Which of the following in not associated with a resistance training-induced change in the muscle cell? increase in the percentage of Type I muscle fibers. hypertrophy of Type II muscle fibers. increased number of myonuclei. increased activity of antioxidant enzymes.
Question
Which of the following in not associated with a resistance training-induced change in the muscle cell? increase in the percentage of Type I muscle fibers. hypertrophy of Type II muscle fibers. increased number of myonuclei. increased activity of antioxidant enzymes.
Solution
The option that is not associated with a resistance training-induced change in the muscle cell is "increase in the percentage of Type I muscle fibers."
Here's why:
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Resistance training is primarily associated with changes in Type II muscle fibers, not Type I. Type II muscle fibers are the ones that grow (hypertrophy) in response to resistance training. They are the "fast-twitch" fibers used in powerful, explosive movements, while Type I fibers are "slow-twitch," used for endurance activities.
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Hypertrophy of Type II muscle fibers is a well-documented effect of resistance training. This means the muscle fibers increase in size.
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An increased number of myonuclei is also associated with resistance training. Myonuclei are the "control centers" of muscle fibers, and having more of them can help the muscle respond better to training.
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Increased activity of antioxidant enzymes is another change that can occur with resistance training. These enzymes help protect the muscle cells from damage, which can be caused by the increased oxidative stress that comes with intense exercise.
So, the only option that doesn't fit is the increase in the percentage of Type I muscle fibers.
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