There are going to be barriers because of the level of literacy and language, the ability of the people who are the end users to be able to use the device in a positive fashion.
Because you're also having to consider broadband width, is there a connectivity issue? Then if something goes wrong, they don't have an IT department that they can just run over to and get help to fix a problem.
On the whole idea regarding activity, I encourage my colleagues to go to a first nations community and try activity—10,000 steps on a reserve—and see how far you get before you get to 200.