The "Badlapur" actor took to photo-sharing website Instagram to share the video in which he is seen working out with a fitness trainer.
Sporting a black vest, Varun is seen reclining on a bench and lifting the 'very heavy dumbells'.
The 28-year-old captioned the video, which he shared on Friday,: "#tbt #abcd2 workout".
For "ABCD 2", Varun had to do extensive rehearsals to get into his charater Suresh's mode of dancing.
Directed by Remo D'Souza "ABCD 2" is a sequel to 2013 dance-based 3D film "ABCD - AnyBody Can Dance" and also features Shraddha Kapoor, choreographer-director Prabhudheva and international dancer Lauren Gottlieb.
It is slated to release on June 19.