E ez80227 New member May 19, 2010 #2 exercising burns oxygen, among other things, and th eheart and the lungs need to increase function to keep up with the demand.
exercising burns oxygen, among other things, and th eheart and the lungs need to increase function to keep up with the demand.
E ez80227 New member May 19, 2010 #3 exercising burns oxygen, among other things, and th eheart and the lungs need to increase function to keep up with the demand.
exercising burns oxygen, among other things, and th eheart and the lungs need to increase function to keep up with the demand.
