You will be able to work out longer and better
Jump rope, run sprints, cycling, distance running and more. Cross train for the best results.
Some fitness activities include: weight-lifting, running, swimming, biking, cross-country skiing, spinning, Pilates, Yoga, walking, hiking, dancing, kickboxing... and the list goes on and on....
look up "sprint training" it has done wonders for me
it impoves it because you are getting your taret heart rate up and making your heart getting use to beating
EA Sports Active: Workouts GDC 2010 Trailer
The Truth About Abs - Episode 21 - Brides Made Fit
Quick
Fitness for Kids - Basic Cardiovascular Exercise