104,538 jumping jacks in 24 hours. 41,788 leg raises in 12 hours. 110,015 crunches in 17 hours. 133,581 crunches in 30 hours. 160,974 sit-ups in 82 hours. 70,715 sit-ups in 24 hours or less. If these sound like ridiculous, “there’s no way a person can do that” numbers, think again.

They’re all fitness endurance feats accomplished by Air Force veteran Louis “Lou” Scripa Jr. between 1986 and 1992, and acknowledged by the Guinness World Records. Severely wounded by shrapnel during the Vietnam War, Louis Scripa Jr. battled his way back, establishing half a dozen fitness endurance records in as many years.