Plans for Your Body · Weight & body composition
The visceral fat plan
The fat that matters is the fat you can’t pinch.
The goal: Visceral fat sits around your organs, drives insulin resistance and inflammation, and is usually among the first fat to go when you do things right. Measure your waist, lower insulin, eat in a window, fast once a week, do cardio that makes you breathe hard plus strength training, sleep, and cut alcohol. Retest your waist monthly.
Crunches won’t do it, and neither will a belly-fat tea. The fat behind your abdominal wall isn’t cosmetic: it’s an active organ pumping fatty acids and inflammatory signals straight into your liver. The good news is that it’s also the most responsive fat you have. This plan goes after it directly and measures it with a tape.
- MeasureWaist-to-height · fasting insulin · triglycerides · optional DEXA
- ChangeLower insulin · eating window · weekly 36-hour fast · cardio and strength · sleep
- RetestWaist monthly, labs at 4–6 months
Most people chase the scale. This chases the fat that’s hurting them.
Not medical advice
Discuss everything here with a medical doctor before acting on it — supplements included. Your doctor has your bloodwork and history. We have neither.
02 Why it matters
Not all fat is equal.
The default
Weigh yourself, feel fine about the number, ignore the waist. People with a normal BMI and a large waist carry much of the risk of obesity without the label, and nobody tells them. That’s why Ross, Després and an international working group want the waist measured as a vital sign, alongside BMI.
The better bet
Visceral fat tends to go first. With just 5% weight loss, visceral fat fell about 9%; at 16%, about 30%. Exercise shrinks it even when the scale barely moves. It’s the most dangerous fat you carry, and usually among the first to leave. How much and how fast varies from person to person.
Knowing where the fat sits changes how you go after it. Here’s the mechanism.
03 How it works
A storage problem that runs straight to your liver.
When insulin stays high and the fat under your skin fills up, the surplus gets packed around your organs. That visceral fat drains directly into the liver, pushing it to make more sugar and more triglycerides, and it releases inflammatory signals. Lower insulin and give the body a reason to burn stored fat, and visceral fat is usually near the front of the line.
- Subcutaneous fat
- The fat you can pinch. Mostly storage, relatively harmless, and slower to leave.
- Visceral fat
- Packed around the liver, gut and other organs. Metabolically active and inflammatory. Després’s point, from 30-plus years of imaging studies: it predicts heart and metabolic disease even after you account for total body fat. Quick to build, and usually quicker to lose than the fat you can pinch.
- Waist-to-height ratio
- Your waist divided by your height. Under 0.5 is healthy; 0.5–0.59 is increased risk; 0.6 and over is high risk. Works for everyone, regardless of sex or ethnicity.
- Hypertriglyceridemic waist
- Després’s group found that a big waist plus high triglycerides flags the dangerous pattern (high insulin, more LDL particles, small dense LDL) far better than either number alone. In men, a waist of 90 cm or more with triglycerides of 2.0 mmol/L or more was the warning combination. Two cheap numbers; no scan needed.
- Insulin
- High insulin favours fat storage. Lowering it is what lets the body draw on visceral fat between meals. When fat under the skin can’t expand to take the surplus, it spills over to the organs, and the waist is often the first visible sign of insulin resistance.
- Cortisol, sleep, alcohol
- Chronic stress, short sleep and alcohol all favour fat around the middle. They’re not side issues.
04 The steps
Measure the waist. Lower insulin. Move hard. Retest monthly.
Measure · Week 0
Know your starting point.
- Waist-to-heighttape measure, morning
Measure at the belly button, relaxed, after breathing out. Divide by your height in the same units.
- Fasting insulin and glucosemorning, after an overnight fast
Together they give HOMA-IR, a simple insulin-resistance score. Fasting insulin often isn’t covered in Canada. It’s cheap to pay for.
- Lipid paneltriglycerides and HDL
High triglycerides and low HDL are visceral fat’s fingerprints. Your TG/HDL ratio tracks it for free.
