How to do cardio with an infant?

Runner-stroller: Manny big stores carry the so-called runner-stroller (big wheels) designed for faster speed, thus you can use to push your infant along while running/exercising. Just make sure you find a path that is relatively smooth. You can also do treadmill, stationary bike, infront-of-tv activities at home while baby is asleep. If there is a will, there is a way--and u have the will. Consult doc. Good luck.