Key facts
- The CDC describes gradual weight loss as about 1 to 2 pounds a week. 1
- The CDC advises adults to get at least 150 minutes a week of moderate aerobic activity and 2 days of muscle strengthening. 2
- The NIDDK says experts recommend an initial goal of 5% to 10% of starting weight within 6 months. 4
- Six weeks of abdominal exercises alone did not reduce abdominal fat or body fat percentage in a randomized study. 7
What does lowering body fat percentage mean?
Body fat percentage is fat mass divided by total body weight. Two things lower it: losing fat mass, or adding lean mass such as muscle while fat stays the same. Usually both play a part, which is why the scale and the percentage can move in different directions. For ranges and what they mean, read the body fat percentage guide.
This page covers the habits that the CDC and the NIDDK describe for weight loss, and what they say about the pace. Neither agency promises a result. Individual results vary, and this page is general information, not a plan for you.
How fast is a reasonable pace?
The CDC says weight loss that is slow and steady, at a gradual pace of about 1 to 2 pounds a week, makes it easier to keep the weight off.1 The NIDDK frames the same idea over a longer window. It says experts recommend an initial goal of 5% to 10% of your starting weight within 6 months. For a 200 lb person, that is 10 to 20 lb.45
| Source | What it says | For a 200 lb person |
|---|---|---|
| CDC, Steps for Losing Weight | A gradual pace of about 1 to 2 pounds a week.1 | 4 to 8 lb in a 4 week month |
| NIDDK, weight-loss programs | An initial goal of 5% to 10% of starting weight within 6 months.4 | 10 to 20 lb in 6 months |
The 4 to 8 lb figure is 4 weeks times the CDC’s 1 to 2 pounds. It is arithmetic, not a prediction. The two sources frame gradual loss differently, and both describe a gradual pace.
The NIDDK also names warning signs in weight-loss programs. Promises such as “Lose 30 pounds in 30 days!” or losing weight in a specific part of your body are on its list of promises to stay away from.4 If a product or plan makes those claims, talk to a health care professional first, as the NIDDK advises.4
What do the CDC and NIDDK say about eating?
The CDC says most weight loss comes from eating fewer calories.2 It describes healthy weight loss as including healthy eating patterns and regular physical activity.1 The NIDDK puts the energy balance in one line: if you consume fewer calories than you use through physical activity, it may lead to weight loss.5
| Topic | What the source says | Source |
|---|---|---|
| Pattern | A healthy plan emphasizes vegetables, fruits, protein, dairy without added sugars, healthy fats and whole grains. | CDC3 |
| Limits | A healthy plan is low in added sugars, sodium, saturated fats, trans fats and cholesterol. | CDC3 |
| Calories | Stay within your daily calorie needs. | CDC3 |
| Whole grains | At least half of the grains you eat should be whole grains, per the Dietary Guidelines. | NIDDK6 |
| Saturated fat | The Dietary Guidelines recommend less than 10 percent of daily calories from saturated fats. | NIDDK6 |
| Tracking | A food and beverage diary helps you see your patterns and what to change. | NIDDK5 |
Paraphrased from the pages cited. The NIDDK adds that you do not have to give up all your favorite foods, but must keep track of total calories.6
The NIDDK also lists practical ideas: make a shopping list, ask for smaller servings, eat at a table without screens, and expect setbacks. It says to forgive yourself if you regain a few pounds and adjust your plan.5
How much activity helps?
The CDC advises adults to do at least 150 minutes a week of moderate-intensity aerobic activity, or 75 minutes of vigorous activity, or an equivalent mix, plus at least 2 days a week of muscle-strengthening activity.2 It adds that you may need more than the recommended minutes to maintain your weight, and that regular activity is the only way to maintain weight loss.2
The NIDDK is candid about the limits. It says increased physical activity may not have a big impact on weight loss, but has important health benefits independent of weight loss and may help keep off the weight you lose.4
Strength activities
The NIDDK recommends muscle-strengthening activities at least twice a week. It notes that doing so 2 or 3 days a week will not bulk you up, and that these activities may help you control your weight by increasing the amount of energy-burning muscle.6 Push-ups, some types of yoga and resistance bands count. See muscle mass for how muscle is measured.
Can you burn fat from one spot?
In a randomized study, 24 healthy sedentary adults did 7 abdominal exercises, 2 sets of 10, five days a week for six weeks, while a control group did nothing. All kept an isocaloric diet. There was no significant effect on body weight, body fat percentage, abdominal circumference or abdominal skinfolds. The exercises did improve muscular endurance.7 That fits the NIDDK’s warning against promises of losing weight in a specific part of the body.4
What about sleep?
The NIDDK says people who get too little sleep tend to weigh more than those who get enough. It lists possible reasons: tiredness that cuts exercise, more waking hours to eat, and a disrupted balance of appetite hormones.5 The CDC suggests regular bed and wake times and turning off electronic devices at least 30 minutes before bed.1
These are associations and suggestions, not proof that more sleep will lower your body fat percentage. They are included because the agencies list sleep alongside food and activity.
A worked example: how much weight is that?