- DEXA scanoptional, self-pay
Measures visceral fat directly. Useful if you want a hard number, not essential.
Change the inputs · Months 1–6
Lower insulin. Give the body a reason to burn.
- Sugar and refined carbscut hard
Sugar, sweet drinks, juice, white flour and most packaged snacks. The fastest lever on insulin, blood sugar and triglycerides. Sugar and fructose in particular are turned into fat in the liver, right where visceral fat does its damage.
- Real foodprotein first
Build meals on protein, vegetables and natural fats: fish, meat, eggs, dairy, legumes, nuts. Protein and fibre keep you full and flatten glucose spikes. Protein also protects muscle while you lose fat. Make the first meal of the day a substantial protein meal, not a pastry.
- Eating windowdaily, e.g. noon to 8 pm
Eat inside a fixed window and not outside it. Fewer insulin spikes per day, fewer chances to overeat.
- 36-hour fastonce a week
Dinner one day, then only water, black coffee or tea until breakfast two days later. A standard protocol in Dr. Fung’s clinic: long enough for insulin to fall and the body to draw on stored fat. A pinch of salt helps with headaches. Jamnadas’s point: once insulin falls during a fast, visceral fat is among the first stores the body draws on.
- Cardio that makes you breathe hard150+ min/week, moderate to vigorous
Brisk walking uphill, cycling, rowing, running. In pooled trials, moderate-to-vigorous aerobic exercise cut visceral fat even without dieting. In Robert Ross’s 300-person trial, the total amount mattered most for the waist; the harder sessions added a blood-sugar benefit.
- Trainingstrength 2–3×/week
Lift, and walk briskly or cycle most days. Muscle is where most of a meal’s glucose ends up, so more muscle means more room for it. Cardio makes that muscle more sensitive to insulin. Strength training keeps the muscle that makes all of this work.
- Sleep7+ hours
One short night measurably worsens insulin sensitivity, blood sugar and appetite the next day. The cheapest part of the protocol, and the most skipped.
- Alcoholnone while fixing the numbers
It goes straight to the liver, raises triglycerides and adds to liver fat. Less is better; none is best while you’re fixing the numbers. Alcohol is processed in the liver and favours fat around the middle. It’s the fastest single cut for most waists.
Before you fast
Don’t do extended fasts if you’re on insulin or other diabetes medication, pregnant, breastfeeding, underweight, or have a history of eating disorders, unless your doctor approves.
Supplements · optional, with your doctor’s OK
One worth considering.
- Psyllium husk~5 g, twice a day, with a full glass of water
A soluble fibre. Always with plenty of water: taken dry, it can choke or block. Soluble fibre keeps you full and blunts glucose spikes, which makes the eating window easier to hold.
Find it on Amazon: Psyllium husk
Retest · Monthly, and at 4–6 months
Let the tape decide.
- Waistmonthly, same conditions
Same time of day, same spot. The waist moves before the scale does.
- Labs4–6 months
Fasting insulin, triglycerides and HDL. They usually improve as visceral fat falls. Watch the waist-plus-triglycerides pair in particular.
- If the numbers won’t moveyour doctor
Take the before-and-after numbers to your doctor. Whether you need medication is their call. Needing it isn’t failure. If your waist won’t move after 4–6 months of doing this properly, ask your doctor to look for causes like thyroid, sleep apnea or medication.
05 The rules
Short list. No exceptions.
Choose
- Protein and vegetables at every meal
- A fixed eating window, and one 36-hour fast a week
- Cardio that makes you breathe hard, most days
- Strength training 2–3 times a week, and 7+ hours of sleep
Avoid
- Sugar, sweet drinks, juice and white flour
- Alcohol, especially beer and nightly drinks
- Crunches as a fat-loss plan. You can’t spot-reduce
- Judging progress on the scale alone
Non-negotiables
- Measure your waist, not just your weight.
- Talk to a medical doctor before you fast or start a supplement.
- Keep the protein and strength training, or you’ll lose muscle with the fat.
- Retest monthly. If it isn’t moving, change something.
