I respectfully disagree. The analogy is relevant because:
If you can run 26.2mi, you can run 50mi. The distance might be different but the training wouldn't be very different at all. It's not like changing from the 800m (a sprint in terms of track and field) to the 5000m (a distance race). Also, if an elite marathoner chose to start competing in 50mi races, he would instantly dominate.
Clearly you don't know your ass from a hole in the ground with regard to running.
I don't know of any ultra-marathon runners that do a 10 repeats of a mile at 4:40. World class marathoners do that.
OTOH, 5000m and 800m workouts are a lot more similar. Sure 800m do more speed work and less distance work BUT they both do distance work and speed work. Modern 5000m running demands that you can finish in 55. That takes speed work, not just a bunch of long runs that progressively increase speed.
Don't agree. Look up Alberto Salazar.
Salazar could have been riddled with injuries (god knows he was riddled with being an asshole and part of Nike's 'doping' West club). If you were a competitive middle or distance runner you would have known many great runners who were limited by injuries. Mechanics are only part of it, genetics are another.
If there was big money in ultra-marathoning you'd see some of the top high volume work African marathoners doing them.
A better example is the Race Across America (RAAM) bicycle race. Cycling is not limited by injuries like running often is. The RAAM is 3,000miles and sleeping counts towards your time. In 1984 European based American pro Jonathan Boyer mocked the RAAM and declared he could easily win it.
In 1985 he trained specifically for the RAAM for one month and beat the record by a full day. This included him getting arrested, and having to spend a few hours in jail, for not having a light on his bike while riding through West Virginia.
The race was as much a sleep deprivation contest as it was a bike race but Boyer still prevailed.
If an elite 100m runner decided to dedicate himself to the 60m, he would instantly dominate.
LOL - that is far from a certainty. Just stop, you are embarrassing yourself.
Senri - get your ass in here and set this guy straight.