The human desire to go fast is old, dating back at least as far as the first time some adventurous Yamnaya saw a horse on the Pontic-Caspian steppe and thought, “I bet if I jumped on that thing’s back, it would be faster than walking.”

A thousand years later, someone else invented the wheel—and the chariot—and humanity was ready to roll. Now, about five millennia since that first horseback ride, equestrianism is mostly a leisure activity, and we drive cars, propelled by motors with more power than an entire herd of beasts could muster.

Acceleration, top speed, and lap times are the usual ways we quantify that performance, and performance electric vehicles are currently in an arms race to see which one can hit 60 mph in the least amount of time. But measuring a car’s performance is easy—all you need is a stopwatch and a track. How about measuring the effect of car performance on the driver? That’s a question Polestar is trying to answer with researchers at the University of Oxford.

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