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25.05.2026 New claim submitted for Backwards Stair Climbing, 1 Hour 09.05.2026 New claim submitted for Mental Calculation, Division 09.05.2026 New claim submitted for Mental Calculation, Square Roots Keywords: (e.g football beer mat)	Listed below are the verified claims for the record listed. Backwards-Running, 4x200 m Relay - Current world record 1. A relay from SV Werder Bremen (Olaf Kelterborn, Philipp Arlt, Hauke John, Bela Renk, all Germany) ran a 4x200 m backwards relay in 2:29.63 minutes on 29 May 2010, Bremen, Germany.     The Book of Alternative records - World records, record breakers and more!