Katrina Kaif is tired of roles that only require her to look pretty. She is ready for more, having recently done action sequences in the upcoming movie ‘Ek Tha Tiger’, apart from shaping up to do a full-fledged action role in ‘Dhoom 3’, where she plays a gymnast. Actresses performing stunts is not a new phenomenon. Aishwarya Rai Bachchan has done some stunt scenes in ‘Dhoom 2’ and ‘Jodhaa Akbar’, Priyanka Chopra had some action scenes in ‘Drona’, ‘Don’ and ‘Don 2’, while Kareena Kapoor has thrown her share of kicks and punches in ‘Agent Vinod’. Action as a genre is translating into hit films these days, and almost every actor worth his six packs will be seen in an action film this year, including Salman Khan (‘Ek Tha Tiger’), Akshay Kumar (‘Rowdy Rathore’), Ajay Devgn (‘Tezz’) and Hrithik Roshan (‘Krrish 3’). Actresses don’t want to be left behind, and are now leaping off buildings and indulging in car chases as well. Kat is so serious about getting it right that she is seeking help from an international fitness instructor to help her train for ‘Dhoom 3’. The trainer is presently with her in London, where she is shooting for her film with Shah Rukh Khan. She trains for two hours everyday to strengthen her core muscles and increase stamina and agility. She will be training with him for four months, post which the film goes on floors.