You do not need to buy anything to start, and the month in which you were most likely to buy something is the month in which it was least likely to help. That is not frugality advice. Shopping is the most convincing substitute for going, because it produces a delivery date, a small thrill, and the distinct feeling of having begun.

So here is the whole first month built from what is already in the flat.

What you already own that is enough

Shoes that fit and do not hurt. Any shoes. Trainers if you have them, but a pair of flat, comfortable shoes you already walk in is fine for walking. If they hurt after ten minutes, that is information; if they do not, they are not the constraint.

Something you can move in. Not kit. The clothes you would wear to go to a shop. The single strongest predictor of whether an evening session happens is whether it requires changing clothes, and the answer for the first month should be no.

Two square metres of floor. Enough to lie down with your arms out. This is all the space any of the indoor options below need, and it is why “I have no room” is almost never true — it is usually one chair that has to move.

A staircase, if you have one. Yours, or the building’s. A flight of stairs is the most useful piece of unbought equipment most people have and it is completely ignored because it is not for sale.

A timer. The phone. Sessions here are measured in minutes, never in distance or repetitions, because minutes cannot be got wrong and cannot be compared to anyone.

That is the inventory. Nothing on it costs anything and nothing on it arrives on Thursday.

The month, written out

Four sessions a week, none longer than twenty-five minutes, all built from the list above. The sessions get slightly longer; nothing else changes. The slot in your week does not move at any point in this month, and that constancy is doing more work than the progression is.

WeekSessionsLengthWhat changes
1312, 12, 15 minNothing. You are proving the door opens
2315, 15, 20 minSame route, same slot, five more minutes
3415, 20, 15, 20 minA fourth session, the shortest one added first
4420, 20, 20, 25 minOne session becomes the long one

Total for the month: about five and a half hours. That is a real figure and it is also not a large one, which is the point — the plan is sized to survive a bad fortnight rather than to impress you in a good one.

If a week goes wrong, repeat it rather than skipping ahead. Repeating week two is a completely normal thing to do and is not falling behind, because there is nothing to fall behind.

What goes inside a session

Pick one per session. Do not combine them.

Out and back. Half the minutes in one direction, turn round. No route planning, no navigation, no possibility of ending up further from home than you meant.

A known loop. The block, the way to the shop and back the long way, the near end of a park. Better than out-and-back once you are bored of out-and-back, which happens around week three.

Stairs. For the evenings when the weather has genuinely won. Up and down your own stairs at a pace where you could still hold a conversation, for the session length. It is monotonous and it works and it requires you to own nothing.

Floor space, on the two square metres. Standing up and lying down repeatedly, moving your arms and legs through their range, walking on the spot — the honest name for this is moving about deliberately for fifteen minutes, and that is what it is. It counts by the breathing test in what counts when you're starting from zero.

I am not going to give you a set of exercises with repetitions attached, because I am not qualified to program anyone’s training and a post that pretends otherwise is where this subject usually goes wrong. When you want structured strength work — and the WHO’s 2020 guidelines do recommend muscle-strengthening activity on two or more days a week alongside the aerobic minutes — that is the point to get it from a coach, a physiotherapist, or a properly made programme, not from a blog about leaving the house.

The free structured option, if you want one

If you want something with a name and a schedule rather than a set of minutes, the NHS runs Couch to 5K — a free nine-week programme with a free app, built for people starting from a standing start. It is genuinely free, it is not selling anything, and it needs no equipment beyond shoes.

Two honest notes about it. It is a running programme, and running is a harder first month than walking for most people coming off a long sedentary stretch; and it is somebody else’s programme, so use theirs as published rather than a version reconstructed from an article. It is worth knowing about and it is not the only respectable answer.

The two things worth buying, and when

Not now. At the end of the month, if you are still going out, in this order:

Shoes, if yours hurt. The test is whether your existing pair causes you pain after twenty-five minutes. If it does, that is a real constraint and worth spending on. If it does not, you do not need new shoes and the recommendation you will be given in a shop is not evidence that you do.

A waterproof jacket, before the clocks change. This is the one purchase that reliably buys sessions rather than replacing them, because most of the evenings you are going to lose between October and February are lost to rain rather than to anything about you.

That is the list. Not a watch — a number that goes down in a bad week is a reason to stop, and you do not need one yet. Not a mat, until you are doing floor work often enough to resent the carpet. Not clothing, until the clothes you own have actually failed at something.

Why this order, rather than the usual one

The usual order is: decide, buy, begin. It fails because the purchase happens at the moment of maximum optimism, and by the time the kit arrives you are three days past the feeling that prompted it.

The order here is: begin, find out what actually breaks, buy the one thing that broke. It is slower, it is duller, and it produces a much better first month — one where every pound you eventually spend is answering a question you have already asked in the rain.

Walk first makes the same argument about memberships. The week-one plan is the first line of the table above, written out session by session, with the five things that will stop you and what to do about each.