An international survey of experiences and attitudes towards pacing using a heart rate monitor for people with myalgic encephalomyelitis/chronic fatigue syndrome. — CFSMEATLAS
An international survey of experiences and attitudes towards pacing using a heart rate monitor for people with myalgic encephalomyelitis/chronic fatigue syndrome.
Clague-Baker, Nicola, Davenport, Todd E, Madi, Mohammad et al. · Work (Reading, Mass.) · 2023 · DOI
Quick Summary
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.
Why It Matters
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.
Observed Findings
Heart rate monitors were associated with reduced severity of ME symptoms and reduced severity and duration of post-exertional malaise episodes.
Participants reported >30 different benefits including improved understanding of PEM triggers and capacity limits.
Participants reported >30 different challenges and limitations to using HRM.
Over 100 different types of heart rate monitors were being used by study participants.
Participants reported ability to increase activities including return to work using HRM guidance.
Inferred Conclusions
Heart rate monitor-guided pacing may be a valuable self-management tool for people with ME to understand and manage PEM.
HRM appears to support gradual activity expansion while reducing exacerbation severity and duration.
Significant variability in monitor types and user experiences suggests need for standardization and clinical guidance.
Health care professionals need better education on safe HRM implementation for ME/CFS management.
Remaining Questions
What is the optimal heart rate threshold (ventilatory anaerobic threshold) for individual patients, and how should it be determined?
What This Study Does Not Prove
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.