150 minutes: what the guidelines askStrong evidence
Adults should aim for at least 150 minutes of moderate activity a week, such as brisk walking, or 75 minutes of vigorous activity, plus strength work for all the major muscles on at least 2 days. The NHS suggests spreading it over 4 or 5 days, or every day, and NHS Better Health puts it as about 20 to 30 minutes a day. Walks of any length count.
If 150 feels far off, start anyway: the UK guidelines say any activity is better than none and more is better still, and that even one or two sessions a week bring benefits. This plan reaches about 150 minutes of brisk walking in weeks 7 and 8.
Sources 3, 8, 2, 17
How brisk is brisk, in numbersEmerging evidence
The NHS puts a brisk walk at about 3 mph (4.8 km/h), faster than a stroll. In lab studies, about 100 steps a minute was moderate effort for most adults aged 21 to 85: count your steps for 15 seconds and multiply by 4.
Both numbers are averages that don't allow for fitness, and people vary a lot: a fit person may need to walk faster or uphill to reach moderate effort, and a less fit person may get there more slowly. So the talk test leads, and the numbers are a check.
Sources 1, 18, 19, 20
Why this order, and how fast to buildEmerging evidence
In the WalkBack trial, 701 adults who had recently recovered from low back pain followed a walking and education programme that built up days first, then minutes, then faster walking, hills or stairs. It nearly doubled the time until their back pain came back (a median of 208 days against 112), though the walkers reported more problems in their legs and feet (100 against 54). This plan uses the same order.
How fast to build is less certain: a review of 37 walking trials couldn't pin down the best number of days, minutes or pace, and we found no trial comparing ways of building up. Our 5 minutes a week is an editorial choice; NIH's slower programme, reaching 30-minute brisk walks in weeks 11 and 12, is a fine alternative.
Sources 21, 7, 22, 6
Intervals: what the trials foundEmerging evidence
Interval walking alternates 3 minutes fast with 3 minutes easy, five times over. The trials set the fast pace at about 70% of each person's peak aerobic capacity, measured in a lab, and the easy pace at about 40%. Breathing hard and able to say only a few words is our everyday translation of the fast pace.
In a 5-month trial in 246 adults averaging 63, interval walking on 4 or more days a week raised thigh strength by 13 to 17% and fitness by 8 to 9%, more than steady walking did, and lowered blood pressure more. In a small trial in 32 people with type 2 diabetes, it improved fitness, body fat and blood sugar more than steady walking that used the same energy. In 679 people, fitness rose with up to about 50 minutes of fast walking a week, then levelled off.
Most of the research is in older adults in Japan, and keeping it up is the hard part: over 22 months, people managed about 70% of their target training days on average. So the plan starts with 3 rounds once a week.
Sources 23, 24, 25, 26, 27
Hills: more work without more speedEmerging evidence
A slope makes walking harder without walking faster: in a lab study of 16 fit adults, it took about half as much energy again at a 5% slope and roughly double at 10%. Your hips and calves do most of the extra work.
In small lab studies of healthy adults and adults with obesity, walking slowly up a gentle slope loaded the knee less than walking briskly on the flat at a similar effort. But your knees bend more with each step as the slope steepens, and the thigh muscles work harder at the same speed, so if you have pain around your kneecap you may not find hills easier: keep them gentle, and see our runner's knee guide. Walking downhill loads the knee much more than the flat, so take descents slowly.
Sources 28, 29, 30, 31, 32, 33
What walking programmes doStrong evidence
In 32 trials in inactive adults, walking programmes of 4 weeks or more raised fitness, lowered blood pressure by about 3.6/1.5 mmHg, and took about 1.5 cm off the waist and 1.4 kg off weight, though they didn't change cholesterol or other blood fats. In 42 studies of walking groups, people added about 80 metres to their 6-minute walk and their depression scores fell, with no notable harms.
As your fitness improves, the same pace usually feels easier, so the talk test will speed you up (our reading).
Sources 34, 35
Walking and weight: the honest numbersStrong evidence
Walking programmes without a diet took off about 1.3 kg over a median of 16 weeks, about 0.05 kg a week, and longer programmes took off more. Across 116 trials of aerobic exercise in adults with overweight or obesity, 150 minutes a week took off about 2.8 kg and 300 minutes about 4.2 kg, mostly in supervised trials, and European obesity guidance says to expect no more than 2 to 3 kg on average from exercise alone.
