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. 2008 Feb 6;3(2):e1552. doi: 10.1371/journal.pone.0001552

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Berthelot et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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A. Women 400 m freestyle (swimming) with biexponential decaying curve, adjusted r_i² = 0.976 and r_ii² = 0.966; B. Men 4×100 m freestyle relay (swimming), r_i² = 0.985, r_ii² = 0.988; C. Men 50 km walk (track), r_i² = 0.972, r_ii² = 0.977; D. Clean & Jerk Super Heavyweight (weight lifting), r_i² = 0.939, r_ii² = 0.937, r_iii² = 0.975 and r_iv² = 0.946. Weight categories were altered in 1948, 1968 and 1992 and control reinforced in 1988–1992 in weight lifting.