Hi there wreck, very good advice has been posted so far. Mine is a tip on how to slow your heart rate down after you have done a ride, and it is simple. Stand up straight with hands on hips and breath through your nose in a controlled manner. Quite quickly your heart rate will start to slow. As you get fitter and your body gets used to exersize your heart and lung functions will be able to return to normal on there own in a short time.