Water Works

In This Chapter

  • Understanding why you need water ^ Finding out where you get the water you need ^ Deciding exactly how much water you need ^ Discovering the nature and functions of electrolytes
  • X our body is mostly (50 to 70 percent) water. Exactly how much water depends on how old you are and how much muscle and fat you have. Muscle tissue has more water than fat tissue. Because the average male body has proportionately more muscle than the average female body, it also has more water. For the same reason — more muscle — a young body has more water than an older one.

You definitely won't enjoy the experience, but if you have to, you can live without food for weeks at a time, getting subsistence levels of nutrients by digesting your own muscle and fat. But water's different. Without it, you'll die in a matter of days — more quickly in a place warm enough to make you perspire and lose water more quickly.

This chapter clues you in on why water is so important, not to mention how you can manage to keep your body's water level, well, level.

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