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Press Release: Physics confirms sprinters are performing better than ever before
Quote:
In this month’s Physics World, Steve Haake, director of the Centre for Sports Engineering at Sheffield Hallam University in the UK, reveals that the men’s 100m sprint will be one event not to miss this summer.
Haake has developed something called the “performance-improvement index”, which uses very simple physics to compare the relative improvement of top athletes in different sports over the last 100 years.
The model shows that the performance-improvement index in the men’s 100m sprint is increasing at a time when those of other events, such as javelin and swimming, have plateaued or decreased.
Some of the reasons for these changes, which Haake describes in this feature, are because of technological interventions that have changed the face of the sport. The performance of javelin throwers, for example, was improving drastically up until the mid-1980s, to a point where officials were concerned for crowd safety.
At the time, javelins would float to the ground and land flat, meaning it was very hard to tell where the tip had hit the ground. As such, the International Association of Athletics Federations (IAAF) changed the specifications of the javelin itself, moving its centre of mass towards the tip by 4cm and so forcing the javelin to land on its tip, thus reducing throwing distances by about nine metres.
Haake also describes the step-change in the men’s 100m in the mid-1970s with the introduction of fully automated timing.
In swimming, an unprecedented 25 and 47 world records were broken in 2008 and 2009, respectively, with tight-fitting, full-body swimsuits seen as the main reason.
The swimsuits, which have now been banned by swimming’s ruling body (FINA), were relatively tight and reduced the cross-sectional area of the body by pulling it into a more cylindrical shape, thus reducing drag. They were made from polyurethane, which also affected the way the water flowed over the body.
As Haake writes, “One way of finding out how exactly technology affects sporting performance is to examine the physics involved. We can then try to quantify the effect of technology on sporting events – and find out whether it really is all about the equipment.”
Re: Physics confirms sprinters are performing better than ever before
Quote:
Originally Posted by NewsBot
Press Release: Physics confirms sprinters are performing better than ever before
Don't really know why you need "physics" to understand that a smaller time on your stopwatch means the sprinter is "performing better than ever before"?!
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Sincerely,
Kevin
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Kevin A. Kirby, DPM
Adjunct Associate Professor
Department of Applied Biomechanics
California School of Podiatric Medicine at Samuel Merritt College
Re: Physics confirms sprinters are performing better than ever before
The whole abstract seems a little confused if not confusing.
What is the performance-improvement index as far as world or other records, for any sport where performance is measured by time, are concerned?
Would one index be the current record time (r) divided by the difference between that record time (r) and the new record time (R)
ie performance-improvement index = r/(R-r)
in which case the smaller the index the greater improvement in the performance?
That, in itself is arithmetic, mathematics, statistics but not physics.
Does the physics come into it by attempting to give an answer to how whatever has changed in the environment between one record and the next contributes to the change in performance level?
Lets hope the article is more clearly written than the abstract
Bill
PS Maybe the title should read: Physics confirms why sprinters are performing better than ever before
Physics confirms sprinters are performing better than ever before
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