Just curious... Some people say 8 glasses of water but some say that is too much and can result in overhydration. How many liters of water should a 16-years-old teenager (boy) drink a day?
I live in Czech Republic and the doctor here (for other matters I won't get into) suggested that I start drinking a specific mineral water with the following composition in milligram per liter: Na ...
I drink a lot of water through a normal day, even when passive - about 7-9 liters. On days when I work out, I likely drink about 1-3 extra liters. Is there a rule of thumb for taking in extra ...