Define the progressive overload principle as it applies to physical fitness
What will be an ideal response?
A person who practices a physical activity adapts by becoming better able to perform that activity after each session. People shape their bodies by what they choose to do (and not do). Muscles cells and tissues respond to a physical activity overload by building, within genetic limits, the structures needed to perform it.
The muscles adapt and build only the proteins they need to cope with the work performed. Muscles engaged in activities that require strength develop more of the proteins needed for greater muscle mass; body builders have large, well-developed muscles. By comparison, those engaged in endurance activities develop more of the proteins needed to combat muscle fatigue; distance cyclists can pedal for many hours before fatigue sets in.
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