March 17, 2016 | Consumer activity trackers are inexpensive, user friendly, and reasonably accurate, so it's not surprising that as their public profile has grown, so have the number of researchers using them in clinical trials. We did a search of ClinicalTrials.gov for "Fitbit" -- just one of the activity trackers out there, but one of the most popular and high profile -- and found a surprising number of in-progress trials.  MobiHealthNews