Whats the point of riding in zone 3 if its just going to put unnecessary stress on your body when you could be getting similar, if not better, benefits from riding in zone 2 for climbing endurance? Does anyone actually think that riding in zone 3 improves climbing endurance better than zone 2, or are we just drinking the cool-aid because thats what everyone else says? Zone 3 puts a lot more strain on your cardiovascular system, and that increased stress can lead to burnout, injury, or overtraining, which ultimately makes it harder to see improvements in climbing endurance.
Whos to say that you cant build just as much endurance, if not more, by spending more time in zone 2 and allowing your body to recover and adapt, rather than pushing it to the limit all the time? Im starting to think that zone 3 is just the sexy zone that everyone wants to talk about, when in reality, zone 2 is the actual unsung hero of endurance training. So, lets get real, does zone 3 really improve climbing endurance better than zone 2?