Fuerza or Resistencia
In Portugal you will be called Força ou Resistencia. Some folks they think that Portuguese and Spainish (castellan) are the same language.
Ok, first my comment goes for the your question – what may be the running specifics ?. If VO2 and VO2 running pace would be – an accurate indicator or the best indicator of someone capacity, then ther´s no really interest in organize competitions, the medal will be given to the runner with best VO2 or able to do the best VO2 pace. But the true is that this isn´t true, In a certain proportion no one knows what´s the best physiologic requirement to run faster. The same with race pace in intervals. Of course that the range of probability of a guy with maxVO2 of 39 and someone of 68 I bet that the 68 will win in most of the distances. The same with intervals, particularly long intervals. If someone isn´t able to do 6X1000m/5:00 rec=3min (following your example) but another runner runs 6X1000m/2:40 rec=3min, of course that the one of 2:40/kilo pace will win most of the races if not all of them.
But VO2 as well as Race Pace Target Distance despite that they aren´t perfect to an accurate estimation of a performance, which do you think that´s the best to use for estimate your running capacity and otherwise to simulate the running effort as well as a training workout ? In my opinion Race Pace that´s the best. Why?
1/First you do a real run, and not a lab run under the pace you estimate you are going to run your race distant event
2/Second, the result is a good estimate what´s your shape condition.
3/If you want to simulate in terms of perceived effort as well as physical demand a run – with less tiredness than race pace, and if you want to use intermittent efforts I don´t know nothing so good as than to divide a race distance event in parts (reps). With such a method you are able to stay longer periods in your race pace.
Then compare the 6X1000m/race pace rec=3min (following your example) and 6X1000m/VO2 pace I would prefer 1000s in Race pace for the reason I mentioned, what´s the 1000s in VO2 pace? Different than race pace for sure.
Now, running that´s mathematical in that aspect. If someone, under normal conditions - isn´t able to produce 6X1000m/3:00 alone or with a group in a workout - he hardly will do 15:00 for 5000m. But if he is able, may be he does 15:00, may be he doesn´t. But his VO2 pace is faster than 5000m race pace, what´s the meaning to run a 6X1000m/2:50 pace to prepare a 15:00 5000m race pace ?
Remember that race pace is a flexible pace – the race pace changes according that to your race distance event, but VO2 is much more steady, so you train for a 800m run in the same VO2 pace you train for a Half marathon run?
The more I see the more I believe that the matrix of all training specifics (workouts as the Americans call that) that´s race PACE, THE MOTHER AND THE PACE GUIDE OF ALL SPECIFIC TRAINING.All turns around race pace.
This said, I don´t deny the some interest of those who use VO2 training.
Any effort, even the not too much adequate there´s a change to make running improvement.
But I think that objectivity and specificity is the main issue of training. If you pretend to run a marathon you need to train in the streets somewhere somehow, if you pretend to run a 3:00/5000m or a 3:30/1500m this 2 paces are the referential – all the rest that´s not specific – that´s distant than specificity.
Excuse me all physiologists if i´m wrong. In the past most of the best performances weren´t done with the use of physiology but mainly with the use of training methodology- not neglecting the interest of physiology (a second line of interest for a coach). In the present we see the Kenyans and Ethiopians running fast times without that physiology connection. And in the future the best performances will remain out of physiology as the main interest of training guidance.
Physiology have a training dominance only when the use of drugs is the focus. But there are several coaches that they don´t believe in physiology really, but as they want to cause some GOOD impression in people that follow their principles from times to times they send out some new data to impress the public opinion. That´s the case of this VO2 or VO2 pace. That´s something to impress the audiences. People that have intellectual or pseudo-scientific minds, they full their mind with data research – and they are happy and satisfied. Training is something more serious, it takes some seasons of undisrupt training to see progress.
PS1 – Saying this I don´t want to comment on J. Daniels that I never speak directly and that i don´t know enough of his work to make judgement.
PS2 - Fuerza, next time you may include in your workout examples as 15X400m or 6X1000m what´s the distance event that the runner is going to prepare 800m, 1500m, steeple, 5000m, 1000m or HM or marathon? You also may include whats´the runners goal for that event distance and also in what time he did/or wants to do that 15X400m or 6X1000m. Without thata data both workouts means nothing at all. 50sec recover for a 15X400m/63sec that´s very diferent than 15X400m/75sec. Also 6X1000m/2:45 that´s very diferent than 6X1000m/3:05.