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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. 10000 m Backwards Inline Skating, Female - Current world record 1. Christina Lutz skated backwards when they took part in the 10 km race at the ZDF Skater Day 2007 on 23 September 2007 in Mainz. She finished the race in 29:57.8 minutes.     The Book of Alternative records - World records, record breakers and more!