Use the Back button in your browser to see the other results of your search or to select another record.

Detailed Search Results

What is the effect of aerobic exercise intensity on cardiorespiratory fitness in those undergoing cardiac rehabilitation? A systematic review with meta-analysis [with consumer summary]
Mitchell BL, Lock MJ, Davison K, Parfitt G, Buckley JP, Eston RG
British Journal of Sports Medicine 2019 Nov;53(21):1341-1351
systematic review

OBJECTIVE: Assess the role of exercise intensity on changes in cardiorespiratory fitness (CRF) in patients with cardiac conditions attending exercise-based cardiac rehabilitation. DESIGN: Systematic review with meta-analysis. DATA SOURCES: Medline, Embase, CINAHL, SPORTDiscus, PsycINFO and Web of Science. ELIGIBILITY CRITERIA FOR SELECTION: Studies assessing change in CRF (reported as peak oxygen uptake; VO2peak) in patients post myocardial infarction and revascularisation, following exercise-based cardiac rehabilitation. Studies establishing VO2peak via symptom-limited exercise test with ventilatory gas analysis and reported intensity of exercise during rehabilitation were included. Studies with mean ejection fraction < 40% were excluded. RESULTS: 128 studies including 13,220 patients were included. Interventions were classified as moderate, moderate-to-vigorous or vigorous intensity based on published recommendations. Moderate and moderate-to-vigorous-intensity interventions were associated with a moderate increase in relative VO2peak (standardised mean difference +/- 95% CI 0.94 +/- 0.30 and 0.93 +/- 0.17, respectively), and vigorous-intensity exercise with a large increase (1.10 +/- 0.25). Moderate and vigorous-intensity interventions were associated with moderate improvements in absolute VO2peak (0.63 +/- 0.34 and 0.93 +/- 0.20, respectively), whereas moderate-to-vigorous-intensity interventions elicited a large effect (1.27 +/- 0.75). Large heterogeneity among studies was observed for all analyses. Subgroup analyses yielded statistically significant, but inconsistent, improvements in CRF. CONCLUSION: Engagement in exercise-based cardiac rehabilitation was associated with significant improvements in both absolute and relative VO2peak. Although exercise of vigorous intensity produced the greatest pooled effect for change in relative VO2peak, differences in pooled effects between intensities could not be considered clinically meaningful. REGISTRATION: PROSPERO CRD42016035638.
Reproduced with permission from the BMJ Publishing Group.

Full text (sometimes free) may be available at these link(s):      help