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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. Running 100 yards with leg irons - Current world record 1. Cynthia Morrison, The Great Cindini (USA) ran 100 yards in 57.9 seconds, wearing leg irons with a 16 inch twist chain between each leg cuff on 22 Dec 2006 in West Palm Beach, Florida.     The Book of Alternative records - World records, record breakers and more!