What Is Pacing, and Why Your Doctor Has Probably Never Explained It Properly

Pacing is the practice of managing activity within your actual energy envelope rather than pushing past it. It exists because post-exertional malaise means exertion beyond capacity worsens symptoms 12 to 48 hours later, and repeated crashes can permanently lower your limits. The goal is staying functional, not pushing the envelope.

If you have a chronic illness that affects your energy, you’ve probably heard the word “pacing.” Your physiotherapist mentioned it. Someone in an online group swears by it. A pamphlet from the clinic referred to it without quite explaining what it means.

What you probably haven’t had is a clear explanation of what pacing actually is, why it works physiologically, and how to do it in a way that’s realistic for your actual life rather than a hypothetical life with no obligations.

This is that explanation.

Spoon theory first

Christine Miserandino invented Spoon Theory in 2003 to explain chronic illness energy to a friend. The story is that she was in a diner, her friend asked what it’s like to have lupus, and she grabbed all the spoons off nearby tables and handed them over.

Most people, she explained, wake up with unlimited spoons. They don’t count. They move through their day and the spoon supply never runs out in any meaningful way. If something takes more energy, they spend a bit more and keep going.

People with chronic illness wake up with a limited number of spoons. Every task costs spoons, getting dressed, showering, making breakfast, responding to emails, having a conversation. The spoons don’t regenerate fully overnight. On a flare day, you might start with half the usual supply. Spending spoons you don’t have means borrowing from tomorrow, and tomorrow starts short.

Spoon Theory isn’t a medical model. It’s a communication tool. And it’s useful precisely because it makes visible the resource management that chronic illness demands, and that nobody around you can see. You’re not lazy. You’re not choosing to do less. You have a limited energy supply, and you’re making decisions about how to allocate it.

What pacing actually is

Pacing is the practice of managing your activity within your actual energy envelope, rather than pushing past it.

It sounds obvious. It isn’t, because it runs directly against the “push through” logic that most people, including most healthcare providers, apply to fatigue by default.

Pacing has specific clinical application in ME/CFS (myalgic encephalomyelitis/chronic fatigue syndrome), where it is contrasted with graded exercise therapy (GET), an approach that establishes a baseline and then makes fixed incremental increases in activity regardless of how the person responds. In 2021 the UK’s National Institute for Health and Care Excellence rewrote its ME/CFS guideline and told clinicians not to offer graded exercise therapy, generalized exercise programs, or any therapy based on physical activity as a cure. The reasoning is the mechanism: post-exertional malaise means that pushing past capacity produces worsening symptoms, not improvement, so a protocol built on fixed increases is building in harm.

Canada has no equivalent national guideline. The most recent Alberta clinical practice guideline on ME/CFS is dated January 2016 and still presents graded exercise alongside pacing as an option. It predates the evidence review that changed the UK position by five years. If your doctor recommends graded exercise, this is very likely why, and it is worth knowing that the disagreement is about evidence rather than about you.

Pacing, by contrast, involves staying within your actual current capacity and managing your energy distribution deliberately. The goal isn’t to push the envelope, it’s to use what you have in a way that keeps you functional.

The same reasoning now reaches a much larger group. Roughly half of people with long COVID experience post-exertional malaise and meet the diagnostic criteria for ME/CFS, which means the pacing literature, and the warning about graded exercise, applies to them too. If you developed a fatiguing illness after a COVID infection and have been handed a graded exercise plan, this is the conversation to have.

For conditions other than ME/CFS, the concept still applies in modified form. Anyone with fatigue-producing chronic illness benefits from thinking deliberately about energy allocation. The specific rules of pacing for ME/CFS (particularly around avoiding triggering post-exertional malaise) may not apply in the same way to conditions like fibromyalgia or lupus, but the core principle, stay within your actual limits rather than consistently exceeding them, is broadly sound.

How post-exertional malaise works

Post-exertional malaise (PEM) is the medical term for the worsening of symptoms that follows exertion beyond your capacity. It’s a distinctive feature of ME/CFS but appears to some degree in related conditions.

What makes PEM distinctive is its timing. Unlike ordinary fatigue, which you feel during or immediately after exertion, symptoms typically worsen 12 to 48 hours after the activity, and a crash can last days or weeks. You push through a difficult day, feel okay-ish the day after, and then crash hard on day three. This delay makes the connection between cause and effect hard to identify, and it makes the push-through approach feel like it worked until suddenly it didn’t.

The underlying mechanism is not settled. Research points at impaired energy metabolism, autonomic nervous system involvement and immune activation, but nobody can yet hand you a complete account, and any source that claims one is ahead of the evidence.

