River BK

About River River is Brooklyn’s first open-gym megareformer studio. In our coached sessions, you’ll move through full-body sequences on custom raftformers—machines built for strength, endurance, and precision. Controlled resistance meets faster “Rapids” intervals to build athletic power and sharpen control. Because of how the machine is designed, our raftformers unlock movements and muscle activation you won’t experience on any other megareformer workout. Every session blends slow, sustained, and fast movements so both your slow-twitch and fast-twitch muscle fibers are fully activated—unlike traditional gym training, which primarily targets fast-twitch fibers, or other pilates-based workouts, which emphasize slow-twitch endurance. This is a total-body experience that trains every layer of strength. Coaches guide every transition with precision and intensity, while curated playlists move seamlessly with your pace and energy. After completing the required number of group classes, you’ll unlock Free Flow—our self-guided format that gives you your own raftformer and the freedom to define your journey based on your specific goals outside of the class setting. A coach is always present for support, but how you move, focus, and progress is entirely your own. Disclaimer: All participants must sign a waiver before using the raftformers. The River App The River app keeps your studio experience seamless—from booking to tracking progress. ~Book and manage with ease – View live schedules, reserve your raftformer, join waitlists, and sign your waiver directly from your phone. ~Explore your flow – Read in-depth class descriptions, explore levels, and find the right challenge for your goals—whether you’re training in guided sessions or Free Flow. ~Unlock Free Flow – After reaching your class milestone, access self-directed sessions and choose when and how you train. ~Meet your coaches – Learn about their training backgrounds, philosophies, and specialties. ~Track memberships and packs – Purchase or renew class packs, monitor your credits, and manage your account in one place. ~Stay connected – Sync your classes to your calendar, receive reminders, and get updates on new offerings or events. The River app keeps you connected to your strength, your schedule, and your flow—wherever you are.