Exercise falls short of the calorie sums mainly because the doses are small and people eat a little more. Your waist and fitness usually improve more than the scales: to lose more weight, eat less as well, and see the weight loss plan.
Sources 36, 37, 38, 39
Two strength daysStrong evidence
Health guidelines ask for strength work for all the major muscles on at least 2 days a week, and the UK Chief Medical Officers now say it should count as much as the 150 minutes. Walking counts toward the 150 minutes but not toward the strength days.
The two 20-minute sessions here meet the guideline with a chair, a wall and a band, or no equipment at all. The UK guidelines report health benefits from over 30 minutes of strength work a week, and these give about 40.
Sources 3, 8, 2
Steps: a check, not the goalEmerging evidence
A brisk 30-minute walk is about 3,000 steps, and with your everyday steps, meeting the guideline usually comes to about 7,000 to 8,000 a day. In large studies, 7,000 steps a day went with a 47% lower risk of death than 2,000, and over 60 the benefit levelled off at about 6,000 to 8,000 a day. These are links, not proof.
Track your steps if you like, but minutes are the target. Our guide to how many steps a day explains the numbers.
Sources 40, 41, 42, 43
Walking, running and the treadmillEmerging evidence
Running burns energy faster: in lab studies, running 1,600 metres took about 1.3 to 1.4 times the energy of walking it, and walking cost about the same on a track as on a treadmill. But in a large cohort, walkers and runners who used the same energy had similar falls in the risk of high blood pressure, high cholesterol and diabetes, and each walking step lands with about half the force of fast running.
On a treadmill, let go of the rails: gripping them cut oxygen use by 15 to 21% at the same setting in a small study, so the walk got easier than the display suggested. A light touch for balance is fine, and use the safety clip.
Sources 44, 45, 46, 47, 48
Start elsewhere if this applies
Most people can start walking without a check: WHO says medical clearance is generally unnecessary before activity no harder than brisk walking, for people without a medical reason to avoid it. Check first, or start somewhere else, if this applies to you:
- Chest pain, dizziness or fainting when you're active, or a heart condition, diabetes, kidney disease or asthma: speak to your GP before you start, and especially before the fast intervals and hills.
- You fall or feel unsteady: build strength and balance first with the seniors plan. The UK consensus warns that brisk walking may raise the risk of falls and fractures in people already at risk.
- Your legs ache when you walk and ease when you stop: see a GP. It can be narrowed leg arteries, and once that's diagnosed, the claudication walking workout is the programme for it.
- ME/CFS: NICE advises against exercise programmes with fixed step-by-step increases, like this one. Our ME/CFS guide explains pacing.
- Pregnant: walking is recommended. Don't start new vigorous exercise, so keep the fast intervals and the hills at a talk-but-not-sing pace unless you already did them.
Sources 3, 49, 6, 50, 15, 51, 52
Making it fit your life
Our suggestions for common situations:
- Three days a week: walk on Monday, Wednesday and Saturday for about 50 minutes each (Wednesday as the interval walk plus a brisk 15 minutes), and do the strength sessions after two of the walks. The UK guidelines say the weekly minutes can come in one or two sessions and still help.
- Short on time: split any walk into 10-minute bouts. Bouts of any length count.
- No equipment: do strength A on both strength days. Strength B needs only a chair, a wall and a resistance band.
- No hills or treadmill: climb stairs instead, 2 to 4 climbs of a flight or two, walking down slowly with the rail. The NHS counts walking up stairs as vigorous.
- Bad weather: a treadmill, or the low-impact cardio workout at home.
- Sore knees or hips: flatter routes and shorter, more frequent walks; cycling counts toward the 150 minutes too. See our knee and hip arthritis guides.
- Back pain: keep walking. In the WalkBack trial, building up walking helped keep low back pain from coming back.
- Over 65: while you build up, the UK guidelines suggest walking and resting for a minute when you need to. WHO also asks over-65s for balance and strength work on 3 or more days a week, so add the balance routine on 2 or 3 days.
- Pregnant: the NHS suggests starting with about 10 minutes a day if you're new to exercise, and not starting new vigorous activity. Keep the fast minutes and the hills at a talk-but-not-sing pace unless you already did them.
- Diabetes treated with insulin or a sulfonylurea: ask your diabetes team how to plan for longer walks, and see our type 2 diabetes guide.
- A heart condition: ask about cardiac rehabilitation first, and see our heart disease guide.
Sources 8, 2, 21, 3, 52