The idea of popping a few painkillers before an Ironman is becoming commonplace. One study showed that as many as 60% of triathletes were taking medication such as Ibuprofen before or during races, and Ironman recently announced Aleve – “the pain relief brand trusted by millions” – as a new sponsor for its 2019 world championship in Hawaii on 12 October.

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The partnership would imply there’s little risk to using artificial assistance to help see you through what is, after all, billed as the hardest one-day event on the planet. If it reduces discomfort and is promoted by the biggest brand in the sport, what could possibly be amiss?

Plenty, according to the backlash from both medical professionals, and professional and amateur athletes, who believe the drugs’ side effects – to fatal levels in extremis – are not being disclosed to an unwitting endurance sport community.