Table 1.

Description of Each Objective and the Comparisons Tested

Objective	Group Comparisons	Outcome	Expected Result
Influence of the Fitbit…
On actual PA as reported in the e-diary	e-diary-only vs. e-diary+accelerometer	METS as reported via the e-diary	Greater average MET score in combined than in e-diary- only group.
On perceived total PA	Accelerometer-only vs. control	Perceived total PA (total METs from the IPAQ)	More perceived total PA in the Accelerometer-only group compared to control.
On perceived number of discrete exercise sessions	Accelerometer-only vs. control	Number of perceived discrete exercise sessions	No difference between groups
Influence of the e-diary…
On actual PA as measured by the accelerometer	accelerometer-only vs. e-diary+accelerometer	Average steps per day of study as measured via Fitbit	Greater average accelerometer steps in e-diary+accelerometer than in accelerometer-only group.
On perceived total PA	e-diary-only vs. control	Perceived total PA (total METs from the IPAQ)	More perceived total PA in the e-diary-only group compared to control.
On perceived number of discrete exercise sessions	e-diary-only vs. control	Number of perceived discrete exercise sessions	No difference between groups
Influence of each device on exercise intensity
Influence of each device on perceived mild, moderate, and vigorous PA	e-diary-only or accelerometer-only vs. control	Perceived mild, moderate, or vigorous PA (METS from the IPAQ)	More perceived mild, moderate, and vigorous PA in the e-diary-only and accelerometer-only groups compared to control.