I am also concerned that if I pass the 2nd test they might ask questions or take some action based on the fact that my creatine (creatinine?) level will be vastly different this time due to no abnormal dilution. Maybe that is silly paranoia, but my response might be something like "I work out and tend to drink water--in addition (or maybe just this --> ) I smoke cigarettes and drink water to combat dry mouth at work and in general."