I mean, that's traditionally thought of as the road to failure. 90% of people who do that, or 90% of things you try using that approach, will fail. You'll go to the gym 4 times, and then get too busy to go. And then never go.
I think you have to force yourself to go for the first month or two. Set a goal. Lift X pounds. Run X miles. And try every day to reach that.
At least until it becomes a habit, and you get to the point where you miss not going to the gym.
Good post though, and worth thinking about.