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Bike away, SoulCycle. The latest celebrity trend is Toddlerography, the ultimate cardio experience taught by toddlers. A test of flexibility, rhythm, and endurance, the children raise the bar on aerobics, putting Kate "Six Pack" Hudson and James "Jiggle all the way" Corden to the test.

If you've got toddlers at home, promote them to personal trainer so you could build the endurance to chase them around the house.