If the thought of squeezing in long workouts at the gym while balancing family life and work stresses you out, take a breather -- with some creative approaches, you can squeeze in 20 minutes a day while running a household. "Fitness isn't limited to just the four walls of a gym," says Jessica Matthews, exercise physiologist for the American Council on Exercise. "For busy parents, there are many creative ways to add more physical activity to your day."