I think the answer is B. Overload principle.
The overload principle puts load on the body. Usually more than the body is used to.
Hope this helps!:)
The part of muscle that he needs to train is the Slow-twitch muscle fibers.
<h3>What are Slow-twitch muscle fibres?</h3>
The Slow-twitch muscle fibers are the muscle fibres that are used to support long distance endurance journey such as the marathon race.
Therefore, the part of muscle that he needs to train is the Slow-twitch muscle fibers.
Learn more about muscle here:
brainly.com/question/13920046
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Which key nutrient has been known to reduce the risk for heart disease for all adults over the age of 51?
d. vitamin b12
Teacher, coach, childcare worker, and physical trainer
Try to think about what you think your doing and try stopping it
