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Tuesday, 27 December 2011

Isotonic Contractions

Isotonic contractions are muscle contractions which cause the muscle to change its length as it contracts and causes movement of a body part. There are two types of Isotonic contraction:


Concentric
-The most common type of muscle contraction. Muscle length shortens under tension- from "long and thin" to "short and fat". Examples include:

  • Pull ups; 
  • Push Ups;
  • Sit Ups;
  • Bicep Curls;
  • Throwing a ball; 
  • Swinging a bat.
Eccentric- Eccentric contractions are when the muscle gets longer under tension. Examples include:
  • Football/Soccer
  • Walking
  • Squats

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