Take a made-up person who weighs 200 lb at 30% body fat. Fat mass is 60 lb (200 × 0.30) and everything else is 140 lb. The goal is 25%.
| Assumption | Weight to lose | Check | Weeks at 1 to 2 lb a week |
|---|---|---|---|
| All weight lost is fat | 13.3 lb | (60 − 13.3) ÷ (200 − 13.3) = 25% | 6.7 to 13.3 |
| 79% of weight lost is fat, 21% is lean | 18.6 lb | (60 − 14.7) ÷ (200 − 18.6) = 25% | 9.3 to 18.6 |
In the second row, 79% comes from a 12-month study of 19 adults with obesity: of 8.9 kg lost, 7.0 kg was fat by DXA.8 It is one group, not a rule. Weeks are lb to lose divided by 2 and by 1.
Two lessons follow. First, the amount of weight needed is larger when some of what you lose is lean tissue, which is one reason the NIDDK pairs eating changes with muscle-strengthening activity.6 Second, the second row’s 18.6 lb is 9.3% of 200 lb, inside the NIDDK’s 5% to 10% initial range.4 That is a coincidence of the example, not a goal for you.
How do you know it is working?
Choose one measure and keep the conditions fixed. The NIDDK lists weekly weight checks as a feature of a good program.4 Body fat estimates from a tape, calipers or a scale carry errors of several percentage points, so read them over weeks, not days. The home measurement guide explains each method.
Waist size is a second signal. The NIDDK says women with a waist over 35 inches and men with a waist over 40 inches may be more likely to develop health problems, and that extra fat in the abdomen may put people at risk even if they are not overweight.5 See visceral fat and the waist-to-hip ratio. To estimate how many calories you burn, see how to calculate BMR.
When to talk to a health professional
General guidance is not a plan for you. Talk with a health care professional before starting if:
- You are thinking about a major change to how you eat or exercise, as the CDC advises talking with your health care provider about weight loss.
- You have a medical condition or take prescription medicines that could affect your weight or your ability to lose it.
- You are considering a program that promises fast results or loss from one body part.
- You are not sure what a healthy weight is for you, which the NIDDK suggests discussing with your provider.
Frequently asked questions
How can I lower my body fat percentage?
The CDC and NIDDK describe eating fewer calories within a healthy eating pattern, regular physical activity, muscle-strengthening activity at least twice a week and enough sleep. Results vary between people.1256
How fast can I lower body fat percentage?
The CDC describes gradual weight loss as about 1 to 2 pounds a week. The NIDDK names an initial goal of 5% to 10% of starting weight within 6 months. Neither source gives a pace for body fat percentage alone.14
Can I lower body fat percentage without losing weight?
Mathematically, yes: percentage falls if fat mass falls while lean mass rises. The NIDDK says muscle-strengthening activities increase energy-burning muscle.6 How much any one person changes is not something these sources quantify.
How do I lower body fat percentage without losing muscle?
The NIDDK recommends muscle-strengthening activities at least twice a week.6 In one 12-month study, of 8.9 kg lost, 7.0 kg was fat and about 1.4 kg was muscle by DXA.8 Some lean loss can occur during weight loss.
Can I lower body fat percentage for abs?
In a six-week randomized study, abdominal exercises alone did not reduce abdominal fat or body fat percentage.7 The NIDDK lists promises of losing weight in a specific body part as a warning sign.4
How much exercise do I need to lower body fat?
The CDC advises adults at least 150 minutes a week of moderate aerobic activity, or 75 minutes of vigorous, plus 2 days of muscle strengthening. It says you may need more to maintain weight.2
Does it work differently for women and men?
The CDC and NIDDK pages we read give the same pace and activity guidance for adults and do not split it by sex. Waist thresholds do differ: over 35 inches for women and over 40 inches for men.5
When should I see a doctor before trying to lower body fat?
Before a major change in eating or exercise, or if you have a medical condition, take medicines that could affect weight, or feel unwell. The NIDDK calls talking with a health care professional an important first step.4
Sources
- CDC, Steps for Losing Weight (page dated January 17, 2025), Centers for Disease Control and Prevention. Retrieved October 16, 2026
- CDC, Healthy Weight and Growth: Physical Activity (page dated April 7, 2026), Centers for Disease Control and Prevention. Retrieved October 16, 2026
- CDC, Healthy Weight and Growth: Healthy Eating (page dated April 29, 2026), Centers for Disease Control and Prevention. Retrieved October 16, 2026
- NIDDK, Choosing a Safe & Successful Weight-loss Program (last reviewed February 2024), National Institute of Diabetes and Digestive and Kidney Diseases, NIH. Retrieved October 16, 2026
- NIDDK, Healthy Eating & Physical Activity for Life: Health Tips for Adults (last reviewed September 2020), National Institute of Diabetes and Digestive and Kidney Diseases, NIH. Retrieved October 16, 2026
- NIDDK, Some Myths about Nutrition & Physical Activity (last reviewed April 2017), National Institute of Diabetes and Digestive and Kidney Diseases, NIH. Retrieved October 16, 2026
- Vispute SS, et al. The effect of abdominal exercise on abdominal fat. J Strength Cond Res. 2011;25(9):2559-2564, PubMed. Retrieved October 16, 2026
- Pietiläinen KH, et al. Agreement of bioelectrical impedance with dual-energy X-ray absorptiometry and MRI to estimate changes in body fat, skeletal muscle and visceral fat during a 12-month weight loss intervention. Br J Nutr. 2013;109(10):1910-1916, PubMed. Retrieved October 16, 2026