# Sustainable approaches to weight > Lasting weight change comes from gradual, permanent changes to eating and activity, not crash diets. Activity helps most with keeping weight off and with health at any weight. Start small, set a modest first goal, and build up over months. - Type: Guide - Topic: Nutrition › Weight & Metabolic Health - Reviewed by: Andrew Schox, BSc(Hons) PGradDipPod MPod, Podiatrist (2026-10-21) - URL: https://twikka.com/learn/sustainable-approaches-to-weight - Updated: 2026-10-21 - **Pair activity with eating changes.** Diet plus activity tends to give more benefit than diet alone and helps you keep more muscle [1]. - **Go gradual.** Slow, permanent changes to eating, drinking and activity are the key to managing weight [2]. - **Start with a modest goal.** Guidelines suggest losing 5–10% of your starting weight over about 6 months as a first goal [3]. - **Activity helps at any weight.** Health benefits can come whether or not the number on the scale changes [4]. ## How do you combine diet and exercise for lasting weight loss? Use activity as a partner to your eating changes, not a way to eat as you like. Diet combined with activity tends to give more benefit than diet alone, and it helps you keep more muscle [1]. Exercise on its own, with eating unrestricted, was not effective for weight loss, because people tended to eat more to make up for it [5]. Adding exercise to an eating plan may do little extra for early weight loss, but it may matter more for keeping weight off [6]. For the activity side, European guidelines recommend at least 150 minutes a week of moderate aerobic exercise, such as brisk walking, plus resistance (strengthening) exercise to build muscle [7]. Aerobic activity is best for reducing fat, and a programme that includes strengthening is needed to build muscle [7]. You don't have to start there. Begin with the amount you can manage now and build up gradually; the weekly totals are targets to work towards over time. Brisk walking is a good place to begin, and strengthening can be added later. > **Try this:** This week, choose one short brisk walk you can fit in on most days, and one small, steady change to what you eat. Keep both going before you add anything else. ## What helps you keep a healthy weight long term? Keeping weight off rests mostly on gradual, permanent changes to what you eat, what you drink and how active you are, rather than short-term dieting [2]. Activity matters here. Guidance on how much varies: more than 150 minutes, preferably 300 minutes, a week of at least moderate aerobic activity to prevent regain [4]; more than 250 minutes a week of moderate activity [1]; or 150 to 300 minutes or more [3]. Treat these as a direction and build towards them over time. Maintaining or increasing activity after weight comes off is likely the most promising way to resist regain [5]. A few habits help: - **Set a specific goal and keep track of it.** For adults aged 40 and over with overweight or obesity, this helped people both start and keep up change [8]. Tracking works best when you do it regularly, such as weekly [9]. - **Check your weight about once a week** [3]. - **Look for support that respects your choices.** A person-centred style of help was linked with keeping up activity and healthy eating for a year or more [8]. - **Use a tool that suits you.** A step counter, an activity app or a notebook can all work. - **Be realistic and kind to yourself.** Regaining weight is common [10], and habits take time to change. ## How do you set realistic weight goals? A realistic first goal is modest: guidelines suggest losing 5–10% of your starting weight over about 6 months [3], and even that much can bring clear health benefits [7]. Aim for a steady pace rather than losing weight suddenly with diets [11], and give your goal months rather than weeks. Staying at your current weight has benefits too [2]. Goals can go beyond the scale. European guidelines say weight goals should be realistic, individualised and aimed at the long term, and that waist measurement and body composition deserve attention too [7]. An activity goal counts as well: the NHS suggests getting active for 150 minutes a week [11]. Set specific goals for the near future, such as this week, and check your progress regularly [12]. If you want help finding a pace that suits you, a doctor or other health professional can help. ## What does energy balance mean for weight? Energy balance means the calories your body uses compared with the calories you eat and drink. To stay at about the same weight, the two should match; if you take in more than you use, the extra is stored as fat [13]. To lose weight, you