Cynthia Arnold must think just running a marathon is super boring. That's why she set out to set a Guiness Book of World Record by running the marathon while pushing her three kids in a triple stroller!
For those trying to do the math, that's pushing an extra 185 pounds. Her kids at 6, 4 and 1.
She already had the record for fastest half marathon and smashed the previous marathon record by 55 minutes!