You can't crunch away belly fat. Here's what works

Every week someone asks me for a belly workout. Fifty crunches a day, a plank challenge, that twisting machine in the corner. I understand why. The belly is where it shows, so it feels like it should be where you fix it.

It does not work that way, and the sooner you accept it the faster your waist comes down.

Why spot reduction fails

When you do crunches, your abdominal muscles burn energy, but they pull it from your whole body's fat stores, not from the layer sitting on top of them. Studies that had people train one leg or one arm for weeks found no difference in fat between the trained and untrained side.

A hundred crunches burns about 30 to 40 kcal. One samosa is 250. You cannot out-crunch a samosa. Also, if you are a man, the belly is usually the last place fat leaves. For many women it is the hips and thighs. Genetics decide the order. You decide whether the total goes down.

What actually moves the waist

Three things, in this order of importance.

1. A moderate calorie deficit you can hold for months. Not a crash.
2. Enough protein, so the weight you lose is fat and not muscle.
3. Strength training three times a week, so your body has a reason to keep the muscle and you end up looking lean rather than just smaller.

Everything else, cardio, steps, sleep, less alcohol, helps by making the first point easier.

A worked example: Nikhil, 82 kg, waist 96 cm

Nikhil is 33, works in a bank in Surat, sits most of the day, walks about 4,000 steps. His maintenance is roughly 2,400 kcal a day. He was eating around 2,700 without realising it: two sugary chais, a 4 pm vada pav, and late dinners.

The plan was not dramatic.

That takes him from a 300 kcal surplus to a 400 to 500 kcal deficit, roughly 1,950 kcal eaten. Protein went up to 130 g a day: 3 eggs at breakfast, 150 g chicken or 200 g paneer at lunch, a bowl of curd at 5, dal and 100 g paneer at dinner. Weights three days a week, full body, 45 minutes.

Results after 12 weeks: 82 to 75.5 kg, waist 96 to 87 cm. He did maybe five sets of ab work a week and only because he liked how it felt. The belly did not go first. The face and shoulders changed in week three, the belly started around week six, and the lower belly last.

Measure the waist, not the mirror

Waist tape, at the navel, relaxed, after the toilet and before breakfast, once a week on the same day. The mirror lies depending on lighting, time of day, and mood. The tape does not.

Expect 0.5 to 1 cm a week when things are going well, and plateaus of two weeks that mean nothing. Weight will bounce around 1 kg day to day, so judge by the weekly waist and the weekly average weight together. The waist chart in Repyra plots exactly that reading so the daily noise disappears.

Should you train abs at all?

Yes, a little, for strength and posture, not for fat loss. Two or three exercises, twice a week, is plenty.

• Plank: 3 sets of 30 to 45 seconds.
• Dead bug: 3 sets of 8 each side, slow.
• Cable crunch or hanging knee raise: 3 sets of 12.

Squats, deadlifts and overhead presses already train your core hard. The six-pack is there under everyone's belly. Whether you see it is 90 percent waist size.

Things people waste money on

Fat-burner capsules, sweat belts, green coffee, detox teas, the vibrating belt machine. None of them change the deficit. Some of them raise your heart rate enough to be unpleasant. Apple cider vinegar at night does nothing for your waist either. Spend the money on a tape measure, a kitchen scale, and paneer.

Belly fat comes off the same way it went on: slowly, from the whole body, as a result of what you eat most days. Crunches are optional. The deficit is not.