06 Checkpoints
What to track, and what good looks like.
Simple, cheap and honest: most of this needs a tape measure.
| What | Target | How and when |
|---|---|---|
| Waist-to-height | <0.5 healthy · 0.5–0.59 increased risk · 0.6+ high risk | Monthly, at the belly button, after breathing out. |
| Waist | Men <102 cm (40 in) · women <88 cm (35 in) | Lower thresholds apply for people of Asian descent; waist-to-height works for everyone. |
| TG/HDL ratio | <0.9 (mmol/L) · <2 (mg/dL) | From your lipid panel, every 4–6 months. |
| Waist plus triglycerides | Not both high (men: waist ≥90 cm with TG ≥2.0 mmol/L is the warning pair) | Després’s hypertriglyceridemic-waist screen. Cut-offs were set in men; women’s are less settled, so use waist-to-height too. |
| HOMA-IR | Under ~1.0 ideal; over ~2.5 suggests insulin resistance | Fasting glucose (mmol/L) × fasting insulin (µU/mL) ÷ 22.5. |
| Visceral fat (DEXA) | Falling | Optional, every 6–12 months. |
The scale can stall while your waist shrinks, especially if you’re building muscle. Trust the tape.
07 Where experts disagree
Where the experts don’t agree.
Everyone agrees visceral fat is the dangerous kind. They disagree on the best way to shift it.
Diet or exercise?
Exercise first: Verheggen et al., Ross
In 117 studies, exercise cut visceral fat about as much as diet, sometimes more, despite far less weight loss. In Ross’s trial in men, exercise without weight loss still reduced visceral fat.
Insulin first: Fung, Jamnadas
You can’t outrun high insulin. Lower it with diet and fasting, and the body can finally reach its stores.
Our read Do both. Exercise is unusually good at visceral fat specifically; lowering insulin is what makes the rest of the fat available.
Is fasting better than just eating less?
Fasting: Fung, Jamnadas
Fasting drops insulin long enough for the body to dip into its fat stores, visceral fat included.
Trialists: Liu et al.
In a 12-month trial, time-restricted eating plus calorie restriction did no better for weight or body fat than calorie restriction alone.
Our read Fasting works largely because it makes eating less easy to sustain. If it’s the method you’ll keep doing, it’s the right method.
Does the intensity matter?
Amount matters most: Ross
In his 24-week trial of 300 adults with abdominal obesity, the waist shrank by a similar amount at a moderate or a vigorous pace. Only the vigorous group improved blood sugar.
Push harder: Vissers et al.
Pooled trials show visceral fat falls with moderate or high-intensity aerobic training; the case for gentle exercise alone is weaker.
Our read Do enough, most days, first. Make some of it hard for the blood-sugar benefit. Keep lifting so the muscle stays.
Is the waist a good enough measure?
Yes, as a vital sign: Després, Ross
The waist adds risk information BMI misses. It should be measured at every check-up and tracked as a treatment target.
Image it: imaging researchers
A tape can’t tell visceral fat from the fat under the skin. CT, MRI or DEXA measure the visceral store directly.
Our read The tape is good enough for most people, and it’s free. Pair it with triglycerides. Scan only if a number would change what you do.
08 Limits
What this plan won’t fix.
Where your body stores fat
Genes, sex and age decide where fat goes first and leaves last. Men and post-menopausal women store more viscerally. You can shrink it, not choose its address.
Spot reduction
A thousand crunches build abdominal muscle under the same fat. Fat loss is whole-body; visceral fat just tends to leave first.
Medical causes
Some medications (steroids, some antidepressants and antipsychotics), thyroid problems and Cushing’s syndrome drive abdominal fat. If nothing moves, ask your doctor.
The plan empties the dangerous stores. It doesn’t choose where your body keeps the rest.
09 Resources
Worth your time.
Why this cardiologist recommends fasting
Jamnadas on visceral fat, insulin and fasting, in his own words.
The Obesity Code
Why insulin, not calories, decides where fat goes and whether it leaves.
