Strain (1): A trauma, tear, or rupture to the muscle or musculotendinous unit from violent contraction or excessive forcible stretch. When a muscle is stretched beyond its normal capacity the tensile forces can cause one or more of it's fibers to tear. When a muscle produces more force than the muscle fibers can withstand it is termed dynamic overload and this usually occurs during eccentric action when there is an elongating force exerted distal to the muscle's attachment. Can also be caused by a sudden blow. See Musculoskeletal Injury First Aid.
Strain (2): A measure of deformation which describes the changes in the dimensions of a body as a result of load application. In mathematics strain is designated by the Greek letter Epsilon: ?. Although many laypeople think of stress and strain as the same thing they are not.
This page created 10 Sep 2011 19:43
Last updated 02 Mar 2016 20:25