Reviewed, edited and approved by Editor-in-chief Daniel Sköld · Updated 23 October 2026
Contents
The NHS Couch to 5K app has a reassuring name. Unfortunately, it also contains the words ‘5K’, which can sound like a threat if your current cardio consists of hurrying for a train.
Here’s the useful bit: you don’t have to become a runner. If you’re in midlife and have been largely inactive, the first job is to find a manageable way to move more often. The app is one option, not an entrance exam.
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How do you start cardio when you’re unfit?
Start below the level that makes you dread doing it again. If a brisk walk feels daunting, take an easy walk first. Try going round the block after lunch or walking to the shops instead of driving. Repeat it until it feels ordinary, then go a little farther or add a short stretch at a quicker pace.
There is no minimum speed at which a walk becomes worth leaving the house for. Moving more is a start; walking briskly is one way to build cardiovascular fitness. The NHS suggests increasing your walking distance gradually if you have not been very active.
When you’re ready to pick up the pace, try a brisk ten-minute walk. The NHS Active 10 app can show you how much you walk and whether you’re walking briskly enough. But an app is optional. A familiar route, comfortable shoes and a note on your calendar will do the job without asking for your location every five minutes.
Make the outing easy to begin. Leave your shoes by the door. Choose a flat route with a straightforward way home. Go at a time you can repeat, rather than waiting for an imaginary free afternoon. The point of the first few outings is not to prove you’re fit; it’s to make the next outing less of a negotiation.
Is NHS Couch to 5K right for beginners?
Yes, if running appeals to you and you’re ready for short jogging intervals. The free NHS Couch to 5K app is designed for beginners. In its first week, it alternates one-minute runs with walks of one minute and 30 seconds. A coach talks you through the changes, so you don’t have to watch a stopwatch like a nervous invigilator.
The programme schedules three runs a week, with rest days between them. It builds towards running continuously for 30 minutes. Nine weeks is the suggested timetable, not a deadline: the NHS says you can take longer. If a week feels like too much, repeat it. Going slowly enough to return is more useful than finishing quickly and spending the next fortnight avoiding your trainers.
You can choose a local route or use a treadmill. Wear shoes that support your feet and clothes you can move in; you do not need an elaborate new wardrobe. If you run outdoors with headphones, stay aware of traffic and other people, and choose somewhere you can see and be seen when it’s dark.
And if running hurts your joints or simply makes you miserable? Don’t mistake the app’s popularity for a medical requirement. Brisk walking, cycling, dancing and water aerobics can all count as moderate activity. If joint problems make walking difficult, the NHS suggests checking whether your local pool offers exercise classes.
How hard should cardio feel?
For moderate activity, use the talk test. You should be breathing faster and feeling warmer, but still able to speak; singing would be harder. A comfortable stroll is a perfectly reasonable starting point, even if you need to walk more briskly later to reach moderate intensity.
The general NHS target for adults aged 19 to 64 is at least 150 minutes of moderate activity a week, or 75 minutes of vigorous activity, alongside muscle-strengthening activities on two days. It also advises breaking up long periods of sitting. Those are targets to build towards, not the admission price for your first walk.
The best first session is one you can imagine doing again.
Running usually takes more effort than brisk walking, so don’t chase a pace or compare yourself with someone who has been training for years. Ease up if you are pushing too hard to talk comfortably. You’re trying to build a habit and some fitness, not win an argument with your lungs.
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What if motivation disappears after a week?
Assume it will. Motivation is unreliable; a simple plan is less so. Pick the next three times you could realistically get out, put them in your calendar and decide exactly what you’ll do. ‘Walk after Tuesday’s lunch’ is easier to act on than ‘sort my fitness out’.
Keep a fallback version for busy or grim-weather days: a shorter walk, a few extra minutes on your usual journey, or some movement at home. If you miss a session, take the next available chance rather than declaring the whole enterprise ruined. A missed Tuesday does not require a dramatic Monday relaunch.
Track something that matters to you. It might be the number of walks you took, how long you were out, or whether the hill near your home feels less unpleasant. A phone app can help, but a tick on a scrap of paper works too. If you enjoy company, arrange a regular walk with a friend; if you prefer quiet, take that instead.
Cardio is only part of the picture. As your routine settles, add some strengthening activity on two days a week. Carrying heavy shopping, using resistance bands or doing suitable bodyweight exercises are among the NHS examples. You needn’t do everything at once. Trying to overhaul your entire life by Thursday is a fine way to be back on the sofa by Sunday.
When should you check with a GP first?
If you have not exercised for some time, have a medical condition, or are concerned about your health, NHS guidance says to speak to your GP before starting an exercise plan and check that its intensity suits you. That is particularly sensible before moving from gentle walking to running. If you have a heart condition or are recovering from a heart event, ask your GP or cardiac rehabilitation team what activity is appropriate for you.
Stop exercising if you develop pain or feel unwell. Chest tightness, dizziness, palpitations or unusual breathlessness deserve medical advice, not another lap. Call 999 for chest pain or serious difficulty breathing; use NHS 111 for urgent advice when it is not an emergency.
In England, eligible adults aged 40 to 74 can be offered a free NHS Health Check every five years. It looks at cardiovascular risk, including blood pressure and cholesterol, and gives you a chance to discuss activity. It is an England programme, not a prerequisite for going for a walk. In Scotland, Wales or Northern Ireland, ask your GP practice about an individual health assessment if you have concerns; do not assume the England programme is available where you live.
In short
Start with a walk you can comfortably repeat, then gradually add time or pace. If you want to try running, the free NHS Couch to 5K app builds it up with walking breaks and rest days; you can take longer than nine weeks. You do not have to run to improve your fitness, and if you have health concerns or have been inactive for a long time, check with your GP before stepping up the intensity.
Adrian Irving writes about health for men 45 and over who would rather do something than worry. Training, weight loss, sleep, cholesterol and blood tests, heart health, testosterone, the prostate, mental health and your sex life – what the evidence says, what's worth trying, and when it's time to see your GP.
One of Midcent's writers. Spotted something? Write to adrian@midcent.uk.
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