The Physiologic Effects of an Acute Bout of Supramaximal High-Intensity Interval Training Compared with a Continuous Exercise Bout in Patients with COPD. (24th October 2013)

• Record Type: Journal Article
• Authors: Butcher, Scotty J.; Yurach, Madison T.; Heynen, Nichole M.; Pikaluk, Brendan J.; Horvey, Karla J.; Clemens, Ron; Marciniuk, Darcy D.
• Other Names: Dumitrascu Rio Academic Editor.
• Is Part Of: Journal of respiratory medicine. Volume 2013(2013)
• Publication Date: 2013-10-24
• Subjects: Respiratory organs -- Diseases -- Periodicals; Respiratory organs -- Diseases; Respiratory Tract Diseases; Electronic journals; Periodicals; 616.2
• DOI: 10.1155/2013/879695
• Languages: English
• ISSNs: 2356-7619

Abstract

Abstract : This study compared physiological responses and work performed during a supramaximal high-intensity interval exercise training session (HIIT) and a constant work rate (CWR) exercise session. Fourteen patients with COPD (mean FEV1 53 ± 13 % predicted (±SD)) completed an incremental cardiopulmonary exercise test (CPET) and a steep ramp anaerobic test (SRAT) and then two exercise bouts to symptom limitation on separate days, in random order: (1) a CWR trial at 80% of CPET peak work rate (mean63 ± 15 W) and (2) a HIIT trial using repeats of 30 s at 70% of SRAT peak work rate (mean112 ± 29 W) followed by 90 s at 20% of CPET peak work rate. Subjects ceased exercise primarily due to dyspnea for both HIIT and CWR (64% vs. 57%, resp.). End-exerciseV E, HR, dyspnea, and leg fatigue were similar between the two exercise protocols. Average work rate was lower in HIIT than CWR (32 vs. 63 W, P < 0.05 ); however, subjects performed HIIT longer (542 vs. 202 s, P < 0.05 ) and for greater total work (23.3 vs. 12.0 kJ, P < 0.05 ). The supramaximal HIIT protocol was well tolerated and demonstrated similar maximal physiologic responses to constant work rate exercise, but with greater leg muscle work performed and greater peak exercise intensity.