A review of running applications by researchers at U.K. cybersecurity firm Pen Test Partners found many of the popular apps did not improve over five years on security and privacy, TechCrunch reports. Researchers said the apps have not implemented basic security measures, like two-factor authentication, to protect health and fitness data. The Strava and Runkeeper apps are configured to share user data publicly by default, while Nike Run Club, Runtastic and MapMyRun share users’ training information with friends or followers.  
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