Kids need sports or electrolyte drinks in hot weather

What the research found

Official guidance says water is the best drink for children, and kids need extra water when exercising or in hot climates. Healthdirect lists sports drinks among drinks to avoid. They contain sugar and are acidic, which can lead to tooth decay. A US paediatric site says water and milk are all the drinks kids need.

Electrolyte drinks do have a place when a child is sick. A 2019 review and guidelines from 2003 and 2014 on gastroenteritis (gastro) recommend oral rehydration solutions for children who are losing fluids through vomiting or diarrhoea. These are medical rehydration products, not sports drinks, and the advice is about illness, not hot weather.

Hydration itself matters. A 2023 review says children, especially younger ones, are more prone to dehydration, and that studies in children are scarce. A 2019 review of hydration in the general population found the evidence is largely associative and that gaps remain for children. None of the evidence shows healthy kids need sports drinks in the heat.

What it doesn’t mean

• This does not mean hot weather is low risk. Babies and young children are at highest risk of dehydration, and thirst means a child is probably already dehydrated. Offer water before, during and after activity.
• If your child has vomiting or diarrhoea, an oral rehydration solution may be appropriate. Mild cases can be managed at home, but see a doctor or go to hospital if you see signs of severe dehydration or your child seems to be getting sicker.