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What needs to happen for muscles to grow and repair?

User Elect
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2 Answers

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The body repairs damaged fibers by fusing them, which increases the mass and size of the muscles. Certain hormones, including testosterone, human growth hormone, and insulin growth factor, also play a role in muscle growth and repair.
User Maxnk
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6 votes

Answer:

The three major ones are;

  1. Muscle tension
  2. metabolic stress
  3. muscle damage.

Step-by-step explanation:

User Jotaro
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