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As part of the inov 8 challenge series, tri-athlete Mark Bayliss attempts a new world record for the Arch to Arc Triathlon. Starting from Marble Arch in London, the event involves a gruelling 87 mile run to Dover, a Channel swim from Dover to Calais and a 181 mile bike ride from Calais to the Arc de Triomphe, Paris. This documentary follows his preparation and the completion of this extreme test of mind and body.
Top triathletes test their bodies and minds against triathlon's ultimate distance in the first major long course race of the year.