Why aren’t you losing weight on a diet?

Why aren’t you losing weight on a diet?
Natalia Goździak

Natalia Goździak

Publication: 2025-02-27

You’ve been following a strict diet for three weeks, avoiding your favorite snacks, and walking 10,000 steps daily, but instead of the desired weight loss, you see additional pounds on the scale? Does that sound familiar? It can be incredibly frustrating, and it might make you question whether all your efforts are worth it. Before you give up, though, it's essential to understand what might be causing the lack of progress. Here’s what could be behind the issue of not losing weight, even when you feel like you’re doing everything right.

Why isn't the scale moving?

There are many factors influencing weight loss that are not always obvious. Besides the calorie deficit, things like water retention, metabolic adaptation, stress levels, sleep quality, and hidden calories in your daily diet all play a role. Moreover, it’s important to remember that the scale doesn’t always reflect the true changes in body composition. Gaining muscle while losing fat may keep the number on the scale unchanged, which often leads to the question: Why can’t I lose weight?

Here are a few potential reasons why you might not be seeing results:

    1. Water retention

    Your weight can fluctuate due to hydration levels, salt intake, hormonal cycles, or stress. This is normal and doesn’t necessarily indicate a lack of progress. In fact, certain stages of your cycle or high-stress periods can cause your body to retain water.

    2. Metabolic adaptation

    The longer you stay in a calorie deficit, the more your body may slow down its metabolism to conserve energy. This could result in fewer spontaneous movements (NEAT) and a lower basal metabolic rate (BMR), making weight loss slower or more difficult over time.

    3. Incorrect measurement methods

    The scale isn’t always the best indicator of progress. Even with a calorie deficit, your weight might not drop due to factors like muscle gain or fluctuations in water retention. Instead of just focusing on weight, measure body circumference, body fat percentage, or how your clothes fit.

    4. Dietary mistakes

  • Too low of a caloric deficit: Optimal caloric deficit should be around 10-20% of your daily energy needs. For instance, if your daily requirement is 2500 kcal, aim to consume 2000-2250 kcal per day. Eating too few calories can lead to nutrient deficiencies and metabolic slowdown.

  • Hidden calories: Be mindful of “hidden” calories in foods labeled as healthy. Control portion sizes, read labels carefully, and opt for whole, unprocessed foods. Instead of sugary drinks, go for water, herbal teas, or black coffee. Also, limit the use of fats when cooking and prefer healthier methods like baking or steaming.

  • 5. Nutrient deficiency

    Lack of essential nutrients such as protein, fiber, healthy fats, and complex carbohydrates can sabotage weight loss efforts. Protein supports satiety, fiber promotes digestion, and healthy fats and carbs fuel your metabolism. Be sure to include lean proteins (chicken, fish, eggs, legumes, tofu), fiber-rich foods (vegetables, fruits, whole grains), and healthy fats (avocados, olive oil, nuts, fatty fish) in your meals.

    6. Physical activity

    Exercise is crucial for weight loss, but it’s important to choose the right type of exercise. Focusing solely on cardio exercises, like cycling or running, and neglecting strength training can slow progress. Strength training helps build muscle, which increases metabolic rate even when at rest. Additionally, consider incorporating HIIT (high-intensity interval training), which can burn more calories and boost metabolism in a shorter time.

    7. Stress, sleep, and hormones

    High stress levels and lack of sleep can disrupt metabolism and promote fat retention. Elevated cortisol, the stress hormone, can lead to water retention and increased cravings for high-calorie foods. Similarly, insufficient sleep can impair hunger-regulating hormones, causing you to eat more than needed. Aim for 7-9 hours of quality sleep per night and find ways to manage stress, such as through meditation or relaxation techniques.

What can you do to start losing weight?

If your weight is stuck, here are a few strategies to help you break through the plateau:

  • Reevaluate your calorie deficit

    It’s possible that you’ve miscalculated your calorie needs and are still eating more than you should. Double-check your calorie requirements and adjust your intake accordingly.

  • Increase protein and fiber intake

    Both protein and fiber can help control hunger and keep you feeling full longer. Adding more of these to your diet may allow you to eat smaller portions while still getting all the necessary nutrients.

  • Incorporate strength training

    While cardio burns calories, strength training helps build muscle, which in turn boosts your metabolism. Incorporating resistance exercises (like weightlifting or bodyweight exercises) into your routine will help you burn fat more efficiently.

  • Prioritize sleep and manage stress

    Stress and sleep deprivation can make weight loss much harder. Aim for 7-9 hours of sleep per night, and practice stress reduction techniques to keep cortisol levels in check.

  • Be patient

    Weight loss is a gradual process. Sometimes, the effects of your efforts are visible only after several weeks. Don’t get discouraged by initial difficulties; consistency and regularity are key to long-term success.

Summary

If you're not seeing the desired weight loss results despite following a diet and regular exercise routine, many factors could be at play. Success in weight loss lies in balancing your diet, physical activity, and recovery. Stay patient, be consistent, and adjust your strategy if needed. Weight loss takes time, but with the right approach, you’ll eventually see the results you’ve been working for!

Bibliography:

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  2. Falcone PH, Tai C-Y, Carson LR, Joy JM, Mosman MM, McCann TR, et al. Caloric expenditure of aerobic, resistance, or combined high-intensity interval training using a hydraulic resistance system in healthy men. The Journal of Strength & Conditioning Research. 2015;29(3):779-85.

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  4. Leidy HJ, Ortinau LC, Douglas SM, Hoertel HA. Beneficial effects of a higher-protein breakfast on the appetitive, hormonal, and neural signals controlling energy intake regulation in overweight/obese,“breakfast-skipping,” late-adolescent girls. The American journal of clinical nutrition. 2013;97(4):677-88.

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Natalia Goździak

Natalia Goździak

Master of dietetics, specialist in dietoprophylaxis and dietotherapy

Copywriter and nutritionist Graduated from the University of Physical Education in Poznan with a bachelor's degree in sports dietetics, and from UP in Poznan with a master's degree in dietoprophylaxis and dietotherapy. She treats principles of healthy eating, however, first and foremost as valuable tips, and not as strict rules to be strictly followed Privately a photography enthusiast who cannot imagine life without books

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