GCN is probably the most watched cycling channel in YT all over the world. I still watch their channel. Though I don't fully trust the information they present, they're good entertainment.
I'll discuss a few of these "GCN myths" based on my OWN personal experience about these topics
Let's discuss these and also share what other GCN myths you know!
1. Pedaling out of the Saddle (OOS) in the middle of a long climb. This really sucks will only messes up your body's energy management. The few difficult climbs I bonked or failed involved some OOS pedaling in the middle of it. If you depend on pedaling OOS during a long climb to relieve your back, relieve some of your muscles, there may be something wrong with your bike fitting, saddle choice, or even your seated pedaling technique to begin with.
Riders I catch doing this often in the middle of a long climb, they are bound to slow down soon or even stop at the side of the road to relieve their legs. Or worse, bonk their long ride.
2. Obsession with chain lubrication. I can't tell any difference no matter the state of my chain and it reflects on my ride times - zero effect!