Hii,i am here to help you according to your query.Well,it is not an mandatory at all. Having certificates for participating in sports or other activities at a regional, state or national level will definitely get you some brownie points and tilt the panel in your favour but it is not absolutely necessary. There are a lot of candidates who have been selected even if they do not have any sports certificates. You need to be confident and more importantly, honest and sincere, during the panel interview. And of course, you MUST pass the medical check-up! No concessions allowed there.

Hope,this information helpful for you.Goodluck.