Table 2.

Stability of Metabolic and Ventilatory Responses to Interval Exercise at Temporally Matched Time Points in Severe COPD Patients

	30% total time	60% total time	90% total time
VO2 (L/min)	0.74 ± 0.04	0.77 ± 0.05	0.78 ± 0.04*
VE (L/min)	31.1 ± 1.6	32.0 ± 1.8	32.7 ± 2.2*
IC(L)	1.55 ± 0.08	1.61 ± 0.08	1.59 ± 0.08*

Data are presented as mean ± SEM. VO₂: oxygen uptake; VE: minute ventilation; IC: inspiratory capacity.

^*No significant differences were found between the different time points during interval exercise. Modified from the European Respiratory Society.²⁶