The Spaniard, who turned 32 during his Roland Garros fortnight, was once again at his grinding, unflinching, un-giving best as he downed Thiem 6-4, 6-3, 6-2 in Sunday's final.
"You have to be humble and accept that you have to work to improve things", added Nadal.
When the trainer visited Nadal in his quarterfinal for a similar issue, Nadal said it was simply to prevent sweat from traveling to his hand. "I can't be always thinking of more".
"Of course I have ambition". I have passion for what I am doing.
"I have never been insane about this kind of stuff", said Nadal. No, you can't be frustrated always if somebody has more money than you, if somebody have a bigger house than you, if somebody have more Grand Slams than you.
"You could feel the problem he had with his arm was bothering him a little bit".
"This is perfection. They are the best players in the world and are proving that even when your body is not as young as it was, when one still has the drive and is well prepared, nothing replaces talent and strong will", said French Open tournament director Guy Forget, a former top-10 player and French Davis Cup and Fed Cup captain. It is his most one-sided final win since allowing Federer just four games in the 2008 final.
This sight does not get old, Nadal reaching the French Open final and then beating the opponent to get another Grand Slam.
Thiem put up a good fight in his opening service game of the third set, saving four breakpoints. Halep kept insisting she needed to do it, and could do it - and she was correct. Its neck-in-neck in the first game.
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Not that 17-time Grand Slam champion Nadal, whose latest feat is all the more remarkable considering he was sidelined for several weeks this year due to injury, is preoccupied with trying to keep up with his Swiss rival. The question is when each will be ready for the next step.
Suffered his first French Open loss in 2009 to Sweden's Robin Soderling in the fourth round.
"All in all", Stephens said, "I don't think anyone can complain".
Last year, he lost 15-13 in the fifth set of his last-16 tie against Gilles Muller.
- Introduced to tennis by another uncle, Toni Nadal, who encouraged his naturally right-handed nephew to play left-handed as it would give him an advantage.
Thirteen years and 17 Grand Slam titles along, with Nadal aged 32 years and one week, still, nobody has ever said anything any truer.
At the Slam before that, the U.S. Open last September, Nadal was the last man standing.
Hugh Grant was one such punter who managed to get a ticket, with the actor sampling the delights of Roland-Garros with his new wife Anna Eberstein. None of the beneficiaries was more celebrated than 190th-ranked Marco Trungelliti.
Became the first man to win five successive French Open titles in 2014.