Newcomer Ridhima Sud, who features in Zoya Akhtar's upcoming film 'Dil Dhadakne Do', realised how serious her co-star Ranveer Singh is about gymming in the right gear.

During the shoot, he apparently once saw her on the treadmill, but wearing shoes that were not right for jogging.

He told her, "You are using the wrong shoes for the gym, nothing good will happen, but you may twist your ankle."