Sprinter. Anatomical artwork of a human sprinter, with the heart and leg muscles highlighted. The maximum heart rate can vary between 160 and 220 beat

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Sprinter. Anatomical artwork of a human sprinter, with the heart and leg muscles highlighted. The maximum heart rate can vary between 160 and 220 beats per minute, but decreases with age. The leg muscles used by sprinters are mainly fast-twitch muscle fibres, which contract quickly and consume lots of energy during short bursts of running.

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Size: 5069px × 3499px
Photo credit: © SMETEK/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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