Tested athletes aren't using CERA. They don't need to use any drugs at all. Nothing beats blood doping. Especially if you are only racing seriously twice a year. That makes it very easy to take bags out to store and recover in time for hard training blocks and then it goes back in when it's time to pop off a big race.
To simplify the process slightly:
- You take the initial bag out in the offseason when you can be low on RBCs. It's easy to say your blood passport is messed up because you had a long season and now aren't training so your body does weird things.
- Then because you can only store your blood so long, you essentially take one unit out and put the last one back in however often needed; say once every 4-6 weeks to make sure the blood doesn't go bad. You don't lose any training quality doing this because your blood volume stays the same.
- When your A race comes around you put the bag in that you last took out, but of course this time you don't take another unit out. Now you are supercharged! You can run like the devil and conduct interviews within 20 seconds of running sub 2:05.
It's not the drugs guys, it's their own blood.