Retrieves, but does not remove, the head of the queue represented by this deque (in other words, the first element of this deque). This method differs from peek only in that it throws an exception if this deque is empty.
A Lack Of Water Is A Lack Of Brain Power. Led by Dr. Caroline Edmonds, researchers in the UK recently conducted a study showing that even mild dehydration has a negative effect on the brain's performance. Drinking water, the researchers found, can improve the brain's ability to complete tasks that require a rapid response.
Water revs up metabolism and helps you feel full. Replace calorie-filled beverages with water, and drink a glass before meals to help you feel fuller. Drinking more water helps amp up metabolism - especially if your glass is icy cold. Your body must work to warm the water up, burning a few extra calories in the process.