Put a person on a bicycle and they become the most efficient - TopicsExpress

Put a person on a bicycle and they become the most efficient creature on Earth. No other living thing can expend so little energy for so much self-powered travel. And thats just when riding along level ground. When a person rides downhill, the free energy from gravity reduces the demand on the human body even more. popularmechanics/outdoors/sports/physics/cycling-science-7-fascinating-facts-about-bikes#slide-1

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