Table 3.

Correlation between changes in creatine kinase (CK) and movement and performance markers derived from global positioning system (GPS) data

	Forwards (n = 23)				Backs (n = 22)
	ΔCK		Δ% CK		ΔCK		Δ% CK
	+16 hrs	+40 hrs	+16 hrs	+40 hrs	+16 hrs	+40 hrs	+16 hrs	+40 hrs
Sprint number	-0.172	-0.132	-0.149	-0.102	0.339*	0.419*	0.364*	0.332*
	Small	Small	Small	Small	Moderate	Moderate	Moderate	Moderate
Sprinting (m)	-0.118	-0.060	-0.073	-0.016	0.409*	0.420*	0.447*	0.359*
	Small	Trivial	Trivial	Trivial	Moderate	Moderate	Moderate	Moderate
High-speed (m)	-0.195	-0.133	-0.139	-0.079	0.239	0.434*	0.346*	0.437*
	Small	Small	Small	Trivial	Small	Moderate	Moderate	Moderate
Total contacts	-0.204	-0.309	-0.146	-0.238	-0.097	0.113	0.080	0.363*
	Small	Moderate	Small	Small	Trivial	Small	Trivial	Moderate

Level of significance *p < 0.05.

Effect Sizes <0.10 trivial, 0.10-0.29 small, 0.30-0.49 moderate, 0.50-0.69 large, 0.70-0.89 very large, 0.90-0.99 nearly perfect.

ΔCK change in creatine kinase; Δ% CK percentage change in creatine kinase; m metres.