need to use more than you take in [1]. The NHS says you can do this by eating and drinking fewer calories and being more active [14]. Needs vary with your age, weight, height and how much exercise you do [13]. On average, women use around 2,000 calories a day and men around 2,500, so treat figures as a rough guide, not a target to hit exactly [14]. Movement is one side of the balance: the more energy an activity takes, the more calories it uses, and fast walking uses more than walking at a moderate pace [13]. Eating less than you use is how weight comes off, but it isn't realistic to keep a calorie deficit going for ever, so keeping weight off is a different job from losing it [15]. Small, steady changes to both eating and activity feed into the balance. ## Why don't crash diets and quick fixes work? Quick fixes tend not to last because regaining weight is common after dieting: at least one-third of dieters regain more weight than they lost [10]. Bigger daily calorie cuts also mean a larger share of what you lose is lean tissue, so slower loss is better for keeping muscle [10]. Repeated loss and regain may be linked to a higher risk of high blood pressure, abnormal blood fats and gallbladder disease, and has been associated with distress and depression [7]. What tends to last is a plan with realistic goals, regular check-ins and kindness towards yourself, because changing habits and losing weight is not easy and takes time [14]. Keep activity going after weight comes off: adding it to a diet may do little for early loss, but it seems to matter more for keeping weight off [6]. If earlier attempts didn't last, that is common and doesn't mean you failed. ## How does activity help with weight management? On its own, activity has a small effect on the scale, but it changes body composition and helps keep lost weight off [16]. It also improves health at any weight, whether or not your weight changes [4]. In adults with overweight or obesity, regular activity, with or without weight loss, can improve blood pressure and blood fats [17]. European guidelines add that it reduces fat deep in the belly, builds muscle and bone, supports keeping weight stable over time, and reduces anxiety and depression [7]. How much you need depends on your goal. 150 minutes a week improves heart health, but it is generally not enough for a meaningful amount of weight loss without eating less [18]. Moderate activity of 150–250 minutes a week appears to prevent weight gain and give modest loss, and more than 250 minutes a week is suggested for keeping weight off after losing it [1]. For meaningful weight and body fat loss, 300–420 minutes a week is recommended [4]. Each extra 30 minutes of aerobic exercise a week may help adults with overweight or obesity slightly reduce body weight, waist size and body fat [19]. No single figure suits everyone, so build up at your own pace and pair activity with eating changes. ## When to check with a health professional If you're starting exercise after a long break, it's always a good idea to see your doctor first. For an injury or a health condition, see a health professional, such as your doctor or a physio. That includes before changing your eating or activity if you have diabetes, high blood pressure, heart disease or joint pain. Being inactive carries higher risks than the short-term risks of an exercise session, so the aim is to build up gradually rather than avoid activity [20]. If a muscle or joint is sore, ease off. If it persists or gets worse, see a doctor or other health professional. If you feel unusually tired, get it checked by a doctor. Call your local emergency number for chest pain or pressure (or pain spreading to the arm, neck, jaw or back, especially with sweating or feeling sick), severe breathlessness, fainting or collapse, signs of a stroke, a serious injury, or someone who isn't safe. If you have thoughts of self-harm, contact a local crisis line (findahelpline.com lists free services in every country), along with your local emergency number. If low mood or distress is weighing on you, talk to your doctor or a mental health service. If you have or think you may have an eating disorder, see a doctor or contact an eating disorder support service (findahelpline.com lists them by country). Sudden or strict dieting isn't advised. ## Quick answers ### Is exercise or diet more important for losing weight? Both play a part. Eating changes tend to drive early weight loss, while activity does more for body composition, health and keeping weight off. They work best together. Which matters more for you depends on your goal, so it helps to make small changes to both rather than