Concentric contraction
Concentric Contraction
Concentric contraction (/kənˈsɛntrɪk kənˈtrækʃən/) is a type of muscle contraction in which the muscles shorten while generating force. This is typical of muscles that contract due to the myosin cross bridges shortening the sarcomeres. It is contrasted with eccentric contraction, which involves the muscle elongating under tension.
Etymology
The term "concentric contraction" originates from the Latin words "concentricus" meaning "having a common center", and "contractio" meaning "a drawing together".
Mechanism
During a concentric contraction, the muscle develops enough force to overcome the resistance, and it shortens as it contracts. This type of contraction is used in most forms of physical activity, including lifting weights and performing body-weight exercises.
Related Terms
- Isotonic contraction: A type of muscle contraction in which the muscle changes length, either shortening (concentric contraction) or lengthening (eccentric contraction).
- Isometric contraction: A type of muscle contraction in which the muscle does not change length and the joint angle does not change.
- Eccentric contraction: A type of muscle contraction in which the muscle elongates under tension.
- Muscle fiber: The individual contractile units within a muscle.
- Sarcomere: The basic unit of a muscle's cross-striated myofibril.
See Also
This WikiMD.org article is a stub. You can help make it a full article.