Figure 1From: Anaerobic threshold, is it a magic number to determine fitness for surgery?Plot of base excess, lactate, V ˙ CO 2 and V ˙ CO 2 . Simultaneous plot of lactate, base excess and gas exchange. This was obtained from a man exercising on a cycle ergometer. Samples at one minute intervals. Note that the base excess falls very much as the reciprocal of the lactate rise. Data from author’s laboratory.Back to article page