I personally believe that exercise is overwhelmingly beneficial and exercise every day, but there is evidence that athletes have slightly increased risk of ALS (though this may be related to something other than exercise itself, eg maybe the fields on which sports teams play have harmful chemicals, higher head injury rates, etc)
I have never seen a study saying exercise is bad for you.
https://pmc.ncbi.nlm.nih.gov/articles/PMC10151186/
I personally believe that exercise is overwhelmingly beneficial and exercise every day, but there is evidence that athletes have slightly increased risk of ALS (though this may be related to something other than exercise itself, eg maybe the fields on which sports teams play have harmful chemicals, higher head injury rates, etc)
Another feather in the cap of the undisputed champion of health studies.