ACSM Personal Trainer

Answer: D - The muscle action used to dynamically stabilize the body through its noticeable lack of change in muscle length is isometric. In isometric action there is no change in muscle length because the muscle is exerting the same amount of force as is being placed upon it. An example of this action is when the weight stops for a pause at the midpoint of an exercise where the weight is being maintained in position and motionless by the muscle.