Answer: X is the quantity value.
Explanation:
Atrophy - the decrease in the size and strength of a skeletal muscle when it’s not used.
hypertrophy - the increase in the size of a muscle fiber in response to resistance training.
muscle endurance - the ability of a muscle to move a weight repeatedly, or for an extended period of time.
muscle strength - the greatest amount of weight a muscle can move at a single time.
progressive resistance exercise PRE - exercise that strengthens the skeletal muscles through adding more physical strain on them over time and letting them develop and adapt to this stress.
resistance - force or weight that is used to make the muscle work harder to contract.
skeletal muscles - body tissue that is connected to and moves the bones in the body.
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