Owen worked as a caretaker for some bars in England and lives in Mitcham Surrey, Known as 'Mini Arnie' after his hero Arnold Schwarzenegger.
Jason said: 'Pound for pound I'm one of the strongest guys at the gym.
'Occasionally I do get grief for being a dwarf when I'm working the doors.
'I don't let it get to me and often by the end of the night I have them over my shoulder when I chuck them out.
'People are always surprised by my strength.'
He eats 4,000 calories a day in protein-rich food and power shakes to build up his muscles.
Jason is now in training for the Kent Klassic bodybuilding competition in Gravesend in August.
He said: 'I haven't won a competition yet but this summer I'm hoping to get in shape and bring home a trophy.