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Newbie here and sorry if this gets asked a lot!
I'm training for three marathons this year and am thinking of getting a watch to improve my times.
I understand that most of the watches store lap times but I'm not sure how it knows how long a lap is. Do I need GPS for the watch to know I want a lap to be a mile?
Ideally I want the watch to tell me how many miles I've run, how long the last mile took and what my average speed per mile is.
I'd also like multiple alarms so I can programme around five alarms per day as I'm diabetic and the alarms will remind me to check by blood sugar levels.
Any advice much appreciated!