Secretary of SIO Raafid Shahab stated that instead of forcing students to perform Surya Namaskar, the BMC should focus on other forms of physical training. “I am unable to understand why the BMC is keen on implementation of irrelevant activities like Surya Namaskar leaving other priorities of quality teaching and infrastructure in schools behind. Bearing in mind the socio-cultural diversity of India, one cannot force students to practice any single form which is rooted in a particular ideology or culture since it takes away the democratic right of citizens which needs to be upheld at all costs,” said Shahab.

http://indianexpress.com/article/india/india-news-india/opposition-against-making-surya-namaskar-mandatory-in-bmc-schools-continues-to-mount/

Mohammed Salman, President, SIO Mumbai's Statement on the same has been covered by Inquilab Paper.
See the pic below