Actor Russell Crowe is undergoing a gruelling training schedule for his role in the film "Man of Steel".

The 47-year-old actor plays Superman's father, Jor-El, in the upcoming movie and has been opting for gym sessions, long bike rides, runs and walks so that he is fit for the part.

"Yesterday 1 hr walk 1 hr gym, today pitiful bike ride but it is a very special day and i've got other things I need to do. go hard tomorrow (sic)," he wrote on microblogging site Twitter.

"31.37 km bike ride. Bike 28.6 km, gym 1 hr. 2 walks, total time 1 hr 45 mins," he further posted.

The Oscar winner even shed 16 lbs (around 7.25 kg) on a tough new exercise and diet regime, which involved following a gluten free eating plan and a punishing fitness schedule, reports

He tweeted: "220 lbs this morning, started at 236.4 lbs. 45 min walk, 12 mins eliptical, weighted objects 40 mins, walk 25 mins. 2400 cal a day maximum, all meals & all beverages. Where possible gluten free.

"Day 12 of a 105 day training period, there is a long way to go, one layer of tissue paper per day of effort and diet ... it takes a long time (sic)."