Apple is reportedly using professional athletes to put its iWatch fitness features to the test in “intense training environments,” according to 9to5Mac. Athletes involved are said to include Los Angeles Lakers star Kobe Bryant, Dustin Brown of the Los Angeles Kings, and an unnamed Boston Red Sox player, among others. Bryant was notably spotted on Apple’s campus last month with his wife. It’s unknown whether the athletes were brought in only for testing the device, or if they’ll also be involved in iWatch marketing purposes. The most recent report on the iWatch claims the device will have more than 10 sensors, including health and fitness sensors.