Lace up your running shoes and prepare to sprint! With Summer's warm weather and plush outdoor surroundings, it's time to move Mama's exercise routine outdoors, and there's no better way to do it than with a jogging stroller. When Baby Jogger told us the company was preparing to introduce a new stroller that can convert from a jogger to a four-wheel stroller to a bike trailer, we couldn't wait to get our hands on it. The eye-catching Baby Jogger Pod chasis ($500) is equipped to handle three separate kits to make the transitions: a jogging kit ($60), a stroller kit ($80), and a trailer kit ($40). The company sent us all three kits to try on a beautiful Summer weekend, and while biking wasn't in the plans, the other two kits were put to the test. Here's how they fared.