Question-   Difference between isometric and isotonic contractions

Solution-

DIFFERENTIATE BETWEEN ISOMETRIC AND ISOTONIC MUSCLE CONTRACTION

 

 

Isometric Contraction:

 Define:                                    

            A muscular contraction in which the length of the muscle does not change.

Explanation:

                      In contrast to isotonic contraction, isometric contractions generated force without changing the length of the muscle, common in the muscles of the hand and forearm responsible for grip. The muscle contraction required to grip but not move a heavy object prior to lifting would be isometric. Isometric contraction are frequently used to maintain posture.

Example:

1: Deltoid muscle

2: Hamstring muscle

3: Rectus abdominis

4: Knee muscle

 

Isotonic Contraction:

 Define:                                      

            A muscular contraction in which the length of the muscle change.

Explanation:1

Isotonic contraction maintain constant tension in the muscle as the muscle changes length. Isotonic muscle contractions can be either concentric or eccentric.

Example

1: Biceps Muscle (long and short head)

2: Triceps Muscle (long, medial and lateral head)

3: Trapezius

4: Latissimus Dorsi

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