Sprinting 400 meters doesn't seem so bad. Sprinting uphill the entire time? Holy cramping calves! This video shows what it's like to race the steepest 400-meter race in the world – the Red Bull 400. Races are set up on ramps usually used for ski jumps, and this one took place in Park City, UT, where competitors climbed up a 36-degree incline at an altitude of 7,000 feet. A race isn't a race unless you need an oxygen mask at the end.
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