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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. Stair Climbing, 12 Hours - Current world record 1. Marek Schuster (Germany) climbed up and down 93,932 stairs within 12 hours at the Augsburg town hall on 26 May 2005. This equals a vertical distance of 15 km - almost twice the height of Mt. Everest.     The Book of Alternative records - World records, record breakers and more!