11-14-2016 16:43
11-14-2016 16:43
11-15-2016 03:40
11-15-2016 03:40
Hello @ActiveInAK, welcome!, it's nice to have you on board the Fitbit Community.
It's possible to add multiple devices in the iOS app, either another Fitbit tracker or MobileTrack which uses your phone's sensors to track basic activity data including steps, distance, and calories burned.
To get MobileTrack:
Additionally, another option would be manually log in your treadmill activity on the online Dashboard, this will add a step count based on the duration of the exercise, the distance traveled and your personal settings.
I hope this information can be useful, keep me posted if you need anything else!