I have seen majorly in the western countries that people are focusing more only on doing asana practice. In many countries, yoga classes offer only asana practices in their complete time schedule. The reason of this is because most of the yoga practitioner & instructors are not aware of real meaning of Yoga.
Yoga is not mere doing asanas because asanas will only make us flexible through our physical body but they will not be able to touch the spiritual aspect of yoga. Asanas do open few nadis and circulate the pranas in the body but performing or practicing asanas is just a start for walking towards main aim of Yoga & that is Samadhi.
Yoga has 8 limbs
Working on all of these limbs means yoga. Yoga is the doorway towards awakening, to find the real self. When person reaches Samadhi, he merges with his or her point of focus and transcends the Self altogether. He comes to realize a profound connection to the Divine, an interconnectedness with all living things. With this realization comes the “peace that passeth all understanding”; the experience of bliss and being at one with the Universe.
I have met many people who are doing yoga (western style) from past many years but they were even unaware of eight limbs of yoga or even pranayama. For them, pranayama was only practice of breathing in and breathing out. But, from inside they were not happy because they were unable to touch the real essence of the soul.
By practicing only Asanas will not help one to attain the spiritual heights, Asanas can be mentioned as basic foundation for reaching the Samadhi but not complete yoga.
One has to start practicing Pranayama & Meditation regularly with Asanas to open the door for the awakening, else yoga for them will be the mere physical exercise for becoming flexible with physical body.
If you want to Learn Yoga at your place or wanted to take up online classes you can join : Online Yoga Classes