[masraum]

I totally get it, Bill. I love to have/see data and measure things. I got the chest strap HRM last spring when I was running. Then I got an Apple watch which was great, because it had a HRM (which jives pretty closely to the strap and the treadmills at the gym) and GPS and my music.

I think the watches (we both have Apple watches) will be fine for most of our cycle training (which I'm assuming will be mostly 1-2 hours), but I'm not sure how they'll do battery-wise for 75-100 mile ride at what I'm assuming will be 14-16mph. I assume the GPS will run the batteries down pretty quickly. If we could get a full days ride out of them, then we could probably carry a spare battery to recharge them that night. I could disable things like wifi and bluetooth to extend the battery life, but I'm not sure if it would be enough.