Table 2.

Respiratory gas exchange variables for each trial. Values are expressed in mean ± SD.

Variable	Trial	Phase 1	Phase 2	Phase 3	Phase 4
VO2 mL·min−1	Act.	1805 *	1954 *	2039 *	1332 *
	Pass.	1080	1025	1170	1257
VCO2 mL·min−1	Act.	2130 *	2228 *	2305 *	1985 *
	Pass.	1589	1436	1510	1622
RER No unit	Act.	1.18 *	1.14 *	1.13 *	1.49 *
	Pass.	1.47	1.40	1.29	1.29

* significant differences from PR (p < 0.01).