Smoking causes breathing complications including problems with exercising. You're always two steps ahead of normal guy, so you have an advantage in everything you do, whether you're dealing with a bank manager, trying to buy something, or trying to fix something, whatever. Bicarbonate is an indicator of the acid-base Blood Balance. If there are subluxations (spinal misalignments) at these levels, you will have interference of these nerve pathways, resulting in suboptimal adrenal function.