TABLE 3a.

Athletes’ performance regression analysis.

Model	Predictor	b	SE	β	t	p-value	VIF
1	Constant	4.81	0.35		13.78	0.00
	Athletes’ boredom proneness	–0.51	0.09	–0.42	–5.27	0.00	1.00
2	Constant	–95.49	45.63		–2.09	0.00
	Athletes’ boredom proneness	–0.49	0.09	–0.41	–5.11	0.00	1.03
	Athletes’ gender	0.06	0.26	0.02	0.24	0.81	1.06
	Tenure	0.02	0.02	0.05	0.58	0.56	1.23
	Age	0.05	0.02	0.19	2.19	0.03	1.24
	Type of sport discipline	0.04	0.03	0.13	1.58	0.12	1.05

Model 1: R² = 0.18; R-square change = 0.18; F-value = 27.76, p < 0.001. Model 2: R² = 0.23; R² change = 0.05; F-value = 7.48, p < 0.001.