Reverse Dieting: How to Fix Your Metabolism After a Crash Diet

You went on an aggressive 1,200 calorie diet, lost 10kg, and now you gain weight eating 1,800 calories. Sound familiar? Your metabolism has adapted — and reverse dieting is how you fix it.

What Happens During Crash Diets

When you drastically cut calories, your body fights back with metabolic adaptation:

• BMR drops 15-25% — your body burns fewer calories at rest
• NEAT decreases — you unconsciously fidget less, move less, take fewer steps
• Thyroid hormones decrease — T3 and T4 drop, slowing metabolism further
• Hunger hormones spike — ghrelin (hunger) increases, leptin (satiety) decreases

This is why 95% of crash dieters regain all their weight (and more) within a year.

What Is Reverse Dieting?

Reverse dieting is the strategic, gradual increase of calories — typically 50-100 calories per week — to restore metabolic rate while minimising fat regain. Think of it as the opposite of a cut, done slowly and deliberately.

How to Reverse Diet

1. Week 1-2: Add 100 calories (from carbs) to your current intake. Monitor weight daily.
2. Week 3-4: Add another 100 calories. Some weight fluctuation is normal (mostly water and glycogen).
3. Continue adding 50-100 calories weekly until you reach estimated maintenance or you start gaining fat consistently.
4. Protein stays constant at 2g/kg bodyweight throughout.
5. Added calories come from carbs primarily, then fats — this refuels your training and supports thyroid function.

What to Expect

• Weight will increase 1-3kg initially — this is water and glycogen, not fat. Don’t panic.
• Energy levels improve dramatically — you’ll feel alive in the gym again
• Sleep improves — your body was running on fumes
• Lifts go up — more carbs = more glycogen = stronger workouts
• Minimal fat gain if done slowly — the key is patience

Supplements During Reverse Diet

Keep protein high with whey to maintain muscle while adding calories. Creatine is especially useful during this phase — it enhances training capacity as your workload increases with more energy.