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发帖数: 9013 | 1 Happen to see this interesting article. (maybe it's old)
http://www.sportsscientists.com/2008/10/15959-sub-2-hour-marathon.html
1:59:59...will we ever see a sub-2 hour marathon?
It's been just over a week now since Haile Gebrselassie ran himself into
history (again) when he broke his own world record by running 2:03:59 in
Berlin. More important, he also broke the 2:04 barrier, which gave even more
impetus to the usual speculation that accompanies a world record. At the
time, I wrote that we'd look at the future of the marathon once the dust had
settled. I guess it's well and truly settled now, apologies for the delay,
but here's our take on the question that has been a topic of some discussion
in the last week or so - will man ever run a sub-2 hour marathon?
Barrier-breaking speculation
It's quite normal for (sometimes wild) speculation to accompany any world
record - it happened last year as well, with Gebrselassie predicting a 2:02
in the near future. He tempered that enthusiasm this time around, saying
that he felt like a 2:03:30 was possible. Dave Bedford, the race director of
the London Marathon, was not quite so circumspect, and his words last
weekend were: "Without doubt I will see a two-hour marathon in my lifetime.
It might be towards the end of my life. It might be another 20 years. But,
yes, it will definitely happen."
Dave Bedford, for the record, is 58 years old, and perhaps the best response
to this I've seen is from the guys over at LetsRun, who wrote that he'll be
wrong unless he plans to live to 138 years old!
That's the sentiment of most - they are saying that it's a long, long way
off. For example, Glenn Latimer, who oversees distance running in the USA
was quoted as saying that the sub-2 hour marathon is a "far-off dream", and
that "If you look at what his splits were, averaging around 14 minutes 45
seconds for each five kilometres, they're amazing. You're talking something
else altogether to go down significantly below this". So he reckons it's a
little soon to be excited by a sub-2 hour performance just yet.
I thought I'd take a little more of an analytical look at the chances,
borrowing a little from the history the event, and also the commercial
aspects that might, in some respects, prevent many great athletes from
breaking the record, thus slowing improvement. Then I'll scan "the lay of
the land" to see just who might come through in our lifetimes (assuming that
Dave Bedford does in fact reach about 90 years old) and do what Bannister
did for the 4-minute mile. One must of course be mindful that people,
including scientists, have often painted themselves into a corner with this
kind of rationalization in speculation. But here's our take on the sub-2
hour dream!
Understanding where the current "golden era" comes from - looking back
The starting point in trying to predict the future is understanding the past
. And there is no doubt that marathon running is in something of a golden
era. Remember, in 1998, the world record stood at 2:06:50, by Belayneh
Dinsamo of Ethiopia. That's only ten years ago, but the record was already
10 years old.
However, we then had a flurry of world records, first Ronaldo da Costa and
then Khalid Khannouchi taking the record below 2:06, to 2:05:38, through
their collective efforts in the late part of the 1990's.
All the while, the world was waiting in eager anticipation for the next
generation to turn to the marathon, because great things were expected from
them. That is, Paul Tergat, Haile Gebrselassie and Salah Hissou had been
rewriting the record books on the track, over 10,000m, and when they
eventually moved up to the marathon, the general perception among the
running community was that we would be in for some major overhauls!
And so it proved. Hissou disappeared (anyone know what happened to him?),
but Tergat and then Gebrselassie certainly delivered on the expectation,
even if it did take them a few attempts before they got it right. Therefore,
what we are seeing in the marathon today is very much a function of what we
saw on the track over 5,000m and 10,000m in the 1990's.
Take a look, for example, at the following table. It shows the world record
over 10,000m.
The 10,000m world record was lowered by an incredible 30 seconds over a four
-year period thanks to the efforts of Gebrselassie, Tergat and Hissou. Who
can forget their duels in two Olympic Games, and in particular, it was
Tergat who drove one of the most spectacular periods ever seen on the track
in his battles with Gebrselassie.
The point is that this kind of performance over 10,000m predicted what would
eventually happen in the marathon, because we know that the best predictor
of 10km time is peak treadmill running speed (measured in a lab-based test),
and the best predictor of marathon performance is 10km performance (much
better than VO2max or lactate thresholds or heart rate measures, for example
).
A similar thing was happening in the 5,000m event - Gebrselassie first broke
the record in 1994, and over the next four years (up to 1998), it fell by
an astonishing 18 seconds! It then took another 6 years to fall by 2 seconds
, quite clearly showing that unless a new generation of incredible runners
arrives, we're heading into a very flat part of the progression curve...
So given the explosion in 10,000m and 5,000m times of the mid-90's, the
sudden drop of the marathon world record was on the cards.
Looking ahead - is it sustainable?
So what, you ask, is the point of all this? Well, there are some important
points arising out of this observation.
First of all, the 10,000m record has stablised somewhat since 1998, and the
peak of the Gebrselassie-Tergat era. Yes, Kenenisa Bekele has entered the
fray and lowered it by a further 5 seconds, and so we are rightly excited at
what he'll do when he turns to the marathon. However, other than him, the
depth and quality of performances over 10,000m have not continued to improve
. After knocking 30 seconds off the time in four years, we've only seen 5
seconds in the next 10. The 5,000m record, meanwhile, has dropped only 2
seconds in six years, and only thanks to one individual.
Therefore, applying the same process as above, the marathon record cannot be
expected to continue falling at the same rate, with the possible exception
of Bekele, and maybe one or two new runners, as yet undiscovered, in the
next few years.
