Strength training is a good example because it is an immensley stressful activity with adaptations that sometimes go into tics.
I believe I’ve read accounts of experienced meditators also stressing themselves to the verge of lunacy. Some even deal with panic attacks , unannounced, despite lecturing on inner peace.
https://pmc.ncbi.nlm.nih.gov/articles/PMC8380174/
In general psychosis-proneness is a quantity that people have more or less, some people have harmless hallucinations or "unusual experiences" but psychosis-prone people have more trouble when they are under more stress. Some researchers think that meditation practice could be protective
https://www.nature.com/articles/s41599-023-01856-y
Personally mindless use of the word "mindful" is a pet peeve of mine because I knew somebody who would talk about mindfulness just before he walked into an open pit. Also back when I was more anxious I always thought my mind was "full" by default and wanted to empty it, I found that many practices would just fill my mind up with more noise.
Ironically (or not), there is a Buddhist story about this...
A monk comes to see his master, and announces that he had achieved perfect mindfulness.
The master said, "That is wonderful! And, when you came in, how many umbrellas were by the door?"
The monk realized he had not achieved perfect mindfulness.
https://www.skepticspath.org/blog/what-is-the-science-of-med...