Pee Like a Race Horse.
Where does the saying “pee like a race horse” come from?
Exercise-induced pulmonary hemorrhage (EIPH) is a possible sequelae of very intense aerobic exercise. It is associated with the very extreme and dynamic changes in cardiac function, oxygen intake and vascular transit in the lungs that can cause stresses on the blood vessels leading to loss of integrity.
EIPH can be seen in human athletes but also in racing greyhounds, camels, and most commonly horses.
The results of EIPH are microscopic lung damage, coughing, swallowing of blood, and epistaxis - the bleeding from the nostrils - when it involves the upper respiratory tract. Together, they have a marked negative impact on performance.
Historically, one of the therapies that race horse jockeys used was furosemide, a diuretic. It would be given to horses before a race, increasing voids and reducing fluid volume and thus the vascular strain of EIPH and improving performances.
Because of the dramatic effects of furosemide and its visibility in popular cultural, the phrase “pee like a race horse” was born.