Healthy breathing is done through the nose, not the mouth. This cleanses and warms the air that comes into the body. If you take a moment to notice your body and your breath, you might notice that air comes in more easily through one nostril than the other. I always joke with my classes that people who do cocaine know this principle well! According to yoga philosophy, your dominant nostril will switch off every hour and a half if you are healthy. If one nostril stays dominant too long, that's not healthy. Anuloma Viloma causes both nostrils to breathe evenly; no one nostril is dominant. In this video, we do 4 rounds. For the full effect, you should do more than 4 rounds, but this is a good place to start. Try to breathe slowly, even if you breathe more slowly than I do in the video. Afterward, take a few slow, deep breaths through both nostrils to feel how neither one is dominant; that the body is in equilibrium. Build up to 10-20 rounds and you will notice an amazing feeling of vitality that this pranayama imparts.