Thomas, This is an extension of the sweating thread Given that your perspire a lot, could you give us an idea of your typical fluid intake during a day's training? And also the timing e.g. before the training, during the training and after the training. What sort of fluids are you taking? How does this differ during tournaments? Do you purposely drink a lot, say 2 hours before a match, then have a little extra about 10 minutes before the match starts? Have you calculated how much fluid you might need and purposely drink that amount to replace it, or do you just go by on how thirsty you feel?