Clague-Baker, Nicola, Davenport, Todd E, Madi, Mohammad et al. · Work (Reading, Mass.) · 2023 · DOI
This study asked 488 people with ME about their experiences using heart rate monitors to help manage their activity levels. Heart rate monitors can help you stay within a safe activity zone that doesn't trigger post-exertional malaise (the worsening of symptoms after activity). Most people in the study found that heart rate monitors helped them understand their condition better, reduce symptom severity, and even gradually increase what they could do—including returning to some work. However, people also reported challenges, so more research and better training for doctors is needed.
This is the largest study to date examining real-world experiences with heart rate monitor pacing in ME/CFS, providing evidence supporting a practice recommended in clinical guidelines but lacking robust research validation. The findings suggest HRM may help patients manage PEM more effectively and maintain or improve function, addressing a critical gap in non-pharmacological management strategies. These patient-reported outcomes can inform both clinical practice and design of future controlled trials.
This study does not establish causation or determine whether HRM is more effective than other pacing strategies, as it lacks a control group or randomized design. Self-reported symptom improvement could reflect recall bias, placebo effects, or increased monitoring awareness rather than true physiological benefit. The study cannot identify which specific HR thresholds or monitoring approaches are most effective, nor does it define the mechanisms by which HRM might reduce PEM.
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
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