Britney Spears' boyfriend Sam Asghari says she "is a natural born athlete" and that the couple love to share videos of them working out online because, "it looks great on camera, but the moves are much harder in person than they look." Asghari, himself a fitness trainer, tells E! News that he and Spears "work out a lot together. We run, we do a lot of yoga, we really challenge ourselves to do different types of exercises," Sam said, adding, "A lot of the yoga moves that she does I just can't do." Ashghari told the outlet that he just launched his own fitness program at AsghariFitness.com, which he says "is designed for anyone, people who have an hour or even 30 minutes to get a workout in," adding that "the program will keep track of what you're doing in your personal profile. Most of the moves are centered around body weight, so you can do most of them anywhere."