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  • Title: Measurement of maximal oxygen consumption of thoroughbred horses at an altitude of 1250m using open-circuit flow-through calorimetry.
    Author: Lund RJ, Guthrie AJ.
    Journal: J S Afr Vet Assoc; 1995 Dec; 66(4):239-43. PubMed ID: 8691414.
    Abstract:
    This study determined the maximal O2 uptake (VO2max) of Thoroughbred horses acclimatised to mild hypobaric conditions using a standard exercise test on a treadmill inclined at a 7% slope. The O2 uptake (VO2) versus speed relationship was linear below the exercise intensity required to attain VO2max. The VO2max of individual horses ranged from 143.5 to 172.6 ml/kg/min. The proportion of total variance for the VO2 versus speed relationship was greater than 0.992, and the coefficients of variation in repeated tests in individual horses ranged between 0.07 and 1.54%. The VO2 versus speed relationship attained a plateau at speeds above the VO2max, which ranged from 9.3 to 12.0 m/s. When work intensity was increased above that of the VO2max, there was no further increase in VO2, thus showing that a maximum had been attained.
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