Thanks guys, well, I'm not the youngest...51 rings the bell but I'm doing my best to stay fit. It really does sound like a dehydration to me.
My question is, are some of you making special home made drinks? I normally don't get too technical and have just water but perhaps it's not enough.
Problem is, we play extensively, though it's only once a week, every Saturday from 12:00 noon 'till 17:00. It's quite a long day of tennis.
Oh yeah, I don't have focusing problems either. (brain wise maybe