A weight-lifter strains to lift a heavy weight and there is no movement of the person's arms holding ontothe weight. This type of contraction is called a(n) ________ contraction.

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An isometric contraction occurs when there is tension in the muscle but no change in its length or movement of the attached joint. In this scenario, the weight-lifter is straining to lift the weight but it is not moving, indicating that the muscles are contracting isometrically to maintain the tension needed to lift the weight.

A Weight-Lifter Strains to Lift a Heavy Weight and There