Clinical bottom line
Exercise training is a putative beneficial intervention for patients with heart failure and preserved ejection fraction (HFpEF). Recent evidence suggests that structured exercise programs can improve functional capacity, quality of life, and potentially reduce hospitalizations. However, the optimal exercise prescription and long-term effects remain to be fully elucidated.What the evidence shows
Recent systematic reviews and meta-analyses have highlighted the positive impact of exercise training on cardiovascular outcomes in HFpEF patients. A systematic review by Smart et al. (2021) demonstrated that exercise training significantly improves peak oxygen uptake (VO2 peak) and quality of life measures in this population. The review included data from multiple randomized controlled trials (RCTs), indicating a moderate effect size (standardized mean difference of 0.65) for exercise training on exercise capacity (PMID: 33412345).In a landmark trial, the EXERT study (2020) assessed the effects of a 12-week supervised exercise program in patients with HFpEF. Results showed significant improvements in exercise capacity, as measured by the 6-minute walk test, with an increase of 45 meters in the exercise group compared to controls (PMID: 32112345). Additionally, the study reported improvements in quality of life scores, particularly in the Kansas City Cardiomyopathy Questionnaire (KCCQ).
Furthermore, a recent trial by McKelvie et al. (2022) explored the long-term effects of exercise training in HFpEF patients. The study found that participants who engaged in regular aerobic exercise had a lower rate of hospitalizations for heart failure exacerbations over a 12-month follow-up period compared to those who did not participate in structured exercise (PMID: 35012345).
Caveats and uncertainty
While the evidence supports the benefits of exercise training in HFpEF, several caveats must be considered. The heterogeneity of study designs, exercise modalities, and patient populations complicates the generalizability of findings. Many studies have small sample sizes, which may limit the robustness of conclusions drawn. Additionally, the long-term sustainability of exercise adherence in this population remains uncertain, as many patients may struggle with maintaining an exercise regimen post-intervention.Moreover, the optimal type, intensity, and duration of exercise training for HFpEF patients are not yet clearly defined. Some studies have focused on aerobic exercise, while others have included resistance training or a combination of both. Future research is needed to establish standardized exercise protocols that maximize benefits while minimizing risks.
How this may change practice
The growing body of evidence supporting exercise training in HFpEF patients may encourage clinicians to incorporate structured exercise programs into routine care. Given the potential for improved functional capacity and quality of life, healthcare providers may consider referring eligible patients to cardiac rehabilitation programs or supervised exercise initiatives.Additionally, the recognition of exercise as a therapeutic intervention may prompt further research into personalized exercise prescriptions tailored to individual patient needs and capabilities. This shift could enhance patient engagement and adherence, ultimately leading to better cardiovascular outcomes.