The good thing about aerobic activity is that it includes many of the sports you probably already enjoy. Walking, biking, hiking, dancing, swimming even basketball are all examples of aerobic exercise.
Another good thing is that you can easily accomplish those two 10 minute sessions with things like taking the stairs instead of the elevator, walking around the neighborhood after work or parking your car farther away. You could even turn shopping into an aerobic activity. Shopping is walking, so don't stop for 10 minutes straight and you've workind in one of our daily sessions! Check with your local mall for mall walker programs. Make it a great day!