Competing in an extremely hot environment is not only physically grueling but overheating is a serious risk which needs to be planned for. Hot climates can lead to mild performance impacting problems like heat cramp or exhaustion but also more severe conditions such as heat stroke, when the bodies mechanism to control its own temperature literally shuts down. By being adapted to the heat, your body can cope better with the stress and you can guarantee a more enjoyable race experience.
How can we adapt?
The good news is that we can adapt to managing at higher temperatures pretty quickly, so runners don’t have to think about it until they start tapering for an event.
Here are a few options:
Heat Chamber If you don’t mind splashing a little, heat chambers are the gold standard for heat training as you can control all variables (temp, kit, pace etc) and therefore simulate the race environment. To optimize the adaptation, it is recommended to do heat acclimation every day for a minimum of five days but up to 10–14 days before you line up on the start line. These sessions should last between 60 and 90 minutes.
Layers To simulate heat run with a few extra layers of clothing. Aim for about five to ten sessions over a period of two weeks preceding a race. This is a very basic DIY approach that may work if outdoor temperatures are high enough. When starting out, you should reduce your intensity slightly for the first few sessions to avoid any negative heat-related effects.
Saunas and Baths Using an artificial source of heat such as a sauna or bath can also aid adaptation. It is recommended to train for up to an hour prior doing so. This is so that your core body temperature is already increased, which will allow for greater heat adaptation. You should start this approach three weeks out from your event for 15 minutes a session, three times a week. Closer to the event, you can increase the duration to 30 minutes, four times a week. Whilst there may also be benefits from solely using the sauna or bath without exercise, exercising at 60% of your VO2 max in the heat produces the quickest results.
Hot Yoga and other methods Any exercise in a hot environment that raises your core temperature to sufficient levels for a long enough time induces adaptations. To maximize the benefits try to do sessions of 60 mins and raise your heart rate whilst doing so. At the end of the day you want to ensure that you are doing something which fits in with your life and if hot yoga is something that appeals more than sitting in a sauna every day then go for it!
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