up the slack, which can cause stiffness, limited movement, or pain, according to Schwartz.

This was a randomized controlled study approved by the institutional review board of National Taiwan University Hospital (ClinicalTrials.gov ID: NCT01022827; Protocol ID: 200905041R). Patients ...

Background It has been reported that low back pain (LBP) is a major problem in figure skaters. However, the relationship between flexibility or muscle strength and LBP among figure skaters is unclear.