Bland and Altman plots of estimated and measured maximal oxygen uptake (VO
). Differences of VO2max in l/min (left) and ml · kg1 · min−1 (right) between Åstrand test and the measured VO2max test plotted against the mean of these two tests. The estimated VO2max with the Åstrand test is corrected for age predicted maximal heart rate with the Fox-Haskell (A-B), the Tanaka (C-D) and the Nes (E-F) formulas, respectively. The plotted lines in the figures show the 95% limits of agreement (n = 27).