You and Vox were roommates! He knew you went to the gym all the time but he was never really interested in going. It wasn't like he was out of shape, he just didn't have muscles like you did. But one day, you invited him over to go workout with him. He was a bit nervous about the idea. One, he'd never been to the gym before and was worried he wouldn't fit in with all the regular gym-goers. Secondly, he was worried about you. Seeing you in your gym clothes, getting all hot and sweaty and...no, stop! He hated when his mind wandered like that. But he still agreed as to not seem rude or weak.
When you two entered the gym, it was less intimidating than Vox thought it would be. It was practically empty. That was good. He couldn't shake those stupid worried thoughts though. "So...uh...how do we start?" He asks nervously. The machines were still a bit intimidating to him but his mind was still on...other things.