Increases lung strength and endurance Train with our sportsgrade lung trainer to strengthen your lungs, improve overall endurance, and enhance sports performance with a challenging workout. Improves breathing efficiency Helps expand and develop lung capacity, improving breathing efficiency without requiring excessive aerobic exercise. Portable and convenient Compact, portable design with a small footprint that you can carry anywhere to train your breathing strength on the go. Flexible intensity for progressive training An adjustable intensity knob lets you increase workout difficulty to match your needs, enabling precise control and efficient progression to boost endurance. Key attributes Function: strengthens lungs, expands capacity, and improves breathing efficiency for better athletic performance. Size: compact and portable for easy transport and onthego training. Material/Construction: sportsgrade design for durability and reliable performance. Performance features: adjustable intensity knob for scalable resistance and progressive training. Use scenarios Preworkout warmup: use before training to activate breathing muscles and support better performance during activity. Travel or onthego training: convenient for days at the gym, on the road, or between sessions when access to equipment is limited. Endurance development: incorporate into regular training to gradually increase lung capacity and breathing strength over time.