An Indoor Leg Workout For the Next Rainy Day

If cold, wet weather threatens to dampen your outdoor running goals, don't sweat it. Do this 25-minute leg-strengthening circuit indoors instead. The lunge and plank variations help work leg, butt, and ab muscles that running overlooks — so you'll become a better runner the more you do this workout — and the short but sweet circuits ensure you'll be toning and burning calories as well.

To do a walking lunge, read our tips here. Find out how to do a basic reverse lunge here.