Build N Box located in the Bronx is a place to tone, build and condition your body. Youll be strengthening your mind and boosting your confidence. BNB offers a family atmosphere, state-of-the-art training equipment and a team of professionals whom truly care! Whether we’re working with children, teens, or adults, we strive for the highest levels of service. Our fitness instructors and trainers have years of experience, and they truly connect with our clients. They’re passionate, and they’re warm and friendly.