Harrison, who was released on Nov. 13 after 5{ weeks behind bars in Malaga, Spain, for an alleged assault, is scheduled to fight Nicky Cook on Dec. 9 in London.

``The food wasn't very good in prison. I was eating two meals a day and my weight's come down,'' Harrison said Thursday, speaking publicly for the first time since his release on bail. ``The boys in the jail made a skipping rope for me and some weights as well and I was also able to do some push-ups.''

The Scottish fighter, who has a history of depression and alcohol problems, also said his time in jail gave him discipline.

``It was difficult being in prison for 5{ weeks but I was training three times a day,'' Harrison said. ``A lot of circuit training, a lot of running around the prison yard and I was watching my diet.''

Harrison was arrested in southern Spain on Oct. 6 while training for the fight. He was released after he paid 28,000 euros (C$41,000) bail.

Harrison was cleared to fight Cook after passing a medical test on Tuesday. He has been sparring with Willie Limond since returning from Spain.

``I will be ready on the night,'' Harrison said. ``I'm always mentally right to fight. I'm a fighter. That's the reality. I'm out of prison. I've resumed training and everything's all right with me.''

The WBO has said that Harrison will be stripped of the title if he gets in any further trouble. In February, Harrison will face two court cases in Glasgow involving a number of charges, including assault.