frankly, a body fat percentage drop from 31 to 22 % with a stable weight and no loss of inches sounds highly unlikely to me. I am wondering how long you have been training and how far apart those measurements have been taken.
Measuring body fat is not an exact science. There are several methods that can be used but all of them have shortcomings. How well your are hydrated and the time of day can play a role. It is very important to create identical circumstances when measuring.
My best guess is that there has been an error when the body fat was assessed.
Interesting that you have lost so much body fat (congratulations!!!) yet not seen any change in clothing size. I can understand that you might not lose much weight, but if you’ve dropped 9% bodyfat, there might be a little change in the way your clothes fit. Muscle is a lot more dense than fat so if your weigh is unchanged my guess is that your size would drop.
If I were your trainer, I’d be giving you a high five. What does your trainer say?
Were you dehydrated before and now you’re drinking an appropriate amount of water? That could also be part of the reason you haven’t noticed much of a bodily change, but you’d have an increase in your overall health.
Karin posted as I was typing, and she poses another good possibility. Bodyfat testing has an error in measurement, whether you use calipers or the hand-held machines. The time of day, the person doing the measurement, and your hydration will effect those readings.
But still, I believe you are to be applauded for taking steps in a great direction!
First, congratulations! That is quite a transition, and you should have seen some differences in how your clothing fits and/or some weight loss. However, I think a little more data is needed from you before we can guess the reasons why you haven’t lost weight.
Did your trainer use the same method to measure your body fat each time? If two different methods were used they will read differently. That could be one reason. Also, how heavy are you lifting with weight training?
It could be a variety of factors or error.
I would have to agree. This much body fat loss would be unlikely to lead to no weight loss. Unless it was over a long period of time with a significant increase in muscle mass (or manbe water retention somehow). I would recommend getting a more accurate estimate of body fat to verify the numbers. Body fat estimation is not exact and there are so many variables. (Hydration, where and how you gain/lose fat, etc.) And muscle is much denser than fat, so inches would certainly change.