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Stephen Simmons
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Cyclists measure power in watts. One horsepower equals 745.7 watts. Therefore the math is pretty straightforward. A recreational cyclist on a long ride might average between 150–200 watts, which is about 1/5–1/4 of a horsepower. A pro racer who specializes in sprints might hit 1500 watts…or about 2 hp for a VERY short burst. A Tour de France rider might put out 300 watts on average over the course of the day….or 0.4 hp.
Kind of amazing that a human can go out and cover great distances and/or hit such high speeds with a “motor” that’s significantly under the power level you’d find on a typical lawnmower.