Jono, I have my idea about what happens in the body of a top 800m runner, and my idea is very much more simple than all the physiological hypothesis.
But I’m not interested to discuss this point, in my opinion a speculation not producing any advantage to the knowledge of the real training.
Synthetically : the limiting factor in a competition of 800m is the ability to run with very HIGH ACCUMULATION OF LACTATE. For several factors, when there is a high lactate accumulation in the muscle fibers, the ability to contract and to relax is inhibited.
On the other side, if an athlete doesn’t have a high LACTIC POWER (or Anaerobic Power, what you prefer), he NEVER can reach top results in this event.
For that reason, with training we need to have clear in mind that the three MAIN GOALS to reach are :
1. The DEVELOPMENT of LACTIC CAPACITY, making the athlete able to produce more lactate
(it’s not true we can’t improve this ability, you make confusion between LACTIC POWER and LACTIC CAPACITY)
2. The DEVELOPMENT of the ability to run with high level of lactate saturation, in other words the ablity to run with high lactate accumulation’s tolerance. We call this ability LACTIC RESISTANCE, which is connected with the AEROBIC SYSTEM : stronger aerobically you are, higher lactic resistance you have.
3. The DEVELOPMENT of the ability to remove in short time the lactate from the fibers. This is exactly the role of AEROBIC POWER, and in some way is connected with the permeability of the cell membrane.
All these factors are connected one another, and to forget one of them doesn’t allow any athlete to produce his possible best result.
You can give the name you want to these final goals, this doesn’t change what a coach has to do.
For example, for increasing the final sprint in 1500m, is it more important to work for bettering the SPEED, or for enhancing the AEROBIC POWER and the LACTIC RESISTANCE ?
Our problem is TO RECRUIT THE HIGHER PERCENTAGE OF FAST FIBERS WHEN ALREADY FULL OF LACTATE, and this has very little to do with the maximal speed.
The ability to recruit fast fibers when already saturated is extremely important in every final of competitions, when we speak about 800 and 1500m.
If this is a problem more connected with the nevous system or with the metabolic system, frankly is not in the interest of any REAL coach.
A coach is interested in the SOLUTION of the problem, not in pseudo physiological discussions that are not able to put together different opinion from different physiologists, also because they are not able to do any research with the top athletes.
And do you know why top athletes don’t accept to be objects of any research ?
Because physiologists want to do researches according their protocols, BUT NEVER WANT (OR HAVE THE POSSIBILITY) TO FOLLOW A LONG PERIOD OF REAL TRAINING DURING WHICH THE ATHLETE GOES TO CHANGE HIS PHYSIOLOGICAL PARAMETERS AND VALUES.
So, the only thing physiologists can do, is to have a STATIC PICTURE of a top athlete (for example, all his values at the end of a training period), but not a DYNAMIC MOVIE about what happens in his body, day after day, with his training.
This means physiologists NEVER can give some aid for top athletes, but ask top athletes to be a help for their researches.
And, frankly, nobody among the best athletes in the world is interested in this type of investigation, if the final goal is to write some article with very little signification, compared with the methodology used with the best distance runners in the world.