When people become anxious or stressed, their breathing tends to quicken and become more shallow, which can lead to hyperventilation. However, if you practice deep, slow breaths and take breaks often, you can easily hold your breath for two minutes or more. In addition, snorkeling can help to increase the amount of oxygen that is absorbed by the body, which is beneficial for overall health. Therefore, it can be said that snorkeling is good for the lungs in multiple ways.