Active cooling. You’ll need a fan. Usually more than one!


Unless opening your windows turns your training area into a 70 km/hr wind tunnel, get two fans and reap the benefits of training at full power.

I was stuck living out of temporary accommodation at the end of last year and struggled with poor cooling. I can go back through my training log and see all the failed workouts and my notes.
They all say something along the lines of “Too flipping hot. HR through the roof. Start earlier tomorrow”.

I’d also add that AC is divine if you live in a hot and humid climate.


For me it’s both. Two air blowers to keep the sweat down, but also the window needs to be open a bit, otherwise humidity steams up the windows and probably isn’t good for the equipment, computers, etc.


fan, not even close, 100% all setups need a fan. the rest (open window or not) depends on what if any HVAC you have for the room.

1 Like

Riding outside at 20mph is the equivalent of having roughly ~7500 cubic feet per minute of air going over your body.

Get a fan. or 2. Or 3.


Most of us have and we’ve all gotten better fans.

Evaporative cooling works better when there is air moving over your body.

Have fun though!


In the winter my basement gets under 50 degrees and I always need 3 fans when I’m doing sweet spot. But if you want to learn the hard way go for it


Yeah, have tested in a super cold garage a few times. Seems like you would freeze when you start. But that changes soon once you get to work. Without a fan, you will be gaining more heat than you can shed, without a fan.

That and all the experience from many people says air from 2-3 VERY good fans, and cool air is a bonus.


Even in 20°F in the garage in the winter I run 2 fans on max speed. I start off with no fans for the first 10 min or so, then need fans after that point. Get the highest volume air moving fan you can


only if opening that door/window means you have a strong wind blowing past your body.


Another +1 for a fan. I was just about able to train in my unheated garage if the temperature was below about 5C, but it was tough to get started and warm up was a chore. Even then I’d end up drenched in sweat, and get instantly chilled after the workout.

Now in Winter I have a heater in to raise the temperature to around 12C, and use a fan during the workout - Much more comfortable.

I’ve also tried training outside on the Turbo if the weather’s been nice, but not unduly hot - just about managed once or twice. Again, for me, inside +fan is best.

Hahaha, had to laugh at learn the hard way, this is so true… I run two fans with a third as backup, all hooked up to plug remote for easy control on the bike, as per GPLama. Cheap setup from Jaycar here in NZ.

Its airflow around you that makes the difference, otherwise you are just heating the air around your body, I know somebody how turbos under and umbrella in the middle of the garden (in the uk) and they still have a fan

I’ve trained outside in 35-45f. Absolutely terrible experience. Simultaneously overheating in the core, sweating like crazy, and my extremities painfully cold. Airflow and hot is far better than still air and cold.


Pre workout I flush out the air with opening up my apartment Windows, turn the 2+ fans on and wait for the room temperature to drop. Airflow is key

1 Like

Plenty of sources say fans are necessary indoors aside from those posted here. Out of curiosity, I’m wondering if being in low temperatures indoors is just as bad as outdoors for the tendons, joints, muscles, etc. unless they’re covered with something (ie leg warmers, knee warmers, and ankle covers).

1 Like

Get a few fans.

I have a 1 fan pumping cool outside air in, 3x fans in front of bike, 1x fan behind bike.
All fans controlled by remote power switches.

I literally couldn’t do any intense workouts without them.


If I’m planning on sweet spot or threshold riding, I can go out in short sleeves and shorts and be comfortable down to 10C, and I’ll put on arm warmers down to 7C. Did that on a ride recently that was only 1:10 long, but 60min of that at sweet spot. This is air moving across me at 30-40kph. When I’m on the trainer, right now it’s about 16C in the basement, but even if it were 5C, an open window would do jack to actually cool me down, there has to be a lot of air movement to actually get the heat off me, otherwise you could stick a fork in me after ten minutes. So, yeh, you definitely want fan(s), not just an open window.

Ok, I’ve got the heavy hitter Lasko blower fan recommended multiple times on the forum. It’s not enough - so do I just get another one? Or are there better/different recommendations in addition to this blower style fan?

Also, what do you recommend for fan locations? I’ve got the Lasko on the floor blowing at my upper midsection and sometimes head.