According to Guinness World Records, the “longest time in an abdominal plank position” is eight hours, 15 minutes and 15 seconds and was completed by former Marine George Hood in Naperville, Illinois ...

From high planks and low planks to side planks and plank jacks — plank variations aren’t hard to come by. We guess you could say that's what makes these OG bodyweight exercises (which can take true ...