Drinking plenty of water is important, particularly among people who exercise vigorously. Follow the following recommendations:
  • Two or three hours before you start to exercise, drink 17-to-20 ounces or half a litre of water.

  • Twenty to 30 minutes prior to exercise, or while you're warming up, drink another eight ounces.

  • While you're exercising, drink seven-to-10 ounces or quarter a litre every 10 minutes to 20 minutes.

  • Within 30 minutes of completing your workout, make sure you drink another eight ounces.

  • Avoid drinking water just after having food.