Table 1 Results from the non-parametric Wilcox tests on the pitch values at the second time point among the four groups

Groups compared	W	p-value
Men-women	1,123	<.05
Men-girls	123,090	<.05
Men-boys	174,830	<.05
Women-boys	69,047	<.05
Women-girls	96,412	<.05
Boys-girls	31,326	0.002