When one is hungry, the digestive juices are in his maximum production, if water at the time takes it is neutralizing them and diluting, already they do not serve for the digestion, on the other hand, it fills his stomach and already it cannot digest well. It is one of the tricks to reduce.
If it takes one or two water glasses before the food he will not eat very much because it has the partially full stomach. When it has be and it starts eating is not OK to digesting because the stomach is not going to produce sufficient gastric juices because in this moment the water content is minimal, the thirst indicates dryness of the mucous one, for this motive, when it should be had be, capture liquid and later eat.
When a person is running, it cannot eat at once, first it must take water or any liquid of way of dipping his system, 10 minutes later it proceeds to eat, this is with the purpose of obtaining an ideal digestion.