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.

Objective: To determine if the combined isometric contractions of knee extension/hip adduction and knee extension/hip abduction will elicit a different quadriceps and gluteus medius electromyographic ...

Researchers and clinicians use surface EMG to track contractions of the masticatory muscle, helping them to diagnosis and monitor a variety of jaw disorders. However, current data collection is ...