When summer temperatures soar, exercise may feel like the last thing you want to do. Yet working out in hot weather is possible if you adapt your routine.
Certain groups the elderly, children, pregnant women, and those with underlying health conditions face higher risks from heat stress and may be advised to avoid strenuous activity. Even healthy, active individuals must take precautions.
Heat and exertion together place heavy demands on the body. Sweating is the most visible response, part of the cooling process through evaporation. At the same time, the cardiovascular system is under strain: muscles require blood flow to keep moving, while the heart must also divert blood to the skin’s surface for cooling.
This dual demand makes workouts feel harder and increases the risk of dehydration, impairing the heart, lungs, and muscles.
If you plan to exercise on a hot day, consider these measures to stay safe:
Stay hydrated
Begin well‑hydrated — pale yellow urine is a good indicator. Drink small amounts frequently during exercise, keeping fluids cool in the shade or an insulated bottle. Electrolyte tablets can replace sodium and potassium lost in sweat. Rehydrate afterward with water, a sports drink, or even milk, which provides protein and electrolytes.
Lower exercise intensity
Start gradually and reduce intensity to account for higher heart rate and effort. Consider indoor alternatives such as an air‑conditioned gym or swimming.
Plan ahead
Planning ahead is key to exercising safely during a heatwave. Check forecasts and schedule workouts in the cooler hours of early morning or late evening.
Preparing hydration, clothing, and location choices in advance helps reduce risk and makes it easier to adapt your routine to extreme heat.
Dress appropriately
Wear light‑coloured, loose, breathable clothing to aid sweat evaporation. Add a hat and sunglasses and apply water‑resistant sunscreen (SPF 30+) at least 30 minutes before activity.
Change location
Avoid urban heat zones. Choose shaded green spaces or areas near water. If running, use loops so you can access drinks. Exercising with a partner adds safety.
Combine cooling methods
Use internal cooling (ice pops, cold drinks) and external cooling (ice vests, cold towels). Running hands, forearms, or feet under cold water helps. Cold showers or ice baths before and after workouts are highly effective.
Listen to your body
Heat illness can be life‑threatening. Watch for headache, dizziness, confusion, cramps, nausea, fatigue, heavy breathing, or rapid heart rate. Stop immediately if unwell.
The body adapts surprisingly quickly: within 5–10 days of exercising in hot conditions, tolerance improves and the risk of heat illness may lessen.
Still, common sense is essential. If symptoms occur, cool down rapidly, immerse in water, douse with cold liquid, or fan yourself in shade. Seek emergency help if severe.
