Table 2.

Summary of estimated model parameters for models: median (1st quartile, 3rd quartile) ratings of perceived exertion and dyspnea, using Borg CR-10 scale or using Dalhousie scales.

Quadratic-delay model: S = a + b1 (I-d)+ + b2 ((I-d)+)2
Parameters	Dalhousie-leg exertion vs %Wmax	Borg-exertion vs %Wmax	Dalhousie-breath effort vs %max V̇E	Borg-dyspnea vs %max V̇E
Intercept (a)	1.18 (1.0,2.0)	0.39 (0.0, 0.6)	1.06 (1.0, 1.6)	0.38 (0.03, 0.6)
Delay (d)	0.26 (0.2, 0.4)	0.40 (0.3, 0.5)	0.28 (0.2, 0.4)	0.34 (0.24, 0.5)
Coefficient of linear term (b1)	4.32 (2.4, 7.0)	7.01 (3.2, 11.9)	6.24 (4.2, 8.2)	7.25 (3.3, 11.9)
Coefficient of quadratic term (b2)	0.0 (−3.2, 2.9)	0.0 (−4.3, 5.8)	-2.19 (−6.0, 0.5)	0.0 (−6.2, 2.8)
RMSE	0.23 (0.2,0.3)	0.25 (0.2, 0.4)	0.24 (0.2, 0.3)	0.25 (0.2, 0.4)

Power-delay model: S = a + b (I-d)c
Parameters	Dalhousie-leg exertion vs %Wmax	Borg-exertion vs %Wmax	Dalhousie-breath effort vs %max V̇E	Borg-dyspnea vs%max V̇E
Intercept (a)	1.20 (1.0,2.0)	0.36 (0.0, 0.6)	1.02 (1.0, 1.6)	0.38 (0.06, 0.7)
Delay (d)	0.25 (0.2, 0.4)	0.30 (0.2, 0.4)	0.30 (0.2, 0.4)	0.34 (0.24, 0.4)
Coefficient of power term (b)	4.89 (3.5, 6.2)	6.99 (5.4, 10.5)	4.22 (2.9, 6.0)	6.81 (4.2, 9.8)
Exponent (c)	0.97 (0.6, 1.5)	1.03 (0.8, 1.8)	0.69 (0.3, 1.0)	0.88 (−0.6, 2.8)
RMSE	0.22 (0.2,0.3)	0.23 (0.1, 0.4)	0.23 (0.1, 0.3)	0.25 (0.2, 0.4)