This is not what I have eluded to. Working at the AT is much different, in terms of training adaptation, than remaining underneath it.
I am first and foremost an advocate, per this discussion, of speed work as well as work to raise the AT.
And I would agree.
Perhaps this is being reflected in your post because glycolytic work is above the AT and purley alactic work (ergo short sprints at max intensity) while mobilized via the anaerobic-alactic mechanism do not involve, to any meaningful degree, glycolysis.
To the point, speed work must not be considered as being synonymous with working above the AT. Nor must, aerobic power and capacity work be considered as being synonymous with working at the AT.
Again, with respect, from a physiological point of view, I would ask that you explain yourself more precisely because ‘doing AT work’ is a huge statement.
Please understand the attention that this discussion deserves because if asked what the track work consisted of we can’t just say ‘running’.