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.

6 Department of Rehabilitation Science, Osaka Health Science University, Osaka, Japan Background We have reported that a resistive single-leg squat (RSLS) exercise using exercise equipment that ...

Department of Sports Studies, University of Stirling, Stirling, Scotland, UK Correspondence to: A M Hunter Department of Sports Studies, University of Stirling, Stirling, Scotland, UK; ...