I saw once a log of Hesch on this site and it different to what Horwill publishs, like two hard efforts in a week and rest was easy jogging.
A rotation was like 1500-3k-5k-tempo pace or something, so he did only one lactic session every 2 weeks, so you argue against yourself(atleast according to this log).
So why doing 1500m pace work when it is done so easy that its not taxing anymore?
If the aim of such a session is not to train the anaerobic capacity why should someone do it?
Switch to 100m sprints and there is not damage on the endurance at all but real work for the muscles/power.
So only Renato Canova,Jos Hermens have the right to critisise?
Actually almost every world-class middle and long-distance runner stays away from 800-1500m pace stuff for most of the year, they are may be not coached by me but i think i can use this as an argument.
Stay calm boys..