The 42-year-old 'MMA fighter hit out at his ex-wife's recent launch of a protein shake range, Katie Price Nutrition, and insisted she wasn't very interested in fitness when they were together.
He said: ''She wasn't interested, not really. She came (to the gym) a couple of times yeah.
''I just see it as a money-making opportunity, I don't think she is actually - it's anything to make a buck.''
Alex - who won 'Celebrity Big Brother' in 2010 - has now returned to his personal training roots and called his time in the celebrity spotlight the ''prostitute years''.
He told The Sun Online: ''The celebrity world doesn't really make me money - it might do for Katie, but it's a pretty crappy life having to sell your soul to make a living.
''I call it the prostitute years and now it's self-worth, I'm going back to what I love.
''All the celebrity crazy world aside, something I've always got and I can always stand by come rain and shine is my fitness career.
''I was a qualified personal trainer before I did all the celebrity stuff .
''I've had a lot of inner demons and battles the one thing that's kept me going through all of this is my training - it's the symbol that's held me together through the stress and pain.
''My tagline is health is the only wealth you need.''
Alex and Katie, 39 - who is now married to her third husband Kieran Hayler - split up in 2011 and he is now engaged to Nikki Manashe and trying for a baby.
He said: ''We are trying for a baby first.
''That's the plan. We want a baby first, before we get married.''
His new album Underneath It All is out now.
Gritty and involving, this small British thriller is like Memento crossed with The Bourne Identity...