I'm in the UK and swim in a 25 metre pool it's saying I'm doing 40 lengths were in fact I'm only doing 20 please can someone advise? may thanks
I'm in the UK and swim in a 25 metre pool it's saying I'm doing 40 lengths were in fact I'm only doing 20 please can someone advise? may thanks
Try whether the tips in the FAQ can help improving the accuracy:
Tips to Improve Accuracy of Pool Swim Activities | Garmin Customer Support