Athlete Biological Passport and Whereabouts

The Athlete Biological Passport (ABP) tracks an athlete's own biological markers over time for the effects of doping, and whereabouts lets athletes be found for no-notice testing out of competition.

Some doping, such as blood transfusion or carefully timed drugs, may have cleared by the time of a test yet still leaves its mark on the body. Together the 2 systems turn anti-doping from a single snapshot into long-term monitoring.

For the sport and exercise medicine (SEM) clinician they sit in the background of care. Anyone who orders blood tests, advises on iron or altitude, or treats a tested athlete needs to understand how the passport reads biology and what the athlete must do, and must never help an athlete avoid testing.