Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 646-651 |
| Journal | Medicine and Science in Sports and Exercise |
| Volume | 49 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2017 |
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Eccentric cycling : A promising modality for patients with chronic heart failure. / Chasland, L.C. C.; Green, Daniel J.; Maoirana, A.J. J.; Nosaka, K.; Haynes, Andy; Dembo, L.; Naylor, Louise H.
In: Medicine and Science in Sports and Exercise, Vol. 49, No. 4, 2017, p. 646-651.Research output: Contribution to journal › Article
TY - JOUR
T1 - Eccentric cycling
T2 - A promising modality for patients with chronic heart failure
AU - Chasland, L.C. C.
AU - Green, Daniel J.
AU - Maoirana, A.J. J.
AU - Nosaka, K.
AU - Haynes, Andy
AU - Dembo, L.
AU - Naylor, Louise H.
PY - 2017
Y1 - 2017
N2 - Purpose: Chronic heart failure (CHF) is characterized by dyspnea and poor exercise tolerance, which decreases aerobic capacity (VO2peak), a measure strongly correlated with quality of life and mortality. In healthy populations, eccentric (ECC) cycling can be performed at a lower oxygen demand for matched workload, compared with concentric (CON) cycling, but few studies have previously investigated ECC cycling in CHF. We hypothesized that, when matched for external workload (W), an ECC cycling bout would be performed at a lower cardiorespiratory load (VO2) than CON in patients with CHF. Methods: Eleven CHF patients (10 males) with impaired left ventricular systolic function (ejection fraction 31% ± 12%) completed a CON VO2peak test, with the subsequent ECC and CON protocols set at 70% of individual maximal CON power (W). Oxygen consumption (VO2), RER, minute ventilation (VE), HR, and rate pressure product were compared between conditions. Results: ECC was performed at a lower VO2 (12.3 ± 1.3 vs 14.1 ± 0.8 mL kg-1 min-1, P = 0.01), RER (0.92 ± 0.02 vs 0.96 ± 0.01, P = 0.01), and VE (36.5 ± 4.4 vs 40.2 ± 2.0 L min-1, P = 0.04) in comparison with CON, despite both conditions being performed at matched workloads. HR (101 ± 5 vs 96 ± 1 bpm, P = 0.06) and rate pressure product (13,539 ± 788 vs 11,911 ± 227 bpmImm Hg-1, P = 0.15) were not significantly different between conditions. Conclusion: When matched for external workload, ECC cycling can be performed with a lower oxygen demand than CON in patients with CHF. Eccentric cycling is a promising modality for cardiac rehabilitation in severely deconditioned patients with CHF Copyright © 2016 by the American College of Sports Medicine.
AB - Purpose: Chronic heart failure (CHF) is characterized by dyspnea and poor exercise tolerance, which decreases aerobic capacity (VO2peak), a measure strongly correlated with quality of life and mortality. In healthy populations, eccentric (ECC) cycling can be performed at a lower oxygen demand for matched workload, compared with concentric (CON) cycling, but few studies have previously investigated ECC cycling in CHF. We hypothesized that, when matched for external workload (W), an ECC cycling bout would be performed at a lower cardiorespiratory load (VO2) than CON in patients with CHF. Methods: Eleven CHF patients (10 males) with impaired left ventricular systolic function (ejection fraction 31% ± 12%) completed a CON VO2peak test, with the subsequent ECC and CON protocols set at 70% of individual maximal CON power (W). Oxygen consumption (VO2), RER, minute ventilation (VE), HR, and rate pressure product were compared between conditions. Results: ECC was performed at a lower VO2 (12.3 ± 1.3 vs 14.1 ± 0.8 mL kg-1 min-1, P = 0.01), RER (0.92 ± 0.02 vs 0.96 ± 0.01, P = 0.01), and VE (36.5 ± 4.4 vs 40.2 ± 2.0 L min-1, P = 0.04) in comparison with CON, despite both conditions being performed at matched workloads. HR (101 ± 5 vs 96 ± 1 bpm, P = 0.06) and rate pressure product (13,539 ± 788 vs 11,911 ± 227 bpmImm Hg-1, P = 0.15) were not significantly different between conditions. Conclusion: When matched for external workload, ECC cycling can be performed with a lower oxygen demand than CON in patients with CHF. Eccentric cycling is a promising modality for cardiac rehabilitation in severely deconditioned patients with CHF Copyright © 2016 by the American College of Sports Medicine.
U2 - 10.1249/MSS.0000000000001151
DO - 10.1249/MSS.0000000000001151
M3 - Article
VL - 49
SP - 646
EP - 651
JO - Medicine & Science in Sports & Exercise
JF - Medicine & Science in Sports & Exercise
SN - 0195-9131
IS - 4
ER -