The Physiologic Effects of an Acute Bout of Supramaximal High-Intensity Interval Training Compared with a Continuous Exercise Bout in Patients with COPD

Table 3

Exercise physiologic and perceptual data.

	HIIT-end	HIIT-isowork	CWR
HR (bpm)	121 ± 31	101 ± 36	120 ± 29
𝑉𝐸 (L·min^−1)	39 ± 11	32 ± 15*	41 ± 13
𝑉O2 (L·min^−1)	1.03 ± 0.26	0.97 ± 0.36	1.05 ± 0.41
IC (%TLC)	25 ± 6	38 ± 6*	27 ± 8
𝑆𝑃O2 (%)	92 ± 3	94 ± 2	92 ± 2
Dyspnea	5.7 ± 1.8	4.9 ± 1.6	5.8 ± 1.4
Exertion	4.2 ± 1.6	3.4 ± 1.3*	4.3 ± 0.4
Reason for cessation (𝑛)	Dyspnea 9; Leg fatigue 3; Both 2	N/A	Dyspnea 8; Leg fatigue 3; Both 3

^∗𝑃<0.05 versus HIIT-end. HR: heart rate; 𝑉_𝐸: ventilation; 𝑉O₂: rate of oxygen consumption; IC: inspiratory capacity; 𝑆_𝑃O₂: oxygen saturation; HIIT: high-intensity interval training session; CWR: constant work rate session.