Fig. 3.

Changes in performance ratios for swimming, cycling, running and total times across the years for top 10 finishers in each male age group. A performance ratio equal to 1 corresponded to the performance of the top 10 finishers of the 18–39-year age group. Solid lines represent conditions where the slopes of the linear regressions were significantly different (P < 0.01) from zero. Dashed lines indicate the slopes of the linear regressions were not significantly different from zero. Lines cross only the range of years for which data were considered