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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. Ab Crunches With 100 lb, 30 Min - Current world record 1. James Clark (Ecuador) did 651 ab crunches with 100 lb weight in 30 minutes in the TV show "Twin Cities Live" on 1 May 2008.     The Book of Alternative records - World records, record breakers and more!