Improve Your Endurance: Breathing Exercise for Lungs is helpful to improve your breath, helps you get better endurance, and makes you feel better day by day. Functional and Effective: Lung Exerciser Device strengthens your lung capacity and helps you adjust the abdominal muscles, therefore allowing you to exercise core muscles. Adjustable Resistances: Deep Breathing Lung Exerciser is designed with adjustable resistances, allowing you to find the right resistances level for your training and adjust accordingly. Improve Body Performance: Breathing Trainer for Lungs can help you build up your breathing and abdominal muscles, therefore enhancing your overall performance. Lung Capacity Improvement: Lung Endurance Trainer is helpful to decrease the accumulation caused by body waste, helping you greatly increase your lung capacity.