So I've ditched my "just ride" approach and embarked on a "training to potentially race" regimen the last few months, and virtually all advice out there points to intervals as the one and only driver of speed improvement. I've done intervals, but never with consistency, so I can't speak for actual results.
But, I've been paying very close attention over the last couple of years to fellow riders who are Cat1 racers and newer riders that have undeniable Cat1 abilities, and they never, ever do intervals or even hard group rides, but instead, ride a ton of miles at an almost exclusively Zone 2/3 pace and never get near their red zone in training. When they do group ride, they rarely do anything that taxes themselves. This is the case even for riders who don't race much, but can clean house in Cat 3/4 races and in TT's. It seems they've just built (and continue to develop every day) enormous aerobic engines that allow them to put the hammer down and keep it there when called upon. This is quite evident when they crack off very high average speeds on solo rides at %-of-max HR's similar to what most riders would see on a recovery ride to the coffee shop.
Over shorter distances requiring brief bursts of power (like a typical 1-3 minute Strava segment, for example), I can run with and even outrun some of these Cat1/2 guys, but over a longer distance, they can maintain it and I can't. So it begs the question, 1) are intervals really the only ticket to getting faster and 2) if you already have speed in your legs, is switching gears - no pun intended - to a whole bunch of aerobic training what will get you to a new level of performance? My intent here isn't to get out of (or suggest anyone else skip) suffering through intervals, but rather, to understand if it's the only way or even the proper way, given enough training time, to get faster.
But, I've been paying very close attention over the last couple of years to fellow riders who are Cat1 racers and newer riders that have undeniable Cat1 abilities, and they never, ever do intervals or even hard group rides, but instead, ride a ton of miles at an almost exclusively Zone 2/3 pace and never get near their red zone in training. When they do group ride, they rarely do anything that taxes themselves. This is the case even for riders who don't race much, but can clean house in Cat 3/4 races and in TT's. It seems they've just built (and continue to develop every day) enormous aerobic engines that allow them to put the hammer down and keep it there when called upon. This is quite evident when they crack off very high average speeds on solo rides at %-of-max HR's similar to what most riders would see on a recovery ride to the coffee shop.
Over shorter distances requiring brief bursts of power (like a typical 1-3 minute Strava segment, for example), I can run with and even outrun some of these Cat1/2 guys, but over a longer distance, they can maintain it and I can't. So it begs the question, 1) are intervals really the only ticket to getting faster and 2) if you already have speed in your legs, is switching gears - no pun intended - to a whole bunch of aerobic training what will get you to a new level of performance? My intent here isn't to get out of (or suggest anyone else skip) suffering through intervals, but rather, to understand if it's the only way or even the proper way, given enough training time, to get faster.