As a heatwave grips much of Australia, questions about the best ways to stay hydrated are top of mind. Experts weigh in on common myths and provide evidence-based advice.
Do you need electrolytes?
Electrolyte drinks are popular, but for most people, water is sufficient. Professor Vincent Ho from Western Sydney University says that unless you are sweating heavily from prolonged exercise, electrolyte drinks are not necessary. 'For the average person during a heatwave, water is the best choice,' he explains. Electrolyte drinks contain sugar and can contribute to calorie intake.
Will tea cool you down?
Hot drinks like tea can actually help cool the body. According to Dr. Ollie Jay from the University of Sydney, hot drinks increase sweating, which cools the skin as sweat evaporates. However, this works best in dry conditions. In humid weather, the effect is reduced. Iced tea can also be hydrating, but watch for added sugar.
Is it safe to drink beer?
Alcohol is a diuretic, meaning it increases urine output and can lead to dehydration. Dr. Sandro Demaio, CEO of VicHealth, warns that beer is not a good choice for hydration. 'Alcohol impairs the body's ability to regulate temperature and can worsen dehydration,' he says. For each standard drink, you may lose more fluid than you consume. Stick to water or non-alcoholic options.
How much water should you drink?
The general recommendation is 2-3 litres per day for adults, but needs vary. The National Health and Medical Research Council advises that thirst is a good indicator. In extreme heat, increase intake. Signs of dehydration include dark urine, dizziness, and headache.
Are sports drinks helpful?
Sports drinks contain electrolytes and sugar, designed for athletes. For most people during a heatwave, they are unnecessary and can add excess sugar. Water is best. If you are sweating heavily from physical activity, a sports drink may be beneficial.
Do you need to avoid caffeine?
Moderate caffeine consumption does not cause dehydration. A study by the University of Connecticut found that caffeine has a mild diuretic effect, but it is not significant enough to impact hydration in regular coffee or tea drinkers. So your morning coffee is fine.
What about coconut water?
Coconut water is a natural source of electrolytes, but it is not superior to water. It contains sugar and calories. For hydration, water is still the best choice unless you need extra electrolytes after intense exercise.
Can you drink too much water?
Yes, excessive water intake can lead to hyponatremia, a dangerous condition where sodium levels drop. This is rare but can occur if you drink large amounts quickly. Listen to your body and drink when thirsty.
In summary, water is the best choice for staying hydrated during a heatwave. Electrolyte drinks, sports drinks, and coconut water are not necessary for most people. Tea can help cool you down in dry conditions, but avoid alcohol. Stay safe and stay hydrated.
