Does body position before and during blood sampling influence the athlete biological passport variables?

Abstract

19The Athlete's Biological Passport (ABP) is a tool for the indirect detection of blood doping. Current 20 guidelines from the World Anti-Doping Agency (WADA) require a delay of 2 hours after any physical 21 exercise and to be seated for 10 minutes prior to any blood sampling to obtain a valid measurement. 22 30 30 min. The results support the current guidelines and additionally provide evidence to adjust the 31 waiting time for blood sampling after short changes in posture. 32