To me, simplifying it down to ‘feeling like it’ collapses the difference between someone who consistently will choose to swim in the aforementioned example, and someone who consistently won’t. You could call the difference ‘being better at delayed gratification’ but I think the usual definition of willpower covers it quite well.
To me, that reads as a more complicated form of “feeling like it”...
To me, simplifying it down to ‘feeling like it’ collapses the difference between someone who consistently will choose to swim in the aforementioned example, and someone who consistently won’t. You could call the difference ‘being better at delayed gratification’ but I think the usual definition of willpower covers it quite well.