Suddenly writing code cleanly becomes a very lazy thing to do, it reduces the amount of effort you have to invest in a program over the program's lifespan, unless its a throwaway and then ugly stuff makes sense.
Working out isn't a lazy thing, it is easier to climb a flight of stairs than to train 6 hours a week for a year and climb a flight of stairs. It increases the efforts you invest in things, it might be a goal to be healthy and energetic but then the lazy thing to do is to try to hack your training schedule and get the most benefit out of every drop of sweat.