Steven's ninja training gym (Rock Solid Warrior) shared this, and I thought there may be others in the community who would find it useful. -------------------------------------------------- As ninja warriors, we put our hands through a lot—taking care of them is key. Check out our quick video—Coach Brett and Izabela walk you through proper hand care to keep your ninja strong and training! Daily & Post-Training Care - Keep calluses smooth by filing them down regularly to prevent tearing using an electric callus remover or pumice stone - Moisturize daily with a quality hand balm to avoid cracks - Skip heavy lotions right before training—they can soften skin too much - Wash hands after training to remove chalk and dirt that dry out skin