Wasn't quite as good at 235->190, but my program was about as simple: Eat and drink less, less meat in the mix, keep no snacks at home, a couple vegan days each week, and get on the bike more.
Of course this depends on where you find where the lines cross, for me: 40+ minutes a day on the bike means progress, anything less is maintenance at best.
So are plenty of other things that a keto diet restricts. Not saying I gave it up completely; just not eating a pound of New York strip at a meal with everything that goes with it. It's amazing how much less you want to eat when you start eating less.
Edit: Don't get me wrong, whatever gets the lard off one's ass is a good thing. Whatever works for you is what's important.
