As once hard activities begin to feel routine,
they require less willpower; you have to fight yourself less and that frees up valuable energy that can be spent elsewhere.
Not exact matches
But over time, as going to the gym becomes a habit, it's going to
require much
less willpower.
One of the reasons for the success of the paleo diet / lifestyle is that is
requires *
less *
willpower.
If you dislike doing something, you won't do it unless you have to, and if you have to do it, it
requires some use of your
willpower, and you more or
less force yourself to do it.
So if you want to help your partner have the motivation to pursue a goal, try to help them to avoid other,
less important, activities that
require effort and
willpower.