Hydration is more important than caloric intake itself, just as how although we could live several weeks without eating, we could only live a few days without hydrating. It is usually said that you can practice physical exercise for 90 minutes without food or drink. But, at this time of year, when the beginning of summer brings hot days and high humidity, the recommendations change and, to avoid significant levels of dehydration, we should always carry some water with us.  The consequences of dehydration are very serious and even irreversible in some cases.    The exchange of water in the body is continuous and it carries out important functions such as: R...