Movie Goodnight Mommy
http://www.imdb.com/title/tt3086442/
Was there a physical challenge to it?
It was quite a challenge physically. There was a lake which you can’t see in the film and I was running around that lake twice a day, like 10 kilometers every day. And then I called a boot camp and asked one of the trainers if he would train with me everyday in the morning from 6:00 in the morning to 8:00, outside. To be really, really fit and be able to be tied to a bed.
And how do you train for being tied to a bed?
[laughs] Well, you take care of your back muscles and your abs. You train a lot.