Abstract Knowledge is sparse about the extent of potential dehydration due to prolonged
strenuous cycling and its haematological acute effects on the haematocrit (Hct) in study
populations credibly not taking any kind of doping. With increasing training load levels of Hct
and haemoglobin (Hb) decrease in both amateurs and professionals as a long-term
consequence due to expanded plasma volume (PV). On a short-term basis, however,
counteracting dehydration potentially brought about by endurance exercise may cause a …