Katie Ledecky is redefining the limits of athletic performance

It’s hard to describe just how good a swimmer 19-year-old Katie Ledecky is without it sounding hyperbolic.

Last summer, Outside magazine described her as “the best athlete in the world right now.” This spring, the Washington Post tried to explain “how Katie Ledecky became better at swimming than anyone is at anything.”

The thing is, it’s hard to dispute them.

“She is the real deal,” says Dr. Michael Joyner, a physician and Mayo Clinic researcher who is one of the world’s top experts on fitness and human performance.

“She’s among the greatest endurance athletes ever, full stop,” he tells Tech Insider.

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