Oxygen consumption in treadmill-exercised Yucatan miniature swine

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Abstract
O2 consumption was measured in Yucatan miniature swine during various intensities of treadmill exercise. Nine animals were evaluated at rest and at various treadmill velocities ranging from 2.5-4.5 mph. O2 consumption was linearly related to treadmill speed during submaximal exercise work loads (r = 0.92, P < 0.01). Maximal O2 consumption was also determined in 2 groups of animals. In 1 group (N = 6) the highest attainable O2 consumption was 24.0 .+-. 1.31 ml .cntdot. min-1 .cntdot. kg-1. In the 2nd group (N = 9) an electric prod was utilized to encourage the animals to run. Their maximal O2 consumptions ranged from 33.9-51.1 ml .cntdot. min-1 .cntdot. kg-1 with a mean of 41.7 .+-. 1.8 ml .cntdot. min-1 .cntdot. kg-1. Yucatan swine have a relatively low aerobic capacity compared to the rat or dog but their O2 consumptions are similar to those observed in untrained man.