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__________ is the ability of the heart, blood vessels, blood, and respiratory system to supply oxygen to the muscles during sustained exercise.

2 Answers

4 votes
Cardiorespiratory fitness is the ability of the heart, lungs, and blood vessels to supply oxygen to muscles during sustained physical activity.
User Martin Meeser
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1 vote
Probably cardiovascular fitness. Hope this helps ;)
User Eric Hodonsky
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