From what I remember about it:

• 1980-2000
• man saves woman from getting robbed at an ATM
• man gets recruited by wrestling/ultimate fighting organization
• man refuses mind-control steroids
• father of saved woman tells man he can date daughter if he can hit him in a fight
• man can not hit saved woman's father
• father of saved woman trains man in martial art
• one of the organization's fighters goes on 'roid rage
• man learns fighting organization is underground gang dealing in drugs, guns, and money
• man learns to move cans and explode watermelons with chi
• man brings down organization