I assume that you mean carbohydrate drink, but as someone whos work for the last 8 years has revolved around CHO cells, all I can imagine is you must have a strong gag reflex to be necking cell culture fluid mid-run.
And yes CHO cells can be used to synthesise EPO.
Yeah, I've seen CHO as shorthand for carbohydrate in a lot of places but it's not a huge saving over 'carbs'..