Life: The Science of Biology 11th Edition

Published by W. H. Freeman
ISBN 10: 1-31901-016-4
ISBN 13: 978-1-31901-016-4

Chapter 47 - Musculoskeletal Systems - 47.2 - Many Factors Affect Muscle Performance - 47.2 Recap - Learning Outcomes - Page 1014: 3

Answer

Strength training causes microfractures in existing muscle fibers, causing the fatigued muscles to develop more actin and myosin within the damaged fibers. As a result, the muscle fibers get bigger and stronger. Aerobic training leads to higher endurance as a result of more mitochondria and myoglobin within skeletal muscle cells. Aerobic training boosts the capacity of muscle to produce ATP using oxygen.

Work Step by Step

Strength training causes microfractures in existing muscle fibers, causing the fatigued muscles to develop more actin and myosin within the damaged fibers. As a result, the muscle fibers get bigger and stronger. Aerobic training leads to higher endurance as a result of more mitochondria and myoglobin within skeletal muscle cells. Aerobic training boosts the capacity of muscle to produce ATP using oxygen.
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