I've been working on losing weight.
I am weighing myself weekly with a shops public digital scales.

Last week:
Body fat estimation:

Fat index = 57.7 %
Fat Mass = 10st 1.6lbs
Free F. Mass = st 6.0lbs

Weight: 17st 7.6 lb Height: 5ft 5

This week:
Body fat estimation:

Fat index = 48.7%
Fat Mass = 8st 7.4lbs
Free F. Mass = 8st 13.4lbs

Weight: 17st 7.2 lb Height: 5ft 5


Can someone please explain the difference between the Fat index/Mass/Free F. Mass?

Why did some increase and some decrease, even though I'd lost weight?

Thanks

Because these scales aren't accurate. If you are more hydrated one time than another, it affects the result. Quit concentrating on the scale and concentrate on healthy eating and exercise.

+1 digitsl scales body composition analysis is never great. Scales are good for weight numbers but outside of that I wouldn't pay too much attention to what they say.