Table 2 Omnibus F tests in linear mixed models for training effects on self-reported and HPA axis stress responses.

Removing the covariates from a respective model did not change the pattern of significance.

	STAI		Cortisol
Fixed effects
	F (df)	P	F (df)	P
Intercept (peak)
Intercept	13180.99 (473)	≤0.001	1450.30 (303)	≤0.001
Group	8.43 (477)	≤0.001	5.26 (304)	≤0.001
Baseline	113.00 (476)	≤0.001	15.74 (304)	≤0.001
Sex/hormones	2.76 (283)	0.098	9.79 (300)	≤0.001
Age	0.72 (283)	>0.300	0.85 (300)	>0.300
Time of day			11.37 (300)	≤0.001
Recovery slope
Intercept	770.32 (480)	≤0.001	653.77 (307)	≤0.001
Group	8.68 (480)	≤0.001	2.10 (307)	0.080
Baseline	2.51 (480)	>0.100	5.09 (308)	0.025
Random effects
	Estimate (SE)		Estimate (SE)
Subject	25.53 (2.66)		0.40 (0.03)
Recovery slope	0.005 (.003)		≤0.001 (≤0.001)