Running in the heat can be enjoyable and risky at the same time. Yes, it’s nice to exercise in warm, comfortable weather. However, you can risk serious injury if it’s too cold.
The following lists 9 strategies that can be used to survive in hot weather. First, let’s investigate the science behind it.
The Basics of Thermoregulation
To understand how our bodies cope with heat, it’s important to understand how our bodies both conserve and dissipate heat, and how the environment affects the body. Our bodies conserve heat by shivering to create metabolic energy and by vasoconstriction, which is the shrinking of blood vessels. This shunts blood toward our core, which protects our major organs and keeps blood flowing from our heart and lungs and to our brain.
Our blood vessels can either vasodilate to send more blood to the surface of our skin so that heat can leave the body, or they can do the opposite and constrict. We can use sweating and evaporation to cool ourselves down, as long as the air around us is not too humid. The water on your skin will evaporate more quickly if the air around you has a lower concentration of water molecules. The interesting thing is that heat loss through evaporation of sweat is one of the most effective ways to cool the body. This is why hot, humid environments are even more challenging to race and train in.
The Basics of Heat Acclimation
The process of acclimation allows you to adjust to changes in your environment over time, so that you can maintain normal bodily functions and performance in a variety of different conditions. Your body is making internal changes to better function in hot environments. Some key changes that occur to your body from chronic exposure to heat are increased sweating, decreased sweat electrolyte concentration, expanded blood plasma volume, lower skin and core temperatures, lower heart rate during exercise, increased fluid and cardiovascular stability, and decreased metabolic cost of work (exercise). When these factors are combined, they result in a greater ability to tolerate and feel more comfortable in the heat during exercise.
Methods of Heat Acclimation
Now to the important details, how do you get better at running in the heat? One way to jumpstart the heat-acclimation process is to run in hot weather conditions. This will help your body get used to the heat and prepare for summer running or an upcoming warm-weather race. There are many ways to achieve this goal and most have been shown to be effective. However, we are looking for the smallest effective dose that gets results in performance exercise physiology. Now why isn’t more always better? You need to find a balance between heat acclimation and the rest of your training. Extra stress on the body, just like a bump in weekly volume or additional intensity work. You will have to work out less if you want to heat acclimate.
The more you increase your core body temperature, the more your body will become adapted to it and be more comfortable.
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