Table 4.

Coefficients of determination and their changes for two regression models used to predict forearm and local cutaneous blood flow and vascular conductance during light and moderate exercise

			Slope Coefficients
Dependent Variable	Model	Intercept, Constant	ΔT̄b	∑skf	V̇o2peak	Specific AD	r2	Δr2
Light work
Forearm blood flow	1	4.81	0.90	0	0.01		0.03
	2	−9.44	0.13	0.02	0.02	0.05	0.46*	0.43†
Local cutaneous blood flow	1	223.57	133.73	−0.85	−0.75		0.08
	2	−770.40	90.62	0.77	0.40	3.14	0.32*	0.24†
Forearm vascular conductance	1	0.04	0.02	0	0		0.05
	2	−0.15	<0.01	0	0	<0.01	0.51*	0.46†
Local cutaneous vascular conductance	1	223.49	86.45	−0.65	−0.90		0.05
	2	−782.49	48.82	0.99	0.26	3.181	0.31*	0.27†
Moderate work
Forearm blood flow	1	11.44	−4.03	0.01	−0.02		0.07
	2	−6.24	−3.73	0.04	<−0.01	0.06	0.18	0.11
Local cutaneous blood flow	1	448.31	−55.00	−0.80	−1.09		0.02
	2	−428.60	−51.16	0.84	0.13	2.64	0.13	0.11
Forearm vascular conductance	1	0.10	−0.05	0	0		0.10
	2	−0.11	−0.05	0	0	<0.01	0.24	0.14†
Local cutaneous vascular conductance	1	551.15	−8.41	−1.28	−1.66		0.02
	2	−512.93	−3.75	0.72	−0.18	3.20	0.14	0.12

r², coefficient of determination; Δr², change in the coefficient of determination. Model 1 included the change in mean body temperature (ΔT̄_b), height-adjusted sum of skinfolds (∑skf), and peak oxygen consumption (V̇o_2peak); model 2 included those variables and the mass-specific surface area (specific A_D).

^*Significant predictors of thermoeffector responses; † significant changes in r² between the two models (P < 0.05). Local cutaneous blood flows and vascular conductances were not determined in all participants (see methods). Light work n = 33; moderate work n = 28.