Table 2. Association between 6-minute walk test parameters and submaximal exercise performance.

	Distance (m)			% predicted			D·W
	r	P value		r	P value		r	P value
ΔVO2 (mL/min)	0.61	<0.001		0.36	0.034		0.74	<0.001
VCO2 (mL/min)	0.63	<0.001		0.37	0.029		0.79	<0.001
RER	0.13	0.439		-0.008	0.960		0.21	0.239
METS	0.67	<0.001		0.48	0.004		0.69	<0.001
VE (L/min)	0.54	0.001		0.29	0.089		0.69	<0.001
VE/VCO2	-0.28	0.101		-0.23	0.189		-0.22	0.210
BR (%)	-0.10	0.567		0.05	0.749		-0.27	0.140
ΔRPE, dyspnea	0.38	0.030		0.35	0.045		0.44	0.012
ΔRPE, limb discomfort	0.21	0.229		0.17	0.348		0.45	0.007

Pearson’s correlation test was used to investigate the associations. D·W: body weight-walking distance product; Δ: change from rest to the steady-state; VO₂, oxygen uptake; VCO₂: carbon dioxide output; RER: respiratory exchange ratio; METS: metabolic equivalents; VE: ventilatory equivalent; VE/VCO₂: ventilatory equivalent of carbon dioxide; BR: breathing reserve; RPE: Borg rating of perceived exertion scale.