When I went to the recently concluded 8th Hindu Spiritual & Service fair, Chennai, I found a stall by Silambalaya, a center for learning Tamil martial arts. It seems they teach silambam & varmakalai, both of which are ancient Tamil martial arts/combat forms.
According to their brochure, the training in these arts helps one to improve reflexes and coördination; learn self-defence; increase strength, flexibility, stamina, balance, concentration; reduce weight; instill self-confidence and self-discipline, reduce stress, etc.
It seems they are having 6-month and 1-year packages in which students can enroll. For further details, you could email: firstname.lastname@example.org or refer to their website.
This post is for your information, it is not a recommendation.