LungFit Pro: Portable Respiratory Trainer

It's soft and elastic, it's designed to fit in your mouth, and it's easy to clean. After the mouth bite, is to do breathing and exhaling exercise, it can help me slowly adjust the breathing rhythm, improve the lung capacity, feel very practical. The trainer is small and easy to carry around. I took it out when I ran today, and it felt good to use it. People who don't run often will gasp for breath when they run for a while, and then they feel very tired. Using this can help them adjust their breathing in a rhythm. Now I just started to exercise, the resistance strength is not large, and I will slowly increase it in the later period.