Actor Purab Kohli says he now ends every workout with ab routine, thanks to his 'Rock On 2' co-star Arjun Rampal.

"Arjun has gotten me addicted to ab workouts. Whenever time permitted during our busy schedule in Meghalaya, we would hit the gym. Arjun carried some interesting equipment with him and he would let me have a go at it," Purab said in a statement.

The actor said that he follows Arjun's ab workout regularly.

"The first time we worked out together, he (Arjun) made me do close to 2000 crunches. I was in serious pain the next day, but now it's almost two months since and I end every workout with his ab routine," he said.

'Rock On 2', which also features actors Farhan Akhtar, Shraddha Kapoor and Prachi Desai, is a sequel to the 2008 hit film 'Rock On!!'.