Thanks but it doesn't, I want a watch to keep track of my swimming training, I'm afraid using USB connectors would make the watch less waterproof.

They tend not to put standard USB in the watch, but connections like this: https://media.dcrainmaker.com/images/2014/06/IMG_3109_thumb....

Nice, I didn't know that, thanks for telling me!

A good chunk of their watches are designed for triathalons, and if im not mistaken pretty much all use the same (proprietary) usb.

They are all perfectly waterproof. (Current owner of a forerunner 945)

I use a vivoactive 3: it has combination usb/charging port[1] that's completely waterproof and designed to be used while swimming. I believe most garmin watches share the same port design.

[1] https://www8.garmin.com/manuals/webhelp/vivoactive3/Shared/G...

I wasn't aware of that, thanks for telling me!

try the garmin swim 2. I gave one to a coworker to try and he was really frustrated that he couldn't break it. it just kept on going, counting his strokes and all. He tried several different wearables (cheap to expensive) and he said, nothing could come close to the swim 2