2 New Messages
Digest #4603
Messages
Mon Aug 6, 2012 11:54 am (PDT) . Posted by:
"CoachJ1@aol.com" coachj12002
Hi Giovanni!
>I did read that article yesterday. That's what prompted me to ask you
privately for the bibliographic reference on Buckley.
My error! I already mentioned the SI article. The paper that will
explain the Weyand/Bundle position is in Journal of Applied Physiology April 1,
2010 vol. 108 no. 4 1011-1012
Title: Point: Artificial limbs do make artificially fast running speeds
possible.
Ken Jakalski
Lisle HS
Lisle, Illinois USA
[Non-text portions of this message have been removed]
>I did read that article yesterday. That's what prompted me to ask you
privately for the bibliographic reference on Buckley.
My error! I already mentioned the SI article. The paper that will
explain the Weyand/Bundle position is in Journal of Applied Physiology April 1,
2010 vol. 108 no. 4 1011-1012
Title: Point: Artificial limbs do make artificially fast running speeds
possible.
Ken Jakalski
Lisle HS
Lisle, Illinois USA
[Non-text portions of this message have been removed]
Mon Aug 6, 2012 11:54 am (PDT) . Posted by:
"CoachJ1@aol.com" coachj12002
Hi Linda!
>when other folks are feeling oxygen debt on that homestretch, how much
does he feel? does he tie up like the others if he pushes too hard
I'm glad you're enjoying the Olympics. Your question above is indeed a
good one.
One of the tests (ASR or Anaerobic Speed Reserve) that Weyand and Bundle
performed at the Rice lab determined that his speed-duration relationship
was identical to that of intact-limb runners. Hence the conclusion that he
fatigues normally as race durations increase.
That specific test (which I have used since '03 to determine speed
profiles for my high school athletes)requires the athlete to run all out trials of
different durations--from 2 seconds to 300 seconds.
When expressed in relation to these two speeds, "the all-out speeds of
runner for a trial of any distance or time (within the specified range)
follow a common curve that applies to all runners regardless of event specialty
For example, all runners regardless of event specialization maintain a
speed halfway between their top sprint and top aerobic speeds for all-out
efforts lasting 60 seconds."
So basically, as discussed in their energetics of high speed running
papers, the two speeds and a common relationship allow all-out sprint and
middle-distance performance to be predicted to within an accuracy of 3.0%.
Weyand and Bundle did not know if Pistorius would conform to this
relationship, or if his speed over the longer sprints would be greater as a result
of his prosthetics. Their results indicated that his speed-duration
relationship was "identical to that of intact-limb runners." In other words, he
fatigues normally as race durations increase.
The discussion/debate on Pistorius competing in the Games will certainly
continue. Weyand and Bundle have acknowledged this, but they do not waiver
on their position relative to his mechanical advantage.
"Thus, while the evidence leaves open legitimate scientific debate about
exactly how large the advantage of Mr. Pistorius is, there is no
scientifically reasonable discussion about whether or not he has one.
We close by noting that, in keeping with our responsibility as
researchers, what we offer is an objective evaluation of Mr. Pistorius's performances
based on the comprehensive scientific and factual history available. We
wish him every success and the continued opportunity to push athletic and
other boundaries in ways that inspire people throughout the world."
Ken Jakalski
Lisle HS
Lisle, IL USA
[Non-text portions of this message have been removed]
>when other folks are feeling oxygen debt on that homestretch, how much
does he feel? does he tie up like the others if he pushes too hard
I'm glad you're enjoying the Olympics. Your question above is indeed a
good one.
One of the tests (ASR or Anaerobic Speed Reserve) that Weyand and Bundle
performed at the Rice lab determined that his speed-duration relationship
was identical to that of intact-limb runners. Hence the conclusion that he
fatigues normally as race durations increase.
That specific test (which I have used since '03 to determine speed
profiles for my high school athletes)requires the athlete to run all out trials of
different durations--from 2 seconds to 300 seconds.
When expressed in relation to these two speeds, "the all-out speeds of
runner for a trial of any distance or time (within the specified range)
follow a common curve that applies to all runners regardless of event specialty
For example, all runners regardless of event specialization maintain a
speed halfway between their top sprint and top aerobic speeds for all-out
efforts lasting 60 seconds."
So basically, as discussed in their energetics of high speed running
papers, the two speeds and a common relationship allow all-out sprint and
middle-distance performance to be predicted to within an accuracy of 3.0%.
Weyand and Bundle did not know if Pistorius would conform to this
relationship, or if his speed over the longer sprints would be greater as a result
of his prosthetics. Their results indicated that his speed-duration
relationship was "identical to that of intact-limb runners." In other words, he
fatigues normally as race durations increase.
The discussion/debate on Pistorius competing in the Games will certainly
continue. Weyand and Bundle have acknowledged this, but they do not waiver
on their position relative to his mechanical advantage.
"Thus, while the evidence leaves open legitimate scientific debate about
exactly how large the advantage of Mr. Pistorius is, there is no
scientifically reasonable discussion about whether or not he has one.
We close by noting that, in keeping with our responsibility as
researchers, what we offer is an objective evaluation of Mr. Pistorius's performances
based on the comprehensive scientific and factual history available. We
wish him every success and the continued opportunity to push athletic and
other boundaries in ways that inspire people throughout the world."
Ken Jakalski
Lisle HS
Lisle, IL USA
[Non-text portions of this message have been removed]
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