Answer:
if you repeat the same exercise, the body works more efficiently and burns more calories to experience different types of exercise.
Explanation:
<em>o</em><em>p</em><em>t</em><em>i</em><em>o</em><em>n</em><em> </em><em>3</em>
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
#SPJ1
It would affect the respiratory system
