Have you ever thought about the effect exercising in the heat has on your body?
I love the heat… when everyone else is retreating to the indoors and air-conditioned buildings, I’m starting to come to life. And the hotter the better… or so I thought.
Tuesday, a couple of weeks ago, the weather was forecast to be 39 degrees celcius, so I advised my personal training clients to train early to avoid the midday heat. We take all the precautions we can to ensure no ill-effects from heat related illness.
But then I found myself with a bit of spare time in the middle of the day, so what do I do? I decide to go for a walk for an hour or so… congratulating myself, because I’m being sensible only going for walk and not a run!
On goes the sunscreen, light weight clothing, sunglasses, hat and 2 litre camel back filled with cold water… and off I go.

If someone (or yourself) is suffering from heat illness, follow these steps.
After an hour, I’m enjoying the heat and feeling fantastic… until I take a big shuddering breath and wonder what that’s all about. I take notice of my pounding heart and decide to turn on my heart rate monitor to see where I’m at. Now I usually walk briskly on about 110-117 beats per minute…
160 beats per minute!!!
That’s full on running heart rate… my body is working hard to cope with the heat. While in my head I felt fine, clearly I’m compromising my health. Fortunately I’m only 15 minutes from home and I stick to the shaded areas, while constantly sipping water. But when I get there and look in the mirror, my face is beetroot red – not my normal response to a walk at all!
While having a cool shower, I chastise myself… WHAT’S GOOD FOR MY CLIENTS IS GOOD FOR ME!
As we’re currently in the height of summer, here are a few tips from Sports Medicine Australia Victorian Branch to remember when considering exercising in the heat:
- Exercising in hot, humid conditions can lead to dehydration, heat illness and sometimes even heat stroke.
- Symptoms of heat illness – light-headedness, nausea, headache, confusion, not sweating, agressive or irrational behaviour – be alert for any of these signs!
- Stay hydrated – drink water before, during and after exercise.
- Take rests, preferably in the shade.
- Wear light coloured, lightweight and loose clothing that allows easy evaporation of sweat from the skin.
- Wear sunglasses, 30+ sunscreen and a hat.
- Reduce the duration and intensity of your warm up.
- Do NOT undertake strenuous activity if you have recently experienced a high temperature, infection, diarrhoea or vomiting.
- If you have a medical condition such as asthma, diabetes, a heart problem, epilepsy or obesity, are taking medication or are pregnant, you may experience difficulties exercising in the heat.
- If you are suffering from heat illness – lie down in a cool place, remove excess clothing, wet your skin or use ice packs and drink cool water. If your symptoms don’t improve seek medical assistance.
Here’s a helpful temperature guide from SunSmart:
Temperature: 31-35; Risk of Heat Illness: High-very high
Uncomfortable for most people, modify activities. Reduce intensity, take more breaks and limit duration to less than 60 minutes. Be cautious when relative humidity reaches over 50%
Temperature: 36 and above; Risk of Heat Illness: Extreme
Very stressful for most people, modify, postpone or cancel activities. Reschedule to a cooler part of the day or cooler location. Be cautious when relative humidity reaches over 30%.


How then, as adults, are they going to know how to exercise for health and well being? How are they expected to know how to combat lifestyle diseases, like cardio-vascular disease and Type II Diabetes?




The great news is that my walk of 43kms Saturday before last was effortless. It was 28 degrees which is getting close to nearly warm in my language. I didn’t crave easy carbohydrates (junk food) so my body is metabolizing fat storage well now. AND – No stiffness later that night or the next day. It was like I’d been resting all weekend. Couldn’t have been happier.
I have never been in such good shape coming into a Touch season. Aerobically fit and muscle strong. Who would have thought that walking in between seasons could do that?