PHYSIOLOGY
MUSCLE CONTRACTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Planking, doing a wall sit, carrying a load of firewood, playing in a tug-of-war where NO ONE is moving are examples of what kind of muscle contraction?
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Tetanic
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Isometric
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Isotonic
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Isokinetic
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Eccentric
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Explanation:
Detailed explanation-1: -In a tug of war, all the forces applied by the people pulling towards them are along a line i.e. along the length of the rope. Therefore it is the example of collinear force.
Detailed explanation-2: -Stationary exercises such as wall sits, planks, bridges, hollow-body holds, are isometric.
Detailed explanation-3: -Isometric contraction occurs when muscle length remains relatively constant as tension is produced. For example, during a biceps curl, holding the dumbbell in a constant/static position rather than actively raising or lowering it is an example of isometric contraction.
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