DonnaJean Wilde held an abdominal plank for five hours at the Huntsman World Senior Games, smashing her own Guinness world record by nearly 30 minutes.
https://www.foxnews.com/health/grandmother-12-holds-plank-5-hours-record-breaking-feat
https://www.foxnews.com/health/grandmother-12-holds-plank-5-hours-record-breaking-feat