Hypotonic Sports Drink

What's this Science Bite about?

Hypotonic sports drinks are very low in carbohydrates (sugars) and they are designed mainly to replace fluids lost through sweating.

They are used by athletes that do not need an energy boost during training. Hypotonic drinks have a concentration lower than blood so it is very quickly absorbed into the blood stream to rehydrate the body. Water is the main hypotonic sports drink available. These drinks are generally the best if you have been working out for less than an hour and a half and you just need to replace fluids lost through sweating.

Always remember to ask your parent or guardian to help you.

What you'll need

Water, fruit squash and some salt.

  • 100ml fruit squash
  • 1 litre water
  • Pinch of salt

How to make a Hypotonic Sports Drink...

  1. Mix the fruit squash with the water.
    Adding the fruit squash to the water.

  2. Add a pinch of salt.
    Adding some salt to the mixture.

  3. Stir well to make sure the salt dissolves. Place in the fridge to cool down. Pour the drink into an empty sports bottle and drink after exercise to rehydrate after exercise.
    Mixing the sports drink.



Glasgow Science Centre