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This weekend, Chicago will be hosting the NASCAR Grant Park 220 – the first street race in a U.S. city in 60 years.

As someone who admittedly has never watched a NASCAR race, I always viewed driving as a sport of precision, strategy and hand-eye coordination – which it is. But I had no idea about the physical toll racing took on drivers.

Michael Reid, a physiologist at the University of Florida, has been studying how race car driving puts immense stress on the body’s muscles and heart. He and his team have discovered that the metabolic demands are the same as playing basketball – and that’s without taking into account the layers of protective equipment drivers must wear. He takes readers inside the steaming cockpit of a stock car, where drivers compete “in what’s essentially a moving oven.”

City races like the one in Chicago this weekend can be especially brutal on the body, especially when they’re held in the dog days of summer. “Compared to oval tracks, heart rates are higher on road courses and street races,” he writes, due to “the extra work required for hard braking and sharp turns.”

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Nick Lehr

Arts + Culture Editor

Race car drivers compete in full-body safety gear while sitting in a piping hot car, which puts tremendous strain on the heart. Grant Halverson/Getty Images for NASCAR

Think being a NASCAR driver isn’t as physically demanding as other sports? Think again

Michael Reid, University of Florida

Imagine an NBA game played outdoors in August, with no substitutions and players wearing snowsuits, gloves and ski masks. Race car drivers routinely compete under similar conditions.

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