I think a lot of these are discipline strategies and I'd wager that personal trainers to professional athletes perform as less of an external source of discipline and more of an external brain/workout strategist/source of encouragement, as professional athletes usually already have the discipline/motivation a little under control.
Whereas personal trainers (as opposed to professional trainers and more in line with the previous comment's thought of a single nemesis/mentor) would need to be that external source of discipline, as well.
Totally guessing here, no experience in the training world whatsoever, feel free to tell me I'm way off base.
Not really. Because it's not clear I could see the entire of the athletes programming. Or even the tiny sliver of the coaches programming for the one athletes.
We would work out adjacent to each other in an empty gym twice a week and I could observe their workouts.
Sorry if that's shirking your question but wouldn't want to overstate and offer something incorrect.