The Complete Guide to Fasting
How to run the 16-hour, 24-hour and 36-hour fasts this plan uses.
Waist circumference as a vital sign in clinical practice
The international consensus on why the tape belongs in every check-up, and how to measure it.
Visceral and ectopic fat, atherosclerosis, and cardiometabolic disease: a position statement
What visceral and liver fat do to the heart, and how they respond to treatment.
10 Questions
Questions, answered plainly.
What is the fastest way to lose belly fat?
Cut alcohol, sugar and refined carbs, eat in a window, and do cardio that makes you breathe hard most days, plus strength training. Visceral fat is usually among the first fat to go, and the waist often shows it within weeks. Results vary.
How do I know if I have visceral fat?
Divide your waist (at the belly button) by your height. Over 0.5 suggests excess visceral fat. A large waist plus high triglycerides on your lipid panel makes it more likely still. A DEXA scan can measure it directly.
Can I lose belly fat without losing weight?
Often, yes. In trials, exercise reduced visceral fat even when the scale barely moved, especially with muscle being built at the same time. That’s why the tape beats the scale.
Do crunches burn belly fat?
No. They strengthen the muscle underneath. Fat loss happens across the whole body; visceral fat just leaves first.
Why is my belly growing when my weight isn’t?
Age, menopause, stress, poor sleep, alcohol and lost muscle all shift fat toward the middle. This plan addresses each.
11 Sources
Where this comes from.
Experts drawn on
- Jean-Pierre Després, PhD — Professor of kinesiology, Université Laval; scientific director, International Chair on Cardiometabolic Risk. Among the first to show visceral fat is the dangerous kind; described the hypertriglyceridemic waist.
- Robert Ross, PhD — Professor of kinesiology and health studies, Queen’s University. Led trials on exercise, visceral fat and the waist; lead author of the waist-as-a-vital-sign consensus.
- Pradip Jamnadas, MD — Cardiologist, Florida. Clinical assistant professor; visceral fat and fasting are central to his teaching.
- Jason Fung, MD — Nephrologist, Toronto. Author of The Obesity Code and The Complete Guide to Fasting.
- Rebecca Verheggen, PhD — Lead author of the 2016 meta-analysis of exercise versus diet for visceral fat.
Sources
- A systematic review and meta-analysis on the effects of exercise training versus hypocaloric diet: distinct effects on body weight and visceral adipose tissue. Obesity Reviews, 2016.
- The effect of exercise on visceral adipose tissue in overweight adults: a systematic review and meta-analysis. PLOS ONE, 2013.
- Factors associated with percent change in visceral versus subcutaneous abdominal fat during weight loss. International Journal of Obesity, 2008.
- Keep the size of your waist to less than half of your height, NICE recommends. National Institute for Health and Care Excellence, 2022.
- Calorie restriction with or without time-restricted eating in weight loss. New England Journal of Medicine, 2022.
- Waist circumference as a vital sign in clinical practice: a Consensus Statement from the IAS and ICCR Working Group on Visceral Obesity. Nature Reviews Endocrinology, 2020.
- Visceral and ectopic fat, atherosclerosis, and cardiometabolic disease: a position statement. The Lancet Diabetes & Endocrinology, 2019.
- Hypertriglyceridemic waist: a marker of the atherogenic metabolic triad (hyperinsulinemia; hyperapolipoprotein B; small, dense LDL) in men?. Circulation, 2000.
- Reduction in obesity and related comorbid conditions after diet-induced weight loss or exercise-induced weight loss in men: a randomized, controlled trial. Annals of Internal Medicine, 2000.
- Effects of exercise amount and intensity on abdominal obesity and glucose tolerance in obese adults: a randomized trial. Annals of Internal Medicine, 2015.
- Why this cardiologist recommends fasting, with Dr Pradip Jamnadas. Feel Better, Live More podcast.
Not medical advice
Discuss everything here with a medical doctor before acting on it — supplements included. Your doctor has your bloodwork and history. We have neither.