Abdominal Breathing Trainer for Lung Capacity Lungs Exercise Endurance Equipment Breathing Exercise Portable Fitness Equipment

Feature: Breathing exercise equipment to challenge yourself for better exercise and improve overall endurance. Vital capacity - it helps to expand and improve vital capacity without the risk of having to do a lot of aerobic exercise and burning calories. The portable device - Adventure lung breathing training instrument is very compact. Easy to carry. The adjustable resistance dial makes the simplest task more difficult, and can exercise more intensely according to your needs.