Enhance endurance: Regular use of this lung trainer can improve sports performance, challenge your limits, and progressively increase the effectiveness of your training. Expand lung capacity: Designed to expand lung capacity over time, with progressive benefits that do not rely on extensive aerobic exercise or calorie expenditure. Portable and compact: Small yet powerful, this device allows you to train anytime, anywhere, helping you stay ahead of the competition and achieve your goals. Progressive resistance: The adjustable intensity knob lets you set the difficulty to match your needs, enabling gradual strength gains for athletes. Use scenarios: Preworkout breathing warmup for runners, cyclists, and teamsport athletes to prime the lungs before training. Travel or busy days: a compact, onthego solution for quick breathing training during flights, hotel stays, or breaks at work. Offseason or recovery days: maintain and gradually improve lung capacity without relying on long cardio sessions.