Apple today updated its Apple Store app, replacing the previously available Holiday Playlist with a new free app, the 7 Minute Workout Challenge. Seven minute workouts gained popularity in 2013 as a quick way to complete a rigorous workout, and 7 Minute Workout Challenge is one of the more popular fitness apps in the category, with a 4.5 star rating and a $1.99 price tag. The app includes a random selection of 12 different exercises that are each performed for 30 seconds with 10 second rest intervals in between. According to research, this seven minute workout is the equivalent of working out for more than an