What is not in dispute is that repeated crashes are not benign. NICE defines a relapse as a sustained worsening that requires substantial adjustment to energy management, and notes plainly that relapses can lead to a long-term reduction in the person’s energy limits. The Workwell Foundation puts it more bluntly: for some people, worsening symptoms become persistent and mark an overall decline in function that is not recoverable. That is the whole argument for pacing. It is not about comfort. It is about not spending capacity you may not get back.

If your doctor has told you to “push through” fatigue with ME/CFS, you now know that this advice is outdated and potentially harmful.

Finding your baseline

The starting point for pacing is establishing your baseline, what you can actually do without triggering a crash.

This is harder to figure out than it sounds, because the post-exertional delay means you might not know you’ve exceeded your limit until two days later. Some approaches:

Heart rate monitoring, and a correction to the usual advice. Heart rate monitoring is one of the few pacing tools that gives you feedback in the moment rather than two days later. The idea is to stay below your ventilatory or anaerobic threshold, the point where your body switches to a less efficient way of producing energy.

An earlier version of this article, along with a great deal of other material online, told readers to estimate that threshold as a percentage of maximum heart rate using the standard age-based formula. That advice was wrong, and wrong in the direction that causes harm. The Workwell Foundation, the group that developed two-day cardiopulmonary exercise testing for ME/CFS, advises against age-based maximum heart rate formulas specifically. More than 85 per cent of people with ME/CFS have a blunted heart rate response to exertion, called chronotropic incompetence, which lowers the real threshold. Applying a formula built for people without that response sets your ceiling too high, and you spend months crashing while believing you are pacing correctly.

What Workwell recommends instead needs no test and no arithmetic about your age. Measure your resting heart rate after waking, before you get out of bed, every day for a week. Average those seven readings. Add 15 beats per minute. That is your starting estimate. Workwell also suggests avoiding more than about two minutes above that number where you can, and resting after an alarm until your heart rate comes back within ten beats of resting. Some people find over time that they can tolerate a higher ceiling, and the advice is still to start conservative and move later. A two-day CPET is the accurate way to find the real number, and it is not widely available in Canada, so the resting-heart-rate estimate is what most people will actually use. Take it to your clinician rather than treating it as a prescription.

Activity logging. Tracking what you did and how you felt over the following two days builds a data picture of your actual tolerance. It’s tedious. It’s also the only way to identify patterns that the delayed onset of PEM obscures.

Starting lower than you think you need to. Most people find that their initial sense of their baseline is too optimistic. Starting with less activity than feels necessary and seeing how you respond gives you a more accurate floor to build from.

Distributing energy across a day

Once you have a rough baseline, pacing involves distributing your available energy across the day in a way that keeps you below the crash threshold.

Some practical frameworks:

Front-load carefully. The temptation is to do the most important things first and rest afterward. The problem is that “afterward” often becomes “not resting enough before the next thing.” Building rest into the schedule before you feel like you need it prevents the depletion cycle.

Rest breaks are part of the activity, not between activities. Brief rest periods during activity (lying down for ten minutes between tasks, not just sitting) can extend overall functional time by allowing partial energy recovery before the next demand.

Boom-bust awareness. The boom-bust pattern is common in chronic illness: high-energy days where you do everything, low-energy crash days where you do almost nothing. Pacing attempts to flatten this curve, doing less on good days, doing slightly more on bad days, and building consistency rather than swinging between extremes.

Cognitive and social energy count. Pacing often focuses on physical activity, but cognitive tasks (reading, screen time, complex conversations, decision-making) and social engagement also cost energy in ways that need to be factored in. Spending your spoon budget on a long phone call is a real budget decision.

What pacing is not

It’s not giving up. Pacing is a strategy for preserving function over time, not a decision to stop living. People who pace effectively often do more over weeks and months than people who push through, because they’re not spending recovery days in a crash.

It is not the same as being sedentary, with two real caveats. Movement within your capacity is part of pacing, not in conflict with it, and deconditioning carries its own costs. For many people gentle movement in short intervals sits comfortably inside the framework.

The caveats matter, though. The CDC’s clinical guidance notes that where orthostatic intolerance is present, being upright is itself the exertion, and tolerance for being upright generally needs to be addressed before any activity plan is worth attempting. And for people with severe or very severe ME/CFS, NICE advises that changes in activity be made smaller and any increases much slower, with support from a physiotherapist or occupational therapist working in a specialist team. If you are largely housebound or bedbound, general pacing advice written for people who can still get to the shops does not transfer, and you are the group most likely to be harmed by advice that assumes it does.

