The origin is the end of a muscle which is attached to a fixed bone. The insertion is the other end of the muscle that is attached to the bone which moves. Muscular contractions are defined as the ...

Isotonic contractions – these occur when a muscle contracts and changes length and there are two types: Isotonic concentric contraction – this involves the muscle shortening. The origin and ...

The purpose of this study was to compare an acute bout of either isometric or isotonic muscle contractions on patellar tendon pain and function and maximal voluntary isometric leg extension torque.