About the productDescription·[Adjustable Professional Training]:Inspired by professional athletic breathing techniques, this breathing trainer features ultra-soft ABS silicone and a rotating valve resistance system, providing comprehensive respiratory training for fitness enthusiasts.·[Elite Training Equipment]:Perform 10-15 breath cycles per set, completing 2-4 sets daily. Adjust resistance intensity through left/right rotation to strengthen respiratory muscles and abs, enhancing breathing endurance.·[Enhanced Endurance]:The lung trainer enables various oral muscle exercises, expands diaphragm capacity, improves exercise performance, and boosts training quality and efficiency.·[Compact & Portable]:With its small size, lightweight design, and ergonomic structure, this device ensures comfortable and convenient use, delivering optimal training results.·[Full-Scenario Application]:An essential strengthening tool for athletes, suitable for fitness training, swimming, track and field, running, cycling, and outdoor activities, providing safe and effective muscle conditioning. Product description