Portable lung capacity trainer, fitness running swimming abdominal breathing exercise device to help lung movement expand and restore lung capacity improving trainer - black
[Improve exercise efficiency] : Enhance aerobic exercise endurance and increase lung capacity, enhance muscle endurance, resistance can be adjusted by circulation valve, portable and easy to clean
[High quality material] High quality silicone mouthparts, no odor, harmless for long-term use
To improve the efficiency of aerobic resistance training, a certain amount of resistance is applied during exhalation to avoid or reduce the early closure of the affected small airways and reduce the volume of residual air in the lungs
Portable lung capacity trainer, fitness running swimming abdominal breathing exercise device to help lung movement expand and restore lung capacity improving trainer - black