Table 1.

Experimental Participants’ Comments Regarding Polar M400 Features.

	Comments
Positive Features	“Exercise Bar” on main screen that “filled up” as participant completed progressively more PA toward daily goal. The physical inactivity reminder which made smartwatch vibrate after 45 min of inactivity. The “Diary” function of the smartwatch that allowed for the participant to review all PA completed over the last 30 days. Capability of smartwatch to track multiple PA modalities.
Negative Features	Poor smartwatch to smartphone syncing. Size of the watch was often “too big”. Did not possess built in heart rate monitor. Global positioning system sometimes poor for outdoor activities.

Note: At least five participants had to provide approximately the same comment prior to inclusion of a comment in this table.