Body fat percentage

[RhiChiChi]

Based on what MD said, then I would say beforehand. You may sweat more/less or drink more/less during every workout

[Rouge]

I was just about to say it depends on how hydrated you are... yes I'd be more concerned that he didn't know that too.

[appletree]

Aaahhh, so that explains it! I just had another check and we did it after i had already done a session at the gym and it was nothing like the first reading i had done! I decided to just ignore it and concentrate on other measures.