Secondly, and more important than this, you have to ask yourself the
following question: If a 26:30 10,000m runner steps up to the marathon and
is able to run 2:05:00, then what kind of shorter distance speed would it
take for a runner to do a sub 2-hour marathon?
Hopefully, you'll recognize that breaking a 2-hour marathon does not simply
happen in isolation - it is "linked" to other distances, in as much as
performance over those shorter distances predicts what happens in a marathon
. You cannot, for example, hope to run a 2:05 marathon unless you have a 10,
000m capacity quite well below 27 minutes. It's impossible to extrapolate
with precision, of course, but if you want to run a 2-hour marathon, then
you have to be running something faster than 25:30 for 10,000m in my opinion!
So the next time you ask whether a sub-2 hour marathon is possible, think of
the implications - a 25:30 10,000m time? And considering that in ten years,
arguably the greatest distance runner ever on the track and country (Bekele
) has dropped it by 5 seconds in ten years, then how long will we wait for a
runner with that kind of speed?
More obvious, perhaps is the implication of a 2-hour marathon on half
marathon times. Currently, the half marathon best stands at 58:33, by Sammy
Wanjiru. In order to see a sub-2 hour marathon, that would need to drop to
56 minutes, at least. How likely is that? 20 years? I doubt it...
The next generation: Who can advnce the marathon? The pool is shallow...
So rather than get carried away with the explosion of marathon records in
the last few years, one has to look at the pattern of transition from the
track to the road and then ask whether it can be expected to continue. I
feel that the answer is "No", because other than Kenenisa Bekele, there are
currently few 10,000m runners who possess the speed and ability to move the
event forward like Tergat and Gebrselassie have. Sileshi Sihine, eternal
silver medallist behind Bekele, is a runner who should also be capable of a
2:05 time, but not the kind of progress that is required to go under 2:03,
let alone 2 hours.
Another runner who may prove very successful in the marathon is Zersenay
Tadese. 10,000m is probably too short for him, and he seems to be a runner
more suited to the longer distances. He's already succeeded on the roads,
breaking 59 minutes in the half marathon, and winning the Great North run in
a course record in 2005. That kind of pattern suggests that he is capable
of a brilliant marathon, and I dare say he's the one man of the current
track generation who will challenge Bekele when they all run the marathon. I
would hazard a guess that Tadese is capable of a 2:04, maybe even slightly
quicker, while Bekele is a 2:03:30, or thereabouts. Quite who is going to
run 3 minutes faster than this is anyone's guess, and that's why I feel this
talk of a 2-hour marathon is very premature!
The current number 1: Sammy Wanjiru. How commercial barriers may prove
crucial in preventing record progress
Then of course, there is Sammy Wanjiru. At just 22, he is omitted from the
earlier discussion of track runners, because he made the jump to the
marathon without following the 'classic' path of focusing on track first.
That's not to say he's not a great track runner - has a 10,000m PB of 26:41,
run as a junior, and so I dare say he falls into the same caliber of speed-
runner as Geb, Tergat and Bekele one day.
In my opinion, Wanjiru is the best marathon runner in the world today. In
fact, I'd put his 2:06:32 Olympic win ahead of Gebrselassie's World Record
on a list of all-time performances, firmly at number 1.
And if Wanjiru is able to run the right race, on the right day, with the
right pacemakers, I think he's capable of the world record right now. For
that matter, so is Martin Lel, also of Kenya. Remember, Lel outkicked
Wanjiru to win London in 2:05:16, at the end of what became a tactical race
over the last 7km, and he finished with a 60-second 400m sprint! So don't
count Lel out just yet.
But Wanjiru seems to hold the aces, and I do think he's probably capable of
a 2:03:40-ish time.
Having said that, the big dilemma for all marathon-record hopefuls is "Where
do they run it?". The record is now so strong and difficult to break that
it requires the very best conditions - perfect course, perfect pacemakers,
and of course, perfect money. That happened in Berlin, and Gebrselassie
seems to have found his other "perfect" course in Dubai, where he'll get a
cool million dollars if he breaks the record again (he's running in Dubai on
January 16).
But the requirement for money, pacemakers and perfect weather and course
make it very difficult to break the record. Can you see Gebrselassie
allowing his yearly "time-trial" in Berlin to become a race for the record
with Wanjiru? I certainly can't. For three years, Geb has been Berlin, it's
basically a huge marketing campaign for sponsors with Gebrselassie's time-
trial the focal point of the race. Introducing challengers, particular with
other sponsors, hardly seems smart. The cost would be prohibitive anyway.
And so rather than facing a physiological barrier, I think that one of the
main barriers facing marathon running now is commercial - are there races
out there with sufficient prize money to draw the top names, to pay the best
pacemakers? And then of course, it can't be any race - it must be pancake-
flat with no wind and perfect weather. That's a very difficult ask, and it
means that maybe only a handful of races exist. If Wanjiru wants to win
London (or any of the other big races, like World Champs), then he cuts his
chances by half. So where then, will the record come? Forget physiology, the
biggest barrier is logistics!
All things considered - don't hold your breath for a 2-hour time any time
soon. I think it will be surprising if we see a 2:03:30 clocking in the next
ten years, and maybe then it will be Bekele or Tadese. But it will take
maybe five or six generations before we even get to 2:02, let alone 2 hours.
But then this site will hopefully still be around (we'll find someone to
take it over when we move on, our great great great grandchildren maybe!),
and so if it happens, we'll eat our words! |
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