Figure 1.

Individual changes in six-minute-walking distance (6MWD) after 3 and 15 weeks exercise training. Using the Wilcoxon rank test, P < 0.001 was obtained for the comparisons with baseline at week 3 (n = 21) and P = 0.003 for comparison to week 15 (n = 11). The dashed line indicates the mean change from baseline in 6MWD (67 ± 52 meters and 72 ± 35 meters).