Person who has had a program hard wired into their daily routine

What is the best word to describe a person that has done the same thing contractually for a long period of time, to the point in which they still carry out these tasks without being specifically contracted to do so?

For example, an army recruit waking up every day at the crack of dawn to go for a run or exercise even after their service is through.

Solution 1:

The term automaton might suit

a person who acts in a mechanical or machinelike way

Merriam-Webster

Note that this term often has a slightly pejorative tone and is often used to convey lack of emotion as much as routine behavior.

Solution 2:

"Force of habit" seems to be the most general way to state it.

behavior made involuntary or automatic by repeated practice 

Merriam Webster link

As you mentioned in the comments, "conditioned" hits close to the same description, but to me it seems to imply it was done specifically to instill those habits. "Force of habit" does not carry the same implications.