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Elite Young Runners Are Becoming Freakishly Fast. Welcome to 'Trackflation'

wired.com

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Re: Elite Young Runners Are Becoming Freakishly Fast. Welcome to 'Trackflation'

#4
post #3

As in swimming records being beat regularly, esoteric knowledge of 內功 techniques applied in training to fine young athletes plus latest scitech may be smashing speed and endurance records elsewhere.

What's 內功?

https://en.wiktionary.org/wiki/%E5%85%A7%E5%8A%9F