Paula Radcliffe has expressed concerns over athletes releasing their blood data to the public. The 42-year-old, who has won London Marathon three times, told the BBC that the data could easily be misinterpreted and even used to inform athletes looking to manipulate the system. Her position is in line with the World Anti-Doping Agency's advice to athletes not to release their data.
Radcliffe said "The key point is you can't prove you are clean. We don't have a full proof, 100% testing programme in place right now so we can't prove that. In some sense, what Wada are trying to say is we don't want this data out there in the public domain because people don't understand it, it is very complicated.
"Something like the blood passport has taken a long, long time to get to a position where it can be properly interpreted by proper experts and used. It is not a test you can fail, that is important to stress. It is a tool that is used to guide more targeted testing and then can be built up to a point where the experts agree, it can be an accurate pointer to blood testing.
"I think if you put too much of that information in the public domain you risk doing a lot of things, you risk it being misunderstood and misinterpreted, you also risk putting information into the hands of people who are trying to cheat that system and who then are going to learn the information of how to manipulate and how to make sure they stay within this perfect zone and that is not what we want or what it was ever designed to do."