Haematocrit in a sentence as a noun

There are already cases in the late 80's, early 90's of cyclists dying in their sleep because their haematocrit levels were so high their blood because too viscous to pump when their heart rate dropped too low. That and your use of the word "roids" and "bikers" makes me think you're not well read up on the subject.

Haematocrit definitions

noun

the ratio of the volume occupied by packed red blood cells to the volume of the whole blood as measured by a hematocrit

See also: hematocrit

noun

a measuring instrument to determine (usually by centrifugation) the relative amounts of corpuscles and plasma in the blood

See also: hematocrit