to suspect that if the stupid scales at the gym

[Alameda]

. . . get my height wrong, their assessment of my weight and body fat % is also inaccurate?

Yes probably so, I used the ones in boots the once, and they reckoned that I was over 6 foot!

I'm actually 5 foot 5. Can't get it that wrong when all you do is stand on it, I didn't exactly tiptoe, just stood up straight! :o