【Balance Trainer】 Add this to your workout and you're guaranteed to have a challenging workout. It can be used for core training, balance, full-body strengthening, flexibility, cardio, and more. It can be used for core training, balance, full-body strengthening, flexibility, cardio, and more. With its reversible design, you can change the level of balance intensity and mix up your routine to increase motivation. You can purchase TRNR Strength Tube X (from 3.4kg to 22.7kg), Strength Bar X, and Strength Handle X to further increase your upper body-targeted exercises.