Your cadence falls until your legs come to a grinding halt. If you back off a little bit or start to get tired, the trainer will up the resistance to maintain the prescribed wattage, which can result in what's called the 'spiral of deathвЂ™ - the trainer continues to up the resistance, and in turn, your tired legs continue to slow. While ERG mode has made indoor training more efficient, it has its caveats, and there is a learning curve. If you're riding or racing in Zwift or using an app like Rouvy or FulGaz, you may want to use Sim mode, so the trainer tailors resistance based on what's happening on the screen, such as climbs and descents. This is great if you're riding a workout with specific targets because the trainer will force you to do the work. If itвЂ™s set to 200 watts it will provide 200 watts of resistance whether you're spinning 80rpm or 110rpm, no matter what the cog on the cassette. If you have a smart trainer, ERG mode lets the trainer dictate the resistance rather than leaving you trying to find the right combination of gearing and cadence to hit a specific power. For a less expensive but equally cool hack, plug your fans into smart plugs and you can switch them on via a remote, rather than having to step off the bike mid-workout.Д®RG mode will adjust resistance to maintain a desired power no matter your cadence (Image credit: The Sufferfest)

If youвЂ™re looking to create the ultimate training space, the Wahoo Kickr Headwind can tailor its airflow based on your heart rate - but it isn't cheap. It doesn't cost a lot to get a big fan with serious power, we recommend looking on Amazon or at the hardware store. So, you're going to want a fan, and a powerful one at that, or maybe even two. Usually, the breeze from moving forward in space works to evaporate sweat and keep you cool, but when you're stuck in place, that's no longer an option.

Staying cool while riding is essential not only in terms of comfort but also performance - if your body gets too hot, the systems designed to prevent your organs cooking from the inside out will prevent you from working at your peak. The Wahoo Kickr Headwind is a smart fan designed for indoor training (Image credit: Josh Croxton)

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