Those who are trying to get fit and stay in shape by downloading Under Armour's health- and fitness-tracking app, MyFitnessPal, are now in danger of having their information stolen.
Under Armour says roughly 150 million MyFitnessPal users are affected by the breach, which it discovered earlier this week. It said that an "unauthorized party" acquired data about these users late last month.
Under Armour says they gained information like usernames and email addresses, but not payment details.