LUNG EXERCISE DEVICE PROFESSIONAL TRAINER Increase respiratory strength: Increase respiratory strength and control performance. Train your anaerobic expansion and push your limits. Increase your oxygen intake and maintain endurance. Easy to do: Inhale slowly and as deeply as possible through your mouth and hold your breath for a few seconds. Exhale slowly through your mouth until you almost completely lose your breath. Then repeat the above exercise 10 to 15 times to complete the series. Do 2 to 4 sets per day. Portable device: The lung breathing trainer is very small and portable. With this device, you can perform your workout routine wherever you go. Wide range of applications: suitable for overhead training, swimming support training, running training, etc. It can be used for adults, the elderly, children, swimmers, athletes, singers, etc. Improve endurance: Using a breathing trainer can improve the strength and endurance of the respiratory muscles, breathing muscle fatigue is a limiting factor in exercise, strengthening the respiratory muscles can improve the limits of exercise. Lung capacity: It helps to expand and improve lung capacity without the danger of doing a lot of cardio and burning calories. Specification: Item Type: Breathing Exercise Device Material: silicone, ABS Colour:Black and white How to use: Insert the mouthpiece into your mouth, bite the inside of your mouth and fix it in the correct position of your throat and tongue. Breathe in and out during adjustment The resistance valve selects the level of breathing resistance they have (make it challenging, but not uncomfortable). Turn the valve left for more resistance (), and right for less resistance (-). List of packages: 1 x breathing exercise device