Mother Nature might have put walking outdoors on hold for a bit, but that doesn’t mean you have to give up your walking routine until the weather warms. Instead, jump on that treadmill and follow this 30-day walking plan designed by Lisa Kinder, fitness trainer in Los Angeles and creator of the 10 Minute Solution: High Intensity Interval Training DVD. Worried about getting bored? Not with this program. You’ll mix it up with a different walk every day—burning calories, building muscle and getting fitter in just one month. So lace up those shoes and get your walk on!