HEY THERE, MEN'S Health MVP member. We're so happy you're here. Not to toot our own horn, but we think our 12-week plan to build badass arms is pretty, well, badass. Your coach, Dan Trink. C.S.C.S., is a strength coach, personal trainer, nutritional consultant, and founder of Fortitude Strength Club in New York City. He created a program that blends isolated arm exercises and compound upper-body movements to help grow your biceps, triceps, and shoulders. "A bigger muscle can produce more force. A stronger muscle allows you to work with more weight, which, in turn, builds a bigger muscle," Trink explains. "The key is to hit a balance between training for strength and training for size, whether it’s in a short program like this or in years-long training cycles." Of course, Trink also mixed in some lower-body moves like squats, dead lifts, and leg presses.…