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During the sixth round, when spellers were asked to choose a definition or example of words given without a definition, Deetya Vuppala was asked to choose an activity that is ergogenic — intended to enhance physical performance, stamina, or recovery.

Deetya was given “ergogenic,” and Roy’s bid to become the first champion from The Bahamas ended when he was asked to define “rumbustical.”

Mr. Fitzgerald, from WADA, countered that Dr. Wagner’s anecdotal evidence fit the meaning of “ergogenic.”

Music can also have an "ergogenic" or work-enhancing effect.

The International Olympic Committee’s acknowledgment last year that beet juice is a sports food with good scientific evidence to back it — along with other ergogenic aids, or endurance enhancing supplements, such as caffeine, creatine, beta-alanine and sodium bicarbonate — have only fueled beet juice enthusiasm.