[affgrff2]

Interestingly, the polarized training you describe is also know as the 80/20 rule that specifically recommend the opposite (80% low intensity + 20% high intensity) of what you mean by 80-20 (do just 20% to gain 80% of results).

[MezzoDelCammin]

ah, misunderstanding. What I meant is the somewhat natural tendency to see the 80% gains in 20% effort and then say "80%, that's good enough".