Stig Åvall Severinsen said this quote
“ If only the physical aspects of hatha yoga are used, it is called ghatastha yoga (ghata means “physical effort”). Modern expressions like “fitness yoga” and “power yoga” that flourish within gym classes are within the same category, even if they do not derive from the original exercises’ rhythm and succession. In many instances “power yoga” has a positive effect on physical health; but if there is no aim to ease the mind, to gain self-insight and control of your thoughts, and to experience the divine within you and within the universe, the deeper meaning of yoga and - possibly life - is lost. ”