2AM's Jo Kwon sure loves to show off his muscles. Jo Kwon's trainer uploaded a picture of his client lifting weights through his personal�Twitter. As the proud man owner of those muscles, Jo Kwon retweeted the picture so everyone would be able to see it. The trainer wrote, "Kwon is busy due to his new sitcom.. He comes to the gym whenever he can and exercises with a really tired face. He listens and does whatever Jinho hyung tells him to do but complains about it throughout the whole thing." Yup, sounds like Jo Kwon alright. [gallery] Source: Star News Photos: Jo Kwon's Twitter