.....are not confined to limbs. It seems to be a big topic in other sports, especially American football and has been discussed for some time. I remember watching Pontin in my youth. https://www.bbc.co.uk/news/uk-wales-44253664
One of my favourite city players of that era. I wonder how many ex and present pro’s have head issues given the number of times they head a ball regularly from such a height and with such pace? Imagine someone hitting you regularly on the head over a 90 minute period, let alone training?