Brisk Walking
Pace that raises breathing but still allows talking.
Get-fit guides / Best exercise for weight loss
Best exercise for weight loss
By the Exercise Explorer team. Last updated 13 November 2026.
Exercise helps with weight loss, though on its own the effect is modest, and weight also depends on eating, sleep and much else. A pooled analysis of 16 trials found moderate reductions in weight and a larger reduction in visceral fat. These are the options we rate well, and what to expect.
Read this first. This is general information, not medical advice. If you have a health condition, take medicines, or want to lose a lot of weight, speak to your GP or a registered dietitian. We did not review diet research for this page.
The short answer
- A 2021 pooled analysis of 16 trials in people with overweight or obesity found that exercise reduced weight (effect size -0.58), BMI (-0.50) and visceral fat (-1.08). The average programme was moderate to vigorous activity, 4 times a week, 50 minutes a session, for 22 weeks.
- Exercise did not significantly increase lean body mass in that analysis.
- The best exercise is the one you will keep doing. Consistency over months matters more than the type.
- Exercise improves health even when the scales barely move.
The best exercises when you want to lose weight
Daily Walking
Steady walks built into the day; the easiest place to start.
Lap Swimming
Pool lengths using one or more strokes.
Aqua Aerobics
Group exercise to music in a pool.
Resistance Band Training
Full-body workouts with elastic bands.
HIIT
Short maximal efforts alternated with rest.
Stationary Bike
Seated cycling at the gym or at home.
Elliptical Cross-Trainer
Gliding low-impact cardio.
How each one helps
Evidence at a glance How much good research supports each option
StrongModerateLimited
- 1Brisk WalkingStrong evidence
Easy to do often and for long. Moderate walking can fit the trial programmes.
30 min × 5/wkEffort ●●○○○Free - 2Daily WalkingStrong evidence
Build up steadily. A step counter helps you track it.
30 min × 5/wkEffort ●○○○○Free - 3
- 4Aqua AerobicsModerate evidence
Kind on joints. A 2026 analysis found small pain and function gains in people with overweight and knee or hip osteoarthritis.
45 min × 2/wkEffort ●●○○○Low cost - 5Resistance Band TrainingModerate evidence
Strength work helps keep muscle. Our reviewed analysis did not show it increased lean mass.
30 min × 3/wkEffort ●●○○○Low cost - 6HIITModerate evidence
Short intense intervals. Demanding, so build up and check with your GP if you have health concerns.
25 min × 3/wkEffort ●●●●●Free - 7Stationary BikeLimited evidence
Low impact. Good if joints are sore.
30 min × 3/wkEffort ●●○○○Low cost - 8Elliptical Cross-TrainerLimited evidence
Low-impact gym cardio. We found no trials we had read in full.
30 min × 3/wkEffort ●●○○○Moderate cost
What to watch out for
- Expecting exercise alone to produce rapid weight loss. Effects on weight are moderate.
- Crash diets combined with hard exercise.
- Doing too much too soon, which raises injury risk and makes people quit.
- Relying on "fat-burning" gimmicks. We found no trials we had read in full for most of them.
- Judging progress only by the scales. Fitness, waist, energy and mood matter too.
A week of exercise for weight loss
This is an example to adapt, not a prescription. If a day feels too much, do less.
- Day1A 20-minute brisk walk.
- Day215 minutes of light strength work.
- Day3A 20 to 30-minute bike ride or swim.
- Day4Rest or gentle stretching.
- Day5A 20 to 30-minute brisk walk.
- Day6A longer walk, or a class you enjoy.
- Day7Rest. Add a few minutes each week as it feels manageable.
- My notes: what did you do, and how did you feel?
When to see a doctor
Stop exercising and get medical advice if any of these apply to you.
Get urgent help now
- Chest pain or tightness
- Severe breathlessness, or fainting
Call 999 or go to A&E. Do not wait for a GP appointment.
Speak to a GP or call NHS 111 if you have
- Dizziness or palpitations during exercise.
- Joint pain that is sharp or getting worse.
- Unintentional weight loss or gain, or you want to lose a lot of weight.
- Concerns about your relationship with food or exercise.
What the research says
A 2021 systematic review and meta-analysis of 16 randomised trials found that exercise interventions in overweight and obese people reduced weight (effect size d = -0.58), BMI (d = -0.50) and accumulated visceral fat (d = -1.08), but did not significantly increase lean body mass. The average intervention was of moderate to vigorous intensity, 4 times a week, 50 minutes per session, over 22 weeks. The authors called for more research on different modalities and intensities.
The WHO 2020 guidelines recommend 150 to 300 minutes of moderate activity a week plus strength work on two days for general health, and note that more activity gives more benefit.
A 2026 pooled analysis of 12 trials (1,057 people with overweight or obesity and knee or hip osteoarthritis) found small improvements in pain and function with aquatic exercise (low certainty).
We did not review diet research, and effect sizes are not the same as kilograms lost, so individual results vary widely.
Full references are listed under Sources below. Evidence ratings are our own plain-English summary of the research we found, not a medical opinion.
Frequently asked questions
What is the best exercise for weight loss?
Trials mostly pool moderate to vigorous aerobic exercise, done about four times a week for 50 minutes. We did not find reliable evidence that one type beats another, so choose what you can keep doing.
Can I lose weight by exercise alone?
Exercise reduced weight with a moderate effect size in a 2021 analysis of 16 trials, but weight also depends on eating and other factors. Exercise brings health benefits even when weight changes little.
Is walking good for weight loss?
Brisk walking uses energy, is easy to keep up and is low impact. It can be a good base, alongside strength work.
Is HIIT better for weight loss?
We did not find reliable evidence in this review that it beats steady exercise for weight loss. It is time-efficient but demanding.
Does strength training help weight loss?
It helps with muscle and strength, but in the 2021 analysis exercise did not significantly increase lean mass. It still has other health benefits.
How long until I see results?
The trials averaged 22 weeks. Fitness often improves sooner than the scales.
When should I see a doctor?
See a GP for dizziness, palpitations or joint pain during exercise, unintended weight changes, or if you want to lose a large amount of weight.
Sources
- Effects of Exercise Interventions on Weight, Body Mass Index, Lean Body Mass and Accumulated Visceral Fat in Overweight and Obese Individuals: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. International Journal of Environmental Research and Public Health, 2021. doi.org/10.3390/ijerph18052635
- World Health Organization 2020 guidelines on physical activity and sedentary behaviour. British Journal of Sports Medicine, 2020. doi.org/10.1136/bjsports-2020-102955
- Effects of aquatic exercise on pain and physical function in overweight/obese patients with lower limb osteoarthritis: a systematic review and meta-analysis. Frontiers in Physiology, 2026. doi.org/10.3389/fphys.2026.1864401