Margaret K Covey1, Eileen G Collins2, Sandra I Reynertson3, Daniel F Dilling4. 1. Department of Biobehavioral Health Science, University of Illinois at Chicago, Chicago, IL, United States. Electronic address: mkcovey@uic.edu. 2. Department of Biobehavioral Health Science, University of Illinois at Chicago, Chicago, IL, United States; Department of Research and Development, Edward Hines Jr Veterans Administration Hospital, Hines, IL, United States. 3. Medicine Service Line at Edward Hines Jr Veterans Administration Hospital, Hines, IL, United States; Department of Medicine, Division of Clinical Cardiology, Loyola University, Stritch School of Medicine, Maywood, IL, United States. 4. Department of Medicine, Division of Pulmonary and Critical Care Medicine, Loyola University, Stritch School of Medicine, Maywood, IL, United States.
Abstract
PURPOSE:Aerobic exercise training is a recognized approach for improving functional capacity in COPD. People with greater disease severity often have difficulty achieving higher aerobic exercise training intensity. The effects of resistance training prior to aerobic training were examined to determine if this sequential approach was associated with greater gains in functional status than aerobic training alone or concurrent aerobic and resistance training. METHODS: Patients were randomized to: 1) sequential resistance then aerobic training (RT-then-AT) (8 weeks resistance training followed by 8 weeks aerobic exercise training), 2) control group (CE-then-AT + RT) (8 weeks of 'sham' training followed by 8 weeks concurrent aerobic and resistance training), 3) control group (CE-then-AT) (8 weeks 'sham' training followed by 8 weeks aerobic training). Outcomes were assessed at study entry, after week 8, and after week 16: aerobic exercise performance; muscle strength and endurance. RESULTS: 75 patients completed training: FEV1 %pred 40 ± 10, V˙O(2peak) %predicted, 71 ± 22, fat-free mass index 19.5 ± 3.1. RT-then-AT had greater acquisition of peripheral muscle endurance than CE-then-AT + RT and CE-then-AT, but improvements in aerobic exercise performance were similar. Improvements in muscle strength were similar between RT-then-AT and CE-then-AT + RT. Sarcopenia was associated with poorer attendance, and lower aerobic and resistance training volumes. CONCLUSION: Although the sequential approach to resistance and aerobic training yielded a greater increase in muscle endurance and higher resistance training volume compared to concurrent resistance and aerobic training, other training outcomes were similar between the two groups, thus the sequential approach is not clearly superior to the concurrent approach in severe COPD. ClinicalTrials.gov Identifier: NCT01058213.
RCT Entities:
PURPOSE: Aerobic exercise training is a recognized approach for improving functional capacity in COPD. People with greater disease severity often have difficulty achieving higher aerobic exercise training intensity. The effects of resistance training prior to aerobic training were examined to determine if this sequential approach was associated with greater gains in functional status than aerobic training alone or concurrent aerobic and resistance training. METHODS:Patients were randomized to: 1) sequential resistance then aerobic training (RT-then-AT) (8 weeks resistance training followed by 8 weeks aerobic exercise training), 2) control group (CE-then-AT + RT) (8 weeks of 'sham' training followed by 8 weeks concurrent aerobic and resistance training), 3) control group (CE-then-AT) (8 weeks 'sham' training followed by 8 weeks aerobic training). Outcomes were assessed at study entry, after week 8, and after week 16: aerobic exercise performance; muscle strength and endurance. RESULTS: 75 patients completed training: FEV1 %pred 40 ± 10, V˙O(2peak) %predicted, 71 ± 22, fat-free mass index 19.5 ± 3.1. RT-then-AT had greater acquisition of peripheral muscle endurance than CE-then-AT + RT and CE-then-AT, but improvements in aerobic exercise performance were similar. Improvements in muscle strength were similar between RT-then-AT and CE-then-AT + RT. Sarcopenia was associated with poorer attendance, and lower aerobic and resistance training volumes. CONCLUSION: Although the sequential approach to resistance and aerobic training yielded a greater increase in muscle endurance and higher resistance training volume compared to concurrent resistance and aerobic training, other training outcomes were similar between the two groups, thus the sequential approach is not clearly superior to the concurrent approach in severe COPD. ClinicalTrials.gov Identifier: NCT01058213.
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