Hatha: This is a very popular variety of yoga, and one that has been commonly taught for years. Focusing on perfecting the mind by way of perfecting the body, many asanas, breathing techniques, and meditations are used.

Ashtanga: This is another popular type, and is considerably faster paced than the other schools. It could almost be considered a type of aerobic yoga, with quick, smooth transitions between poses.

Kundalini: This school is focused on awakening and focusing what is known as kundalini energy. Kundalini energy is most easily compared to life energy that lies dormant in our bodies. It is commonly represented by a coiled snake.

Mantra: This school is focused on calming the mind and body through the usage of words and sounds. The well known 'Om' is commonly heard in this school.

Tantra: This school is well known by way of its focus on sexual spirituality. They also focus on kundalini energy, although their intent for awakening it is much different from the Kundalini practice.

No one is entirely sure when or where the practice of yoga was started. It's commonly believed to have originated in India. The Yoga Sutra by Patanjali, a 2,000 year old work, is the first written mention of the practice. Previous to this, it was an oral tradition passed from person to person. Yoga is a very diverse practice, no matter which school you choose. People young and old can gain many benefits from regular yoga practices, and asanas can be adjusted to fit physical limitations and other complications.