Is it normal to lose 5kg in less than a week ?

It is possible but highly unlikely. Are you sure you didn't miscalculate your weight?

 

To lose 5 kg in less than I week you would have to be on a huge caloric deficit , Which would mean a lot of working out with very little food. Which seems inconsistent with what you said. And also this would be very unhealthy to do and you wouldn't feel very good doing it .

So it is inconsistent with what you described

 

I did it once, when I was bedridden with COVID and reduced to eating small cups of chicken soup!

 

I lose 5kgs in a week every time I go back on keto. For me though, it’s water weight.

 

Well if you ate above maintenance and still lost 5 kg in one week ,that makes what you said make no sense. Either it is weight lost through water , or you miscalculated .

 

It seems you lack understanding the meaning of the word maintenance but you do you man?

 

Idk around 20 maybe 30

 

As a personal trainer, if you are losing weight due to water loss, because of restarting a fitness program, this is normal. Especially if you are drinking 32 oz/day or more, it's normal.

The water loss is going to stop, then you can lose actual body fat.

 

On my own weight loss journey i lost a fair whack the first week. It slowed down some. Turns out it was water weight. Keep the journey up though, and don't get discouraged of your progress appears to slow. Take the long game.

 

It's not normal, but if you went from doing nothing and eating poorly, to suddenly working out and doing other exercising and watching the calories in, it is possible. I would not expect it to keep happening, I would expect a little to no weight loss in the next week, and then try to level it off so you lose 1-2 lbs per week if your goal is weight loss.