This is not true, yoga is a calming practice and it works at strengthening the central nervous system and keeping it healthy. If you find that time is a factor for not pursuing yoga, and it is difficult for you to join a class, there are many yoga tapes available. Most of them require twenty to thirty minutes of your time a day. You could practice in the morning or before bedtime. This is a minimal amount of time to give to your body to ensure proper health and a calm state of mind.
Yoga is a positive benefit for people who suffer from anxiety.
It can teach you to relax and enhance inner peace. Mantra yoga focuses on chanting and can be a very spiritual practice. Power yoga is great for building stamina and strength. At any rate they all seem to provide similar benefits for your mind and body. The varieties of poses flow one into another, always breathing through the nose.