Hatha yoga, or, as it is commonly called in the US, simply “yoga,” is an exercise system derived from ancient traditions in India. There are many schools or varieties of hatha yoga, but all of them involve “asanas,” or postures. Many asanas function as gentle stretching exercises, increasing flexibility. Others encourage the development of strength and balance.

The practice of hatha yoga goes beyond exercise, however. Special breathing techniques are almost always part of the process; in fact, some forms of yoga focus primarily on breathing, and therefore overlap with traditional breathing practices generally known as pranayama. Because hatha yoga originated in traditional Hindu spiritual practice, it can involve meditation, chanting, as well as philosophical and religious introspection. However, completely secular versions of hatha yoga are widely available.

Hatha yoga is believed by its practitioners to provide benefits above and beyond simple exercise. For example, certain asanas are said to address specific health problems. However, there is only minimal scientific evidence that the practice of hatha yoga actually provides any well-defined medical benefits.

There are numerous specific schools of hatha yoga, including Iyengar yoga, Ashtanga yoga, Kriya yoga, Vini yoga, and Bikram yoga, as well as “generic” hatha yoga. Yoga is ordinarily learned through inexpensive group lessons, but regular at-home practice is necessary to progress in skill (and to derive potential health benefits). Lessons are commonly available at hospital wellness centers, health clubs, city recreation departments, and private yoga studios. There are also a wealth of do-it-yourself yoga DVDs and books, but most serious yoga practitioners caution against learning the technique without an instructor present.