When the weather is close to 100 degrees and all you want to do is lay by a pool and eat ice cream until you see crazy person running in the heat and wonder how they are not dying of heat exhaustion. The answer to this question is hydration. Hydration is having a proper balance of electrolytes and water. Many people find it a surprise to find that hydration can be maintained by not only what you drink but what you eat as well. There was an article in Runner’s world on the most hydrating food which ironically people tend to crave when the weather warms up. http://www.runnersworld.com/article/0,7120,s6-242-302–13967-0,00.html This is because what you tend to crave is what your body needs to adapt to the climate. Have you ever noticed that when it gets cold your body craves fatty food ?(especially all the treats that come along ear the holidays) The reason for this is your body senses the cold and begins to crave high calorie snacks in order to gain fat and stay warm. The same principle happens with warm weather except you crave hydrating food like fresh fruits and vegetables.
Another myth that I learned was not true the hard way is that drinking only water is enough to stay hydrated through intense training. When I started intense marathon training I spent the whole day drinking gallons of water. Little did I know I was causing dehydration by diluting my solutes. I had began to feel weak and I had an unquenchable thirst so I drank more and more water. Then my body gave out and I fainted at work. I went to the hospital after ad was told I had hypokalemia, an abnormally low amount of potassium in my body( potassium is an electrolyte). After some potassium pills and two bottles of gatorade I felt like I had a brand new body. Ever since then I mix gatorade powder in my water after long runs to replenish the salt lost in sweating and exerting myself for that long.
Ironically that semester in human physiology we had to answer a question about a marathon runner who died during a race because of heart failure due in an insufficient intake of electrolytes while sweating an excessive amount of these minerals out. The answer to that problem was that every time she passed a water stop she reached for the water instead of the sports drink causing her to collapse in exhaustion. This doesn’t mean you should be drinking gatorade instead of water it is a recommended to drink a fluid with electrolytes if you are participating in a prolonged activity over two hours because this is when you begin to lose all those important minerals. The best advice I can give on hydration is to listen to your body. Don’t deny it what it needs and prepare beforehand for any type of exertion you plan to put it through.