Regardless if you are headed out for a short swim, long endurance run or hitting the gym for a workout, you need to understand what to eat before training.  your pre-training nutrition is important to top up your energy and be the right quantity at the right time for the workout ahead.  how much water should we be drinking before a workout to ensure we are hydrated? drink fluids throughout your day and be sure to drink at least a half litre to a full litre (two to four cups) of fluid starting four hours before your workout. showing up http://www.healthstandnutrition.com/what-to-eat-before-a-workout/