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 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)