You cut calories, the weight came off for a month, then it stopped. You’re eating less than ever and nothing moves.
That’s your body doing its job. When you eat less and lose weight, it burns less energy to protect itself. It’s called adaptive thermogenesis, or metabolic adaptation.
What the research found
US National Institutes of Health researchers followed 14 contestants from the TV show The Biggest Loser for 6 years after the competition. Their resting metabolism was still about 700 calories a day below where it started, even though on average they had regained about 41 of the 58 kg they lost (Fothergill et al., Obesity, 2016).
That was an extreme case: 58 kg lost in a 30-week televised competition. Most people will never lose weight that fast. But the lesson carries over. When you diet hard, your body can push back for years.
How to keep losing fat without fighting your body
- Lose it slower. Aim for a pace you could hold for months, not a crash.
- Keep your muscle. Strength training 2 to 3 times a week. Muscle is what you want to keep while the fat comes off.
- Eat enough protein. It helps protect muscle while you’re eating less.
- Measure body composition, not just weight. The scale can stall while fat still drops and muscle holds.
- Adjust the macros before the amount. When I want to drop body fat, I change the macros or the order I eat them in first. That worked for me because I tested it. Test your own changes before you cut further.
When to get tested
If you’re doing everything right and nothing moves, test before you cut further. Blood work through our partners at Orba Health can show whether something else is going on. Ask your doctor about thyroid function and blood sugar in particular. We work alongside them.
Physiology before strategy.
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