They strip bare the religious overtones of yoga and do not attach any dogma or religion to it. It becomes a free for all. It is important to learn yoga from a skilled instructor. Do not try this at home by yourself as some postures are more difficult than they appear. Those with high blood pressure or other medical problems should seek the advice of their doctor before doing yoga.
Yoga is a holistic approach with a grand ontological view.
It is unsurpassed in its knowledge of sensory perception of our organs. Yoga covers everything, from psychology to health and ethics. The way has been paved and fine tuned by ancient yogis, sages, saints and tantrikas for thousands of years.