It is not permanent stasis, and it is also not a treatment. Some people do find that capacity expands slowly once the boom-bust cycle is broken. Be careful how much weight you put on that. NICE states directly that energy management is not curative, that activity should never be increased automatically but maintained or adjusted, upward only after a period of stability and downward when symptoms worsen, and that this is a long-term approach that can take weeks, months or years to reach stabilization. Workwell says the same thing in fewer words: pacing is not a treatment for ME/CFS, it is a way of avoiding harm. Improvement happens for some people and not for others, and whether it happens is not a measure of how well you paced.

Talking to your doctor about this

Many physicians, especially those with limited chronic illness experience, default to exercise recommendations for fatigue. It’s worth knowing how to have this conversation.

“I’ve been reading about pacing as an approach to managing my energy with this condition. My understanding is that it involves staying within my actual energy capacity rather than pushing past it. Can we talk about how this fits with your recommendations for me?”

This framing opens a conversation rather than a confrontation. If your physician dismisses pacing entirely without engaging with the reasoning, that’s useful information about whether they’re the right provider for your condition.

Physiotherapists and occupational therapists with chronic illness specialization are often more up-to-date on pacing than general practitioners. If pacing is something you want to learn to apply systematically, a referral to a chronic illness-aware OT or physio is worth pursuing.

The permission you didn’t know you needed

For many people with chronic illness, discovering pacing is the first time someone has given them a framework that validates what their body has been telling them: you can’t do everything, there are real limits, and respecting those limits is the intelligent response, not the weak one.

You’re not lazy. You’re not giving up. You’re managing a finite resource.

Pacing is not resignation. It is how you live the fullest version of your actual life instead of repeatedly borrowing from a future you are making harder.

Sources

National Institute for Health and Care Excellence, Myalgic encephalomyelitis (or encephalopathy)/chronic fatigue syndrome: diagnosis and management, NG206 (energy management is not curative; do not offer graded exercise therapy; care for people with severe or very severe ME/CFS). US Centers for Disease Control and Prevention, Strategies to Prevent Worsening of Symptoms (post-exertional malaise timing; orthostatic intolerance; exercise is not a cure). Workwell Foundation, Pacing with a heart rate monitor to minimize post-exertional malaise in ME/CFS and long COVID (resting heart rate plus 15; chronotropic incompetence; the case against age-based formulas). Toward Optimized Practice / Alberta Medical Association, Identification and Symptom Management of Myalgic Encephalomyelitis/Chronic Fatigue Syndrome, January 2016.

This is general information, not medical advice. It cannot account for your diagnosis, your other conditions, or your medications, and the heart rate figures here are a starting point for a conversation with a clinician rather than a prescription.

Living Unlimited Team

Frequently asked questions

What is pacing?

Pacing is the practice of managing your activity within your actual energy envelope rather than pushing past it. It runs directly against the push-through logic most people apply to fatigue by default. The goal is not to push the envelope; it is to use what you have in a way that keeps you functional.

What is post-exertional malaise?

Post-exertional malaise (PEM) is the worsening of symptoms that follows exertion beyond your capacity, a distinctive feature of ME/CFS. Unlike ordinary fatigue, symptoms typically worsen 12 to 48 hours after the activity, and a crash can last days or weeks. Repeated crashes are not benign and can lead to a long-term reduction in energy limits.

Is graded exercise therapy still recommended for ME/CFS?

In 2021 the UK’s National Institute for Health and Care Excellence rewrote its ME/CFS guideline and told clinicians not to offer graded exercise therapy. Canada has no equivalent national guideline, and the most recent Alberta guideline dates from 2016 and predates that evidence review, which is likely why some doctors still recommend graded exercise. It is a conversation worth having with your own provider.

How do I find my heart rate ceiling for pacing?

The Workwell Foundation advises against age-based maximum heart rate formulas, because more than 85 per cent of people with ME/CFS have a blunted heart rate response that sets the real threshold lower. Instead, measure your resting heart rate on waking every day for a week, average the readings, and add 15 beats per minute. Take that estimate to your clinician rather than treating it as a prescription.

Does pacing apply to long COVID?

Roughly half of people with long COVID experience post-exertional malaise and meet the diagnostic criteria for ME/CFS, which means the pacing literature, and the warning about graded exercise, applies to them too. If you developed a fatiguing illness after a COVID infection and have been handed a graded exercise plan, that is a conversation to have with your provider.