The `Hangover 2` actor - who was recently voted the Sexiest Man in Hollywood - explained he didn`t seek professional help because of a personal "crisis", but thought it would help him to "grow as a person".
He explained: "Oh, God, I love therapy.
"It was not really a crisis I went in with, just getting turned on to that aspect of wanting to grow as a person. I thought it was fantastic."
Bradley - who has formerly dated the likes of Renee Zellweger and was recently linked to `Avatar` actress Zoe Saldana - admitted having to survive on a strict diet and exercise regime for his role in `The A-Team` was a "crazy" experience, and while he found the results aesthetically pleasing, it is not something he could commit to long-term.
He added in an interview with Celebs On Sunday magazine: "I had a crazy training programme. From an aesthetic point of view, yeah, it was unbelievable, but not from a lifestyle point of view.
"Halfway through the film, from the scene where I don`t appear, I basically started eating pizza and ice cream."