Some people finish a marathon, or climb Mt. Whitney, or get down to a certain weight, and that's it.
That's their finish line.
They view that particular challenge as a sort of bucket-list accomplishment, and when they cross that finish line, they all but cross out fitness as a priority in their lives.
They stop doing the things that helped them attain their goal and revert to poor habits. Soon enough, they're out of shape again (or have gained back all the weight).
That’s why, when I reach the finish line of a marathon, I’m ready to sign up for a future race or races, perhaps as far as a year down the...