The Murph consists of a 1-mile run, 300 squats, 200 pushups, 100 pullups, and another 1-mile run. On Memorial Day, a number of participants opted for the Hero Murph WOD, where the entire thing is done while wearing a 20-pound weighted vest.

Among them was Lee Davis from Charleston, South Carolina, who set out to break records by performing as many Murphs as possible in a 24-hour period.

"I wanted to try my hand at setting a world record," Davis told ABC News . "I wondered 'what is the most Murphs done in 24 hours?' Memorial Day coming up and I've had a fast Murph time before. I saw there was 15 done in 24 hours, if you get 16, that's one every hour and a half, I figured I could do that. My fastest time is 36 minutes so I could definitely keep up for every hour and a half."

View this post on Instagram Unofficial world record for Murphs (1 mile run, 100 pull-ups, 200 pushups, 300 squats, 1 mile run with 20lb weight vest) in 24 hours is now 16. Thank you to everyone who showed up, worked out and supported me. Im so honored to be surround by you guys. And dont forget... Soft living makes soft men. 16 Murphs to beat record means 1 murph every hr and 30 mins. Started at 6 pm Sunday. Farthest right column was my actual time compared to what time I finished the murph compared to what I needed to break the record. Wanted to make sure I had a buffer. #murph24challenge #murph24hourchallenge #murph24 #murph #murphchallenge A post shared by Lee Davis (@ldavis3b8) on May 26, 2020 at 7:50am PDT

Davis began the workouts at 6 p.m. on Sunday. He hit his target of 16 Murphs (totaling 32 miles, 4,800 squats, 3,200 pushups and 1,600 pullups, all in a weighted vest) in approximately 22 hours, setting a new world Murph record albeit an unofficial one, as his challenge was completed outside of a competition setting.