How do you start out as a tennis prodigy, and then end up training celebrities like David and Victoria Beckham and Karlie Kloss, (that’s just to name a few)? Well, 45 hours a week of working out is a good place to start. Akin Akman gives us the latest on fitness, and how to look like a star. Akin Akman, the founder of AARMY, doesn’t have to recruit fitness soldiers. He has already has amassed nearly two million fitness-enthusiast followers on Instagram. And, if the packed classes at the AARMY studios in New York City are any indication, his army is looking pretty strong. At AARMY, in NoHo, Chelsea, and online, attendees participate in high-intensity bootcamp and/or cycling workouts. During classes, there’s an underlying sense of community and support. Classmates high-five each other, clap to acknowledge their neighbors, and keep the spirits positive. Akman started gaining his community of dedicated fitness warriors while leading sold-out classes as an instructor at SoulCycle in New York City, and in the 10-plus years since, his brigade has become global. As summer is upon us, we asked Akman what his plans are, how he stays in shape during the sunniest season and where he’s…