A plank may look like a simple exercise; but it takes a lot more strength and stamina than you'd think.Most people struggle to hold a plank for more than a minute, but 16-year-old Gabi Ury just broke a Guinness World Record by planking for 80 minutes!

Gaby's record-breaking feat earned tens of thousands of dollars for Children's Hospital.  Check out the video above for the full story!