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