Since stretching occurs within the context of alignment and strength, flexibility is not the primary requirement for practicing yoga, nor its main measure of success. The Iyengar system develops flexibility and relaxation in conjunction with isometric activation of muscle groups which allows for balanced extension. These actions, as well as supporting the weight of the body are effective ways of building strength. Yoga is also therapeutic. Bringing balance to the musculoskeletal system not only helps structural problems, but also nourishes, tones, and detoxifies the entire body.

Yoga is chiefly concerned with relaxation and does not provide a good workout.

The principles of alignment learned in yoga postures are universal and can be translated into a better understanding of movement in sports or daily activities. Yoga can, in fact, counteract imbalances brought about by other types of exercise. Often athletes who consider themselves to be in good shape are quite challenged by Iyengar yogas emphasis upon balance in the muscle groups and deep internal strength.

Yoga aims at a passive, trance-like mental state

The attentive effort necessary for correct technique absorbs the mind and quiets distracting thoughts. There is total participation of both body and mind in the present moment.

Because Iyengar yoga focuses on the physical, it is not meditative.