AI Energy Pacing for Chronic Illness

In ME/CFS, PEM means symptoms worsen after physical or mental exertion that would previously have been tolerated; symptoms often worsen 12 to 48 hours later and may last days or weeks. The CDC says activity management, commonly called pacing, can help mitigate PEM by balancing rest and activity. A person’s limits can differ and change, so planning should reflect their own experience and clinical context. This guidance concerns ME/CFS; it should not be generalized to every chronic illness or treated as a cure. Long COVID can involve post-exertional symptom worsening, but an ME/CFS tool or protocol should not be assumed to fit every person with long COVID. An activity diary can record what someone did, how long it took, rest periods, symptoms, and when symptoms changed. Software may help organize those entries or show patterns for discussion with a health professional. A correlation in a personal log does not prove that an activity caused symptoms, and missing entries can distort the picture. An app should not prescribe exercise, set a universal heart-rate ceiling, or tell someone to push through symptoms. Wearables can be uncomfortable, inaccurate, or burdensome; provide manual logging and rest-friendly controls. The most useful design supports the person’s own choices: low-effort logging, flexible reminders, accessible summaries, and control over sharing. Symptoms and capacity vary, so app outputs should be treated as observations rather than medical advice. People should be able to pause tracking without losing their information, correct a record, or ask a clinician to interpret trends. Any activity changes should be individualized with appropriate clinical support, particularly when symptoms worsen or the person has severe illness or orthostatic intolerance.