LONGHAO Lung Trainer Sport,Breathing Exercise Device,Iron Trainer,Breathing Device,for Hypoxia Respiratory (Black)

High QualIty Materials:This pulmonary trainer breathing trainer is made of high quality food grade silicone aps material, which is safe, non-toxic and durable. It can help you improve your breathing capacity and control performance and help you train and maintain your endurance Changeable Resistance:Using the deep breathing lung exercise tool, you can find the right level of resistance for your workout and adjust it accordingly because it has adjustable resistance. The use of respiratory trainers can improve the strength and endurance of the respiratory muscles. Fatigue of the respiratory muscles is a limiting factor in training Daily use: breathing lung trainer can effectively improve lung function and prevent respiratory diseases. Exhale slowly through your mouth until you are almost completely out of breath. Then repeat the above exercise 10 to 15 times to complete the setup. Do 2 to 4 sets per day Improve endurance: This lung gymnastic improves breathability and durability in case of shortness of breath, and provides 100% adjustable resistance during inhalation and exhalation. Lightweight and compact, you can take it anywhere. Can be used by almost everyone without side effects Wide range of uses: The deep breathing lung trainer is small in size and easy to carry. Can be used for adults, seniors, children, swimmers, athletes, singers, etc. Breathing trainer can improve breathing power and control performance, increase anaerobic threshold and expand your limits. Suitable for swimming, diving, surfing, running, fitness, tourism and other occasions