Why heat training on Zwift makes sense and what you’ll need to get started
For many cyclists and runners, Zwift has become a go-to indoor training tool when the weather shifts for the worse. But beyond just logging hours in a virtual world, Zwift can also be the perfect platform for heat training. Here’s why heat training on Zwift makes sense, what you’ll need to get started, and how to make the most of your sessions.
Why Train in the Heat?
Heat training triggers a cascade of beneficial physiological adaptations:
- Increased plasma volume improves cardiovascular efficiency.
- Enhanced sweating response helps you cool more effectively.
- Lower core temperature during exertion reduces fatigue and perceived effort.
- Improved heat tolerance allows you to enter the warmer months ready to go.
In short, by making your body better at handling heat, you also make it more efficient overall.
Why Zwift Is the Perfect Platform for Heat Training
Doing heat training indoors gives you complete control over the environment. Zwift’s immersive world keeps your sessions mentally engaging while you focus on pushing your body’s thermal limits safely.
Here’s what makes indoor heat training on Zwift ideal:
- Controlled environment: You can precisely manage room temperature, airflow, and hydration.
- CORE data integration: view your core temp and Heat Strain Index directly in the Zwift HUD. Learn more here.
- Consistent workouts: No interruptions from traffic, weather, or terrain.
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Motivation and gamification: Virtual routes and social rides keep your mind off the suffering of heat training
What You Need to Get Started
Setting up your Zwift heat training environment is simple, but the right tweaks can make all the difference:
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A Warm Room or Lots of Layers
Turn off or limit fans and air conditioning. Alternatively, you can layer up or wear a CORE Heat Suit. Non-permeable layers work best. Remember: effective heat strain is triggered by an increase in both core and skin temps so trapping heat against the skin is ideal. -
A Reliable Thermal Monitor
The CORE Thermal Sensor makes it easy to track all your thermal vitals. Connect your CORE to Zwift to view your data in the HUD in-game. -
Plenty of Fluids and Electrolytes
You’ll sweat more. Sometimes double what you’d lose in a normal Zwift ride. So use electrolyte mixes to maintain balance and prevent dehydration. -
Towels and Ventilation Options
Even though you’ll start with minimal airflow, you can have a fan ready to cool yourself if your core temperature or heart rate climbs too high.
Key Tips for a Great Experience
- Monitor your body: Track your CORE Heat Strain Index (HSI) and be sure to back off and cool down if it starts to exceed 7/10. The ideal heat training zone is a HSI of 3-7.
- Hydrate early, not late: Start every session well-hydrated and sip throughout.
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Don’t chase watts: In heat, your power output will naturally drop. Use your HSI to guide your session, not performance metrics.
Connect Your Tech
CORE and Zwift have been working together to bring your thermal data into the head-up display in-game. Check out the guide here to learn more about how to pair your devices and follow Intervals.icu heat training plans in Zwift.
In Conclusion
Heat training on Zwift is one of the most convenient, effective, and data-driven ways to prepare your body for real-world challenges. You can build endurance, improve your heat tolerance, and unlock next-level performance, all without stepping outside.
With a smart setup, proper monitoring, and a little sweat, your Zwift sessions can become one of the most powerful tools in your training arsenal.
Now that you're all setup, why not try our built-for-Zwift heat training protocols