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09.05.2026 New claim submitted for Mental Calculation, Division 09.05.2026 New claim submitted for Mental Calculation, Square Roots 23.01.2026 New claim submitted for Pull-ups, 3 Minutes, Male Keywords: (e.g football beer mat)	Listed below are the verified claims for the record listed. Fastest Backwards Marathon (Men) - Current world record 1. Markus Jürgens (Germany) ran a marathon backwards in 3:38:27 hours on 9 April 2017 in Hannover.   Previous verified claims 1. Achim Aretz (Germany) ran a marathon backwards in 3:42:41 hours on 31 October 2010 in Frankfurt/Main, Germany.     The Book of Alternative records - World records, record breakers and more!