Table 2 Non-parametric contrast test for independent samples (Mann-Whitney) between tracks for 2007 and 2008 seasons; and non-parametric test for related samples (Wilcoxon) between the two seasons and each track. Data are p < 0.05. NAT ABS MAN PULL ABS-C AT SJ TJ MT OM PC1 PC2 PC3 ET1 ET2 ET3 CP Independent samples Year E vs. W 2007 - - .002 - .017 - .027 .001 - - .001 - .027 .001 - .001 .000 2008 .007 .001 - - .002 - - .001 - - .000 - .05 .001 .001 .001 - E vs. O 2007 - .012 .002 .015 .012 - - .001 .027 - .002 - .004 .001 .001 .001 .000 2008 .000 .001 .001 .012 .000 - - .001 - - .002 .001 .001 .001 - .001 - W vs. O 2007 - - - - - - - - - - - - - .001 .001 .001 - 2008 .000 .001 .000 - - - - .001 - - .045 .001 .001 .001 .015 .002 - Related samples Race 2007 vs. 2008 E - .011 .018 .048 - - .017 - - - .011 .010 .012 - .012 .012 .005 W - .016 - - - - - .016 - - - .011 .012 - .012 .017 - O - - .011 - .024 - - - - - .017 .011 .011 - - - - E, W & O .043 .003 .003 .001* .003 - .000 .001 - .012 .000 .000 .000 .013 .000 .001 .005 ABS (Absorption), MAN (manual), PULL (pull), ABS-C (complete absorptions), SJ (simple jump), TJ (technical jump), MT (mixed techniques), OM (overtaking), PC1 (complete pedalling cycles in the race), PC2 (pedalling cycles to the first obstacle), PC3 (pedalling cycles on the first straight), ET1 (effort time from gate start to first obstacle), ET2 (time from gate start to first curve), ET3 (time from gate start to finishing line), CP (passes per curve).