Some people think of yoga as a stretching or fitness class, but yoga is more than a series of poses or asanas. The Yoga Sutras of Patanjali talks about the eight limbs of yoga: yamas (abstinence), niyamasa (observance),  asanas (posture), pranayama (breath control), pratyahara (sense withdrawal), dharana (concentration), dhyana (meditation), and samadhi (contemplation). 

These eight segments of yoga bring together the movement of the body (posture), with fluctuations of the mind (sense withdrawal, concentration, and meditation), and breathing techniques, along with guidelines to living a virtuous life (abstinence, observance, contemplation).  The connection of the mind, body, breath and spirit helps direct our attention inward.  By focusing our attention inward, we learn to recognize our habits and thoughts without judging them, or trying to change them. We become more aware of our experiences and live more in the present moment. The awareness that we cultivate is what makes yoga a practice, rather than an exercise.

To learn more about the Yoga Sutras, you can read some articles online at YogaJournal.com, or you can buy one of the translations of this ancient text from Amazon.com.  I like “The Yoga Sutras of Patanjali” translation by Sri Swami Satchidanana.