Los Angeles - Channing Tatum says wrestling is one of the "most painful" things he's ever done.
The 34-year-old actor stars as Olympic medal-winning wrestler Mark Schultz in the film Foxcatcher - which is based on real life events - and while he enjoyed learning the sport, he has no plans to carry on doing it.
He said: "Wrestling is one of the most painful things I've ever done. I've played many sports but none like this. It's the only sport I know where you have no down time, no time to pull away and rest.
"Even in boxing, you can back away and dance around a bit, but in wrestling you're locked in combat with the other guy the whole time, and that's it, It was an amazing discipline to learn, but I do not need to do it ever again."
The 21 Jump Street star - who turned down the role in Foxcatcher when he was first offered it because he felt he hadn't grown up enough to understand the psychological thriller - also admitted his love of sport has led to him becoming a very competitive person.
Quizzed on how competitive he is, he told Britain's HELLO! magazine: "Very, very competitive. I wish I could say I've evolved into the sort of person who's a good loser, but I'm not.
"I'm the kid who is not happy at all if our team loses, and I'll go to pretty much any length to win. I get that from my dad."
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