Stephen King - Stationary Bike

Visiting the doctor, an artist is told that his cholesterol count is above normal. The doctor uses the metaphor of men working on a road, and they cannot keep up The man will not live long should he continue on his current trajectory. To combat his weight problem, he buys an exercise bike, and start riding. It however turns into an obsession, which he discovers, put the fictional workmen out of a job; and they want to take revenge on him.

A brilliant descriptive story, especially the way the doctor explained the men at work.