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Olympians turn to performance technology to gain an edge in Tokyo

Thermo pills, hot boxes, liquid chalk mitigate effects of heat and humidity, but it’s still up to the athletes to race

(Tommy Zaferes/contributed photo) Two-time U.S. Olympian Katie Zaferes trains on her bike in a tent equipped with a heater and humidifier that takes temperatures above 90 degrees and humidity around 80% — similar conditions to those she'll face in Tokyo for the Olympics in the coming weeks.