Normative data on regional sweat-sodium concentrations of professional male team-sport athletes

Table 3 Correlation coefficients for sweat-sodium concentrations and self-reported measures

	[Na⁺]- self-reported sodium loss			[Na⁺]- self-reported cramping			Self-reported cramping- self-reported sweat- rate
	r _s	p		r _s	p		r _s	p
Soccer (n = 270)	0.748	<0.001	**	0.055	0.371		0.049	0.421
Rugby (n = 181)	0.813	<0.001	**	0.184	0.015	*	−0.030	0.689
A. Football (n = 60)	0.962	<0.001	**	0.114	0.387		0.189	0.147
Basketball (n = 52)	0.953	<0.001	**	0.095	0.577		0.308	0.064

[Na+], sweat-sodium concentration. Data are means ± SD. Significantly correlated * p < 0.05; ** p < 0.01. mxf: Self-reported data were not collected for the baseball cohort

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