So I've been doing IF/F5 for less than 4 weeks and I weighed myself for the first time today. I've lost 15 pounds (nearly 7 kg).
I'm a little worried, even though I guess a lot of that is water weight? I wouldn't worry except that I now weigh 102 pounds (46.5kg). Which is equal to the lightest Ive been. When I started 4 weeks ago I weighed 117 .5 pounds (54 kg) and my ideal weight (I thought) was around 50 - 52kg.
Basically though I think I just need to start building muscle now? I'm sure it will fluctuate and some of that weight will come back.