Pacing

Why pacing comes first

The strongest finding in ME/CFS research is a negative one: doing more than your body can handle makes you worse, and nothing reliably reverses that damage. Some examples from 2026:

Charité, Berlin: even a specialised rehabilitation programme built around pacing and personal limits left 42 of 97 participants worse off. Controlled
A multidisciplinary rehab trial (July 2026): 45% got worse on a disability scale. Only 14% improved. Controlled
Graded exercise therapy (GET), standard advice for decades, is now recognised as harmful for ME/CFS.

Your energy envelope

Think of your available energy as an envelope, or a daily budget. Pacing means spending inside it:

Everything costs energy. Walking, standing, showering, cooking, reading, screens, phone calls, decisions, worry, noisy rooms, excitement.
Your envelope changes. It shrinks with infections, stress, poor sleep and after crashes.
Overspending gets charged with interest. PEM means you pay back more than you borrowed, a day or two later.

Practical pacing strategies

Set your cap for your bad days. Plan an amount of activity you could manage even on a bad day.
Break tasks up. Shower sitting down. Cook in stages. Split phone calls.
Rest before you’re exhausted. Schedule rest breaks, ideally lying down with your eyes closed and low stimulation.
Alternate types of activity. Physical, then mental, then rest.
Sit or lie down wherever possible. Being upright is itself an effort for many people (see POTS).
Reduce sensory load. Try earplugs, eye masks, sunglasses, dim lights.
Say no, or “not today”. Protecting your energy is legitimate.
Use aids without guilt. A shower chair, wheelchair for outings, online shopping, or a disability parking permit all save energy for things you care about.

Using heart rate to pace

Many people use a heart rate monitor to spot over-exertion in real time, because the body often goes over its limit before you feel it.

A common rule of thumb is to keep your heart rate below about your resting heart rate + 15 beats per minute during activity, especially early on. Other formulas exist. Work out what suits you with your care team.
Set your watch or app to alert you when you go over that ceiling.
A drop in your morning heart rate variability (HRV) often shows up 1–2 days before a crash. It’s an early warning to take it easier.

See Wearables & tracking for devices that do this well.

Boom-bust and the good-day trap

Boom-bust

Boom-bust is spending a good day’s energy, then paying for it with a crash, again and again. It’s the most common path into a deeper illness.

The good-day trap

Symptoms in ME/CFS go up and down a lot. A run of good days can happen whether or not anything has changed. If you read a good day as “I’m getting better” and spend it (gardening, a big social evening, catching up on jobs), the crash typically arrives 1–3 days later.

The opposite trap: fear-avoidance

Some clinicians also warn about the opposite problem: avoiding everything out of fear of a crash. The goal isn’t to do nothing. It’s to do what you can without triggering PEM, and to rest well. If you’re unsure where your limits are, tracking helps (see below).

Tracking: the n=1 approach

You’re the only person who can see how your body responds, and tracking turns guesswork into evidence.

A minimum daily log (takes 30 seconds each night):

Energy today (0–10)
Brain fog today (0–10)
Did I crash? (yes/no)
What I did today (brief notes)
Sleep quality
The start date of any new supplement or medication

Add if you have a wearable: morning HRV and resting heart rate.

After 4–8 weeks, look at averages rather than single days. Are good days becoming more frequent? Do crashes follow big days? It’s also very useful to show your doctor.

An example clinic framework

Some allied health clinics that specialise in ME/CFS, such as Active Health Clinic in Melbourne (with telehealth available), use a structured programme. Common elements include:

Stabilise first: pace and stop the boom-bust cycle before anything else
Then work on the pillars: triggers, sleep and the autonomic nervous system
Then plan for setbacks and gradual goals
An hour-by-hour activity diary, colour-coded by how much effort each activity took rather than by how you felt, with symptom ratings at the start and end of each day. It’s very useful for spotting boom-bust patterns.

Avoiding infections

A new infection, especially COVID-19, is the most common trigger for a major relapse. Reasonable protective steps:

Wear a mask in crowded indoor spaces
Stay up to date with COVID-19 and flu vaccines (discuss timing with your doctor)
Ask visitors to stay away if they’re even mildly unwell
Prioritise ventilation, and outdoor catch-ups where possible

Work, study and support

Talk to your employer or school about reasonable adjustments: reduced hours, working from home, rest breaks, flexible deadlines.
In Australia, a GP-arranged Chronic Condition Management Plan can subsidise allied health, such as an occupational therapist who understands pacing. See Getting care in Australia.