Increasing Oxygen Concentration in the Blood of the Racehorse

Oxygen is the fuel of life and its efficient use is the key to athletic fitness. The respiratory system of the racehorse must work hard to harvest the 20 percent of oxygen present in the air we all breathe. Observing a horse after his work on a cold morning provides a visual reminder of this, as the breath surges from his nostrils.
Barry Sangster (14 February 2008 - Issue 7)