I've been trying to lose weight since an I put on post op a couple of years ago. Finally weighed myself after a good 5 months and I've lost 3 kg since my first recorded measurement two years ago. I was feeling pleased until I looked closer. I've done a fair bit of biking and Pilates (suspension trainer, although I'm still quite rubbish at it); in the last year also hiking, trying to learn how to run again.
My scales do a percentage fat, muscle, tbw and bone.
bone is stable (2.0-2.1)
fat has gone from 22.3 to 21.3
Tbw 52.7 to 54.5
Muscle 38.1 to 35.8
I've no idea how accurate these scales or these calculation are, but they seem to suggest the majority of weight loss is in fact muscle loss 
Obviously I'm doing something wrong. What do I need to change?