Design and Technology/Biology KS3: The science behind hydration

Olympic boxer Natasha Jones explains the importance of staying hydrated whilst training and competing. Meanwhile, Stefan Gates demonstrates the chemical composition of sweat.

We hear how the body is 60% water, and how we lose 2-3 litres a day in wee and sweat.

We hear how the sweating mechanism and thermoregulation work.

This is short film is from the BBC series, Gastro Lab.

Teacher Notes

You could challenge students to keep a diary of how much water they drink every day for one week.

They can then assess whether they drink enough and increase their rehydration during energetic activities.

Have they ever had symptoms of dehydration (headaches, tiredness, fatigue)?

They can be asked to make a note of the ways that they might increase their fluid intake, making sure that this does not exceed the requirements or add excess sugary or fatty foods and drinks to their overall diet.

Curriculum Notes

This short film is relevant for teaching biology and food technology at Key Stage 3 in England, Wales and Northern Ireland, and 3rd Level in Scotland

More from Gastro Lab:

The science behind carbohydrates
The science behind dietary fibre
The science behind fat
The science behind protein
The science behind vitamins and minerals