Question

what changes are observed in muscles while working​

Answer 1

Answer:

You build up muscles

When you work out, you make tiny tears in your muscle fibers. These tears are then repaired and built upon, resulting in stronger connective tissue and stronger muscles. The diameter of your muscle fibers increases.

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Answer 2

Explanation:

The changes include large increases in heart rate and cardiac contractility to increase cardiac output, increased rate and depth of respiration which requires enhanced blood flow to respiratory muscles, vasodilation and increased blood flow in the contracting skeletal muscles, and vasoconstriction in the renal,...