relying on one. ### Do I need to count calories? You don't need to count every calorie to start. Calorie figures are a rough guide, because your needs depend on your age, size and how active you are. Small, steady changes to what you eat and how much you move can be enough to begin with. ### Can I lose weight if I only have time for short bouts of activity? Activity of any length counts towards your weekly total, and there is no minimum of 10 minutes at a time. The NHS says weekly activity can be broken up into shorter sessions. Several short walks through the day add up, so start with what fits your day. ## Sources 1. Romieu I et al. (2017). Energy balance and obesity: what are the main drivers? Cancer Causes & Control. https://pmc.ncbi.nlm.nih.gov/articles/PMC5325830/ 2. Behind the hype: Weight loss diets - NPA162. healthed.govt.nz. https://healthed.govt.nz/products/behind-the-hype-weight-loss-diets-npa162 3. National Institute of Diabetes and Digestive and Kidney Diseases (2026). Choosing a Safe & Successful Weight-loss Program. https://www.niddk.nih.gov/health-information/weight-management/choosing-a-safe-successful-weight-loss-program 4. Johnson NA et al. (2021). Physical activity in the management of obesity in adults: A position statement from Exercise and Sport Science Australia. Journal of Science and Medicine in Sport. https://doi.org/10.1016/j.jsams.2021.07.009 5. Most J, Redman LM (2020). Impact of calorie restriction on energy metabolism in humans. Experimental Gerontology. https://pmc.ncbi.nlm.nih.gov/articles/PMC9036397/ 6. Johns DJ et al. (2014). Diet or exercise interventions vs combined behavioral weight management programs: a systematic review and meta-analysis of direct comparisons. Journal of the Academy of Nutrition and Dietetics. https://pmc.ncbi.nlm.nih.gov/articles/PMC4180002/ 7. Yumuk V et al. (2015). European Guidelines for Obesity Management in Adults. Obesity Facts. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5644856/ 8. Samdal GB et al. (2017). Effective behaviour change techniques for physical activity and healthy eating in overweight and obese adults; systematic review and meta-regression analyses. International Journal of Behavioral Nutrition and Physical Activity. https://doi.org/10.1186/s12966-017-0494-y 9. Carraça E et al. (2021). Effective behavior change techniques to promote physical activity in adults with overweight or obesity: A systematic review and meta-analysis. Obesity Reviews. https://doi.org/10.1111/obr.13258 10. Zamboni M et al. (2025). Weight cycling and its effects on muscle mass, sarcopenia and sarcopenic obesity. Reviews in Endocrine & Metabolic Disorders. https://pmc.ncbi.nlm.nih.gov/articles/PMC12534291/ 11. NHS. Tips to help you lose weight. https://www.nhs.uk/live-well/healthy-weight/managing-your-weight/tips-to-help-you-lose-weight/ 12. Pearson ES (2012). Goal setting as a health behavior change strategy in overweight and obese adults: a systematic literature review examining intervention components. Patient Education and Counseling. https://doi.org/10.1016/j.pec.2011.07.018 13. NHS. Understanding calories. https://www.nhs.uk/live-well/healthy-weight/managing-your-weight/understanding-calories/ 14. NHS. Overweight and obesity in adults. https://www.nhs.uk/conditions/overweight-and-obesity/ 15. Dombrowski SU et al. (2014). Long term maintenance of weight loss with non-surgical interventions in obese adults: systematic review and meta-analyses of randomised controlled trials. BMJ. https://pmc.ncbi.nlm.nih.gov/articles/PMC4020585/ 16. Westerterp KR (2013). Physical activity and physical activity induced energy expenditure in humans: measurement, determinants, and effects. Frontiers in Physiology. https://pmc.ncbi.nlm.nih.gov/articles/PMC3636460/ 17. Conradie-Smit M, Fourie G, May W (2025). Physical activity in obesity management. South African Medical Journal. https://doi.org/10.7196/SAMJ.2025.v115i9b.3603 18. Swift DL et al. (2018). The Effects of Exercise and Physical Activity on Weight Loss and Maintenance. Progress in Cardiovascular Diseases. https://doi.org/10.1016/j.pcad.2018.07.014 19. Jayedi A et al. (2024). Aerobic Exercise and Weight Loss in Adults: A Systematic Review and Dose-Response Meta-Analysis. JAMA Network Open. https://pmc.ncbi.nlm.nih.gov/articles/PMC11672165/ 20. Warburton DER et al. (2011). Evidence-based risk assessment and recommendations for physical activity clearance: Consensus Document 2011. Applied Physiology, Nutrition, and Metabolism. https://doi.org/10.1139/h11-062 --- Source: Twikka (https://twikka.com/learn/sustainable-approaches-to-weight). General information about physical activity, not medical advice.