This workout, designed by Urban Jungle, a bootcamp program based in New York City, can be done anywhere -- at home, at the park or in a hotel room. By using your own body weight as resistance and allowing only 30 seconds of rest between each exercise, you'll get your heart rate up and tone your body all in 30 minutes. You could even squeeze it in while the kids are taking a nap.
For best results, perform this no-equipment work out three times a week for three weeks, making sure to increase intensity (the number of reps in each one-minute timeframe) each week. Two days a week, you will need to put in 30 minutes of cardio or yoga. After a couple of weeks, you should start feeling stronger, have more energy and notice your clothes feeling looser.