I have had 2 lows already today (around 4)!!! I went to the gym last night at 5, had good BGs all evening and this morning then stupidly did my normal dose at breakfast instead of reduce it a bit this morning. I need less insulin especially around 12/15 hours after the gym. Not been for 3 weeks so kinda forgot as got out of routine oops!
Takes a while to understand what your body will do, so just carry some tabs, make a note then try different things out next time you go.
paul