Getting old. While definitely preferable to the alternative it still sucks. In my 20's and 30's I could play football on Saturday afternoon, go out afterwards and end up in a nightclub until 2am and then on to a house party, get up for Sunday morning football, after two hours sleep, and then go out on the beers all afternoon and still be fine to get up and go to work on Monday morning. Now I'm in my late 40's and if I sleep a bit funny I'm in pain for days.
Getting old starts early. I remember in my mid 30’s struggling to recover from knocks in time for midweek training, whereas in my mid 20’s it would be training on Wednesday and 5-A-side on Thursday prior to playing at the weekend. Once upon a time, 36 holes in a day but I can barely manage 18 holes in a week. Getting old sucks.