Question

Which device would help someone train for a marathon?

Drone
Navigation system
Smart watch
VR headset

Answer 1

I think Smart watches will be good as it will track your breathing, heartbeat, and steps. VR head set will not make you go so far, drones can look at the track you are running but it is not helping you run, and i don’t know about navigation systems.

Answer 2

i think a smart watch because it can help track you steps and it can tell you how many calories and fat you burn.
i hope this is correct and i hope it helps