Surveys show that as of September 2013, one in 10 American adults wore a fitness tracker. Los Angeles-based trainer Shirley Archer More Quotes by Los Angeles-based trainer Shirley Archer More Quotes From Los Angeles-based trainer Shirley Archer Imagine if your doctor had access to your heart rate information over the last 60 days and could see when a change occurred? that's why all these trackers are meaningful in the long run. Los Angeles-based trainer Shirley Archer health-news
