Table 2. Multilevel mixed-effects models examining associations between continuous ApP and external load variables

Variable	Fixed effect β (ApP)	95% CI	p-value	Position effect p	ApP × Position p	Session variance
TD	-0.0150	-0.062 to 0.031	0.513	> 0.05	> 0.05	176.8
HSR	0.0360	0.008 to 0.064	0.013	> 0.05	> 0.05	53.8
SPRINT	0.0068	0.001 to 0.013	0.020	> 0.05	> 0.05	3.8
NSPRINTS	0.0005	0.0001 to 0.0009	0.015	> 0.05	> 0.05	0.017
ACC	ns	ns	> 0.05	> 0.05	> 0.05	~0
DEC	ns	ns	> 0.05	> 0.05	> 0.05	~0
HMLD	0.0820	0.015 to 0.149	0.017	> 0.05	> 0.05	528.0
%MSPEED	0.0410	0.006 to 0.076	0.023	> 0.05	> 0.05	180.0

Linear mixed-effects models included repeated observations nested within players with additional session-level clustering. ApP was modelled as a continuous predictor. β = fixed-effect estimate for ApP. CI = confidence interval. ns = non-significant.