We were talking about this video on a run last night. A lot more questions than answers but a lot of insight too. Some things that were brought up:

-It's not that 'no intervals' is ineffective, it's that it *could be* less effective than structured intervals. This is nearly impossible to measure tho, as group rides and intuitive training are not easily replicable. A very good rider doing 95% effective training will still find himself at or near the front of the pack.

-The point of doing intervals is to control the specificity of training. A world tour cyclist almost by definition has a good intuition of what training should be to compete in world tour races. "Doing Madone 3 times kinda hard" may not be called interval training, but a power graph of that ride and 3x40min @85%FTP are practically the same.

-Very probably, for a top tier cyclist, it's going to be likelier they to go too hard than too easy. Interval are a tried and true way to control this.

-Group rides frequented by a bunch of triathletes on Slowtwitch are not a good representation of group rides on World Tour teams. World Tour racers will know how a World Tour race goes, and one should reason that their group rides by and large reflect this racing.

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