How fast should I lose weight?
A common guideline is roughly 0.5 to 1 percent of bodyweight per week. Faster loss increases the risk of losing muscle, feeling exhausted, and rebounding. Slower loss is easier to maintain and far more likely to still be there a year later.
What the range looks like
For an 80 kg person that is roughly 0.4 to 0.8 kg per week. Leaner people should sit at the lower end, since there is less fat available to draw on and the risk of losing muscle rises. People carrying more body fat can often tolerate the upper end comfortably, particularly early on.
The costs of going faster
- Muscle loss: Aggressive deficits without enough protein or resistance training cost lean tissue, which is exactly what you want to keep.
- Training quality: Strength and work capacity fall, so the training that protects your muscle becomes less effective.
- Adherence: Severe restriction produces hunger, irritability, and preoccupation with food, which is how most attempts end.
- Rebound: Rapid loss driven by rules you cannot sustain usually reverses when normal eating resumes.
The early drop is not all fat
The first week often shows a large fall, most of which is water and glycogen rather than fat. This is normal and it stops. Expecting week one's rate to continue is a reliable way to feel like a working plan has failed.
Planning a realistic timeline
Work backwards. Ten kilograms at 0.5 kg a week is around 20 weeks, plus some allowance for holidays and stalls, so five to six months is realistic. Setting a deadline that requires 1.5 kg a week almost guarantees a rate you cannot hold.
Diet breaks are useful
Periods at maintenance calories, whether one week in six or a longer stretch, give hunger, hormones, and training performance a chance to recover. They lengthen the total timeline slightly and improve the odds of finishing considerably.
If you are losing weight without trying, or the pace of loss is causing dizziness, missed periods, or persistent exhaustion, stop and speak with a doctor.
