Dispositional self-control: relationships with aerobic capacity and morning surge in blood pressure

Figures & data

Table 1. Means, standard deviations and correlations among study variables.

Variable	M ± SD	1	2	3	4	5	6	7
1. BSCS	42.63 ± 9.13	1	.20^a	−.27^a	−.04	−.09	−.43^a	−.45^a
2. VO2max	32.94 ± 10.66	–	1	−.20^a	−.24^a	−.22^a	−.10	−.16
3. HR	73.85 ± 10.45	–	–	1	.27^a	.38^a	−.11	−.07
4. SBP	112.07 ± 9.18	–	–	–	1	.77^a	−.06	−.02
5. DBP	69.89 ± 6.59	–	–	–	–	1	−.12	−.08
6. SMBPS (mmHg)	40.93 ± 20.37	–	–	–	–	–	1	.71^a
7. DMBPS (mmHg)	45.15 ± 20.42	–	–	–	–	–	–	1

^a p < .05. BSCS: Brief Self-Control Scale; VO_2max : maximal oxygen consumption; HR: average 24-h ambulatory heart rate; SBP: average 24-h systolic blood pressure; DBP: average 24-h systolic blood pressure; SMBPS: systolic morning blood pressure surge; DMBPS: diastolic morning blood pressure surge.

Figure 1. Regression of systolic and diastolic morning blood pressure surge on self-control scores.

Table 2. Hierarchical multiple regression analyses of morning blood pressure surge indices.

Criterion	Model	Predictor	B	sr	p	R^2	ΔR^2	Model F
Systolic MBPS	Model 1	SBP	−.25	−.13	.438	.05		F(3, 74) = 0.92, p = .436
		VO2max	−.37	−.16	.316
	Model 2	SBP	−.20	−.10	.476	.28	.24	ΔF(1, 73) = 11.89, p < .001
		VO2max	−.25	−.11	.441
		BSCS	−.98	−.45	<.001
Diastolic MBPS	Model 1	DBP	−.16	−.05	.752	.01		F(3, 74) = 0.25, p = .861
		VO2max	−.26	−.09	.573
	Model 2	DBP	−.14	−.05	.754	.26	.25	ΔF(1, 73) = 12.23, p < .001
		VO2max	−.11	.04	.795
		BSCS	−1.23	−.50	<.001

VO_2max: maximal oxygen consumption; BSCS: Brief Self-Control Scale; SBP: average 24-h systolic blood pressure; DBP: average 24-h systolic blood pressure; MBPS: morning blood pressure surge.

Figure 2. Self-control scores according to systolic and diastolic morning blood pressure surge quartiles (with 95% CI).