A full day on the slopes requires endurance and good heart health, which means that cardio is key. From running to hiking, the choices are almost endless. In addition to hiking and surfing, both Kelly and Gretchen are big fans of biking. Gretchen even hops on the stationary bike when she can't make it outside.
Don't have a bike? Here are some cardio workout ideas to get your heart rate up sans pedaling. No huffing and puffing on the mountain for you!