How to Lose Belly Fat: What Works According to Research

To lose belly fat, you need to lose body fat overall: eat in a moderate calorie deficit, do regular aerobic exercise (which research links to visceral fat loss), strength train to keep muscle, sleep enough and cut back on alcohol. Ab exercises strengthen your core but do not burn the fat on top of it.

That last point is the most expensive myth in fitness. Let's look at the evidence, then at a plan that works for men and women.

Two kinds of belly fat

• Subcutaneous fat: the soft layer you can pinch. Mostly a cosmetic issue.
• Visceral fat: deeper, around the organs. Linked to higher risk of type 2 diabetes and heart disease, even in people who aren't heavy.

Good news: visceral fat tends to respond quickly to exercise and weight loss.

A simple check is your waist measurement (measured at the belly button, relaxed, after breathing out). Common health thresholds: above 35 inches (88 cm) for women and 40 inches (102 cm) for men indicate higher risk. Lower thresholds are used for some ethnic groups, so ask your doctor.

Why crunches don't flatten your belly

In a 2011 study by Vispute and colleagues, adults did 7 abdominal exercises, 2 sets of 10 reps, 5 days a week for 6 weeks. Compared with a control group, abdominal fat did not decrease. Their core endurance improved, which is useful, but the fat stayed.

Fat loss comes from the whole body, in an order largely set by genetics and hormones. You can't choose where it comes from first.

What does work

1. A moderate calorie deficit

Belly fat goes when total fat goes. A deficit of 300 to 500 calories a day is a sustainable start. How to set it: calorie deficit.

2. Aerobic exercise

A 2012 meta-analysis by Ismail and colleagues found that aerobic exercise reduced visceral fat, while resistance training alone did not significantly reduce it. Brisk walking, cycling, swimming, jogging and HIIT all count.

Target: 150 to 300 minutes a week of moderate activity (or 75 to 150 minutes of vigorous), in line with public health guidelines.

3. Strength training

It doesn't target belly fat directly, but it protects muscle during a deficit and improves how your body handles blood sugar. Two to three sessions a week: see our beginner workout plan.

4. Protein and fiber

Protein (0.7 to 1 g per lb, 1.6 to 2.2 g/kg) keeps you full and protects muscle. Fiber from vegetables, legumes, oats and fruit helps appetite control.

5. Less alcohol and fewer sugary drinks

They add easy calories without fullness. Cutting them is often the simplest first deficit.

6. Sleep and stress

Short sleep increases appetite. Aim for 7 to 9 hours. Chronic stress tends to push eating up, too.

A 12-week belly fat plan

Measure your waist every two weeks. A drop of 1 to 2 inches (2.5 to 5 cm) over 12 weeks is a realistic, meaningful result for many people.

For women over 40

Around menopause, fat tends to shift toward the abdomen as estrogen drops. The tools are the same, but strength training becomes even more important to protect muscle and bone. See menopause and strength training.

Things that don't work

• "Belly fat burner" pills and teas.
• Waist trainers and sweat belts (temporary water loss).
• Detox diets.
• Thousands of crunches.

When to see a doctor

If your waist is above the thresholds, or you have high blood pressure, high blood sugar or a family history of diabetes or heart disease, a check-up is worth it. Belly fat can be a marker of metabolic risk that deserves medical attention.

Next step

Pair your deficit with walking (walking for weight loss) and 2 to 3 strength sessions a week. If you want a ready-made 12-week plan, home or gym, with progression and a log, see our programme.

Frequently asked questions

How long does it take to lose belly fat?

It depends on how much you have and the size of your deficit. With a moderate deficit and regular exercise, many people notice a smaller waist within 4 to 8 weeks, and significant changes over 3 to 6 months. Visceral fat often responds earlier than the pinchable fat underneath the skin.

What foods help burn belly fat?

No food burns fat directly. Foods help indirectly when they make a calorie deficit easier: protein (eggs, fish, chicken, legumes, Greek yogurt), high-fiber vegetables and fruit, whole grains and soups. Cutting sugary drinks and alcohol usually makes the biggest difference.

Can walking reduce belly fat?

Yes. Brisk walking is aerobic exercise, the type most consistently linked to visceral fat reduction, and it's easy to do daily. Combined with a calorie deficit, building up to 7,000 to 10,000 steps a day is a solid plan. See walking for weight loss.

Why is belly fat the last to go?

Fat distribution and the order in which you lose fat are largely genetic and hormonal. Many men store and lose fat last around the abdomen, many women around hips and thighs, though menopause shifts storage toward the belly. Keep going; it does reduce as total body fat falls.

Do waist trainers work?

No. They compress your waist temporarily and can make you sweat, but they don't remove fat. Wearing them for long periods may also restrict breathing and weaken your core muscles. Spend that money on good shoes for walking instead.

Is belly fat dangerous even if I'm not overweight?

It can be. A large waist relative to your height is linked to higher metabolic risk even at a "normal" BMI. If your waist is above recommended thresholds, ask your doctor to check blood pressure, blood sugar and cholesterol.

Studies cited

• Vispute SS et al. (2011). The Effect of Abdominal Exercise on Abdominal Fat. Journal of Strength and Conditioning Research. doi:10.1519/JSC.0b013e3181fb4a46
• Ismail I et al. (2012). A systematic review and meta-analysis of the effect of aerobic vs. resistance exercise training on visceral fat. Obesity Reviews. doi:10.1111/j.1467-789X.2011.00931.x