Two years since its initial launch, the Apple Watch has shifted its focus “from a stylish jack-of-all-trades fashion accessory to a personal trainer” with a new emphasis on sports and fitness, explains The Wall Street Journal. The Apple Watch Series 2, announced last week, is water resistant to 50 meters and features a heart rate sensor and a fitness app with 12 workouts. A new partnership with Nike offers “sports-themed watches along with GPS capability that helps the device track hikes, runs and bicycle rides,” notes WSJ. The Apple Watch Nike+ model includes the Nike running app and offers Nike-inspired faces and bands.