In practical everyday terms, pacing is the habit of shaping activity around how much feels manageable now rather than how much a plan said should happen. It shows up in small, ordinary decisions: showering now or later, answering the phone or letting it go to voicemail, doing half the washing-up and leaving the rest. None of these look like a strategy from the outside — which is partly why pacing is so often mistaken for doing nothing.

It is closer to the opposite of doing nothing. Pacing involves constant, quiet decision-making: weighing what matters most today, estimating what different tasks will cost, choosing between them, and revising all of it when the day turns out different from expected. Someone pacing is not avoiding life — they are continuously re-fitting life to a body that changes shape.

Because demand in ME/CFS is broader than physical movement, pacing covers more than rest between tasks. Screen use, admin, appointments, family time, social contact, preparing food and difficult conversations can all draw on the same limited pool, so a paced day might protect time around an appointment, cap screen time before a demanding evening, or choose a message over a call. The Energy & Capacity and Types of Exertion pages in this collection cover those forms of demand in depth.

This also means pacing is not a fixed amount of physical rest. Someone can rest all morning and still be over the day's limit by the afternoon after a long phone call and a difficult letter — and someone else can have a full, warm day that stays manageable because its demands were chosen and spread.

Pacing leaves a lot of freedom in how it is done. Some of the forms adapting can take:

• Doing a smaller version — a shorter shower, ten minutes of housework rather than the full job, a brief call instead of an hour
• Stopping before a task is fully finished — treating 'half done' as a complete, legitimate outcome
• Choosing what matters most today, and letting something else move down the list
• Leaving non-essential tasks entirely, without treating that as neglect
• Alternating types of demand, so thinking, standing and talking are not stacked back-to-back
• Asking for help with parts of a task someone else can do, keeping the parts that matter to you
• Planning recovery time around unavoidable demands — a quiet afternoon after a morning appointment, for example, without any promise of how it will feel
• Making room for meaningful activity on purpose — the hobby, the visit, the thing that makes the week worth living — rather than spending everything on essentials

That last point matters more than it might sound. Pacing that only rations the necessary leaves people with a well-rested, joyless week. Deciding that something personally meaningful is worth its cost is also pacing — and often the part that makes the rest of it sustainable to live with.

It is worth saying plainly: symptoms and PEM are not always predictable, and no way of organising activity changes that. Demand can have delayed effects, similar days can go differently, and payback can arrive after a day that looked well within limits. For many people, pacing reduces unnecessary demand and makes decisions easier — but it does not promise stability, and a carefully paced week can still end with a flare.

Two mistakes are worth avoiding on either side of this. The first is treating a better day as proof that capacity has permanently increased — and spending the following week as though it had. The second is treating a worse day as evidence of failure. Neither reading matches how ME/CFS behaves. A good day is a good day, a hard day is a hard day, and both can arrive without anyone having got the decisions wrong.

Pacing should not be confused with programmes that require planned increases in activity regardless of symptoms or PEM. Pacing does not involve exercise targets, step counts or fixed activity increases, and it does not ask anyone to push through symptoms or earn their rest.

It is also not a moral system. There will be weeks when pacing is impossible — a hospital admission, a house move, a family crisis, life — and payback that arrives anyway. A crash after an unavoidable demand is not evidence of failed pacing, and it deserves the same response as any other crash: recovery, not a tribunal.

Pacing is often imagined in terms of walks and housework, but at severe and very severe levels of ME/CFS the same approach applies to far smaller amounts — and it is no less real for being small. It may mean:

• Very small amounts of movement or repositioning, spaced through the day
• Choosing between a short communication and a few minutes of personal care, rather than between errands
• Limiting sensory input — dimming, quiet, shorter or fewer visits — as a central part of managing demand
• Doing a smaller version of communication: a few written words instead of a conversation, a hand squeeze instead of words
• Pacing caregiving itself — deciding when a wash happens, what can be skipped today, what can be made easier

For someone who is bedbound, pacing is not a lesser version of the same idea — it is the same idea, applied to the real demands that exist. Limited speech does not mean limited understanding; many very severe patients are doing this arithmetic constantly, just more quietly than everyone else.

• Energy & Capacity — what capacity means, and why it covers more than physical activity
• Types of Exertion — the different forms of demand, and how they stack
• Baseline & Usual Capacity — a rough sense of ordinary without tracking yourself into exhaustion
• Rest and Rest Rituals — rest that actually rests, and low-demand ways to spend it
• Low-Energy Days and Crash & Flare Support — what to do when the day or week has already gone wrong

Reading all of it is not required. Many people start with whichever page answers the problem this week, and return to others when they become relevant.