In order to bulk up he has had to increase muscle weight in his body for which he has been consuming foods rich in proteins. Therefore he has been on a high protein diet. He includes fish in most of his meals. He makes it a point to eat protein rich food. In fact, Sidharth does not leave home without his protein bars. They are an important part of his diet.
He keeps a strict check on what he consumes every day. The actor has been training very hard to get into the skin of a professional wrestler. He has been working out and is undergoing extensive training to build muscle. He has already put on 8-9 kilos.
Sidharth is very dedicated and has been very strict with himself. He is leaving no stone unturned and thoroughly preparing himself for his role.