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Is there a limit to athletic performance?

We once thought no-one could run a mile in less than four minutes – and yet the current world record stands at three minutes, 43 seconds. So will records keep tumbling as people get fitter and technology…

Ceilings on physical ability are there – sometimes – to be broken. EPA/Hannibal

We once thought no-one could run a mile in less than four minutes – and yet the current world record stands at three minutes, 43 seconds. So will records keep tumbling as people get fitter and technology takes off? Or is there a limit to human performance?

For physiologists, human performance is limited by the processes involved in energy production and muscle contraction.

Performance in a 100m sprint depends on many processes, including the rate at which energy can be produced and used, the speed at which electrical signals can reach muscles, and the rate at which calcium can initiate muscle contraction and relaxation.

Roger Bannister beat the four-minute mile in 1954

By comparison, marathon performance is dependent on the ability to use oxygen, store and use fat and glycogen for energy, and to keep muscle calcium levels high to maintain contractions. In hot conditions, the ability to sweat is also important for endurance performance.

Based on current knowledge, there should be a limit to these processes, and therefore a limit to human performance. But athletic performance does not depend solely on physiological processes, and improvements in other factors have helped us to far exceed the limits previously placed on human performance.

Causes of athletic improvement

Other factors contributing to athletic performance include psychology, nutrition, training methods and technology. Over the past few decades, leaps and bounds in each of these areas have advanced athletic performance.

Technology is constantly evolving. In swimming, there have been major advances in the design of Olympic swimming pools, reducing turbulence and improving performance. Olympic pools are now deeper, have ten lanes instead of eight, and anti-wave lane ropes.

AAP Image/Delly Carr

But it was the advent of “super suits” (pictured above) in 2008 that caused the greatest improvements in performance. The super suits used polyurethane material to reduce drag and improve buoyancy: 255 world records were broken during the two years they were deemed legal.

The suits enabled swimmers to sit in a higher and more streamlined position in the water, and took away the advantage held by swimmers such as Michael Phelps, who naturally sat higher in the water. The suits were finally banned in 2009; but world records set by athletes using super suits have been allowed to remain.

As a result, world records since the super-suit era have been, and will continue to be, few and far between.

Doping and performance-enhancing drugs have been obvious contributors to improvements in athletic performance. As our knowledge of the human body and the processes limiting athletic performance increases, so does the ability to illegally alter these processes to enhance performance.

Gene therapy is now being used to treat diseases associated with muscle wasting and weakness, but it may also be exploited to enhance athletic performance.

Constant improvement

Whether a ceiling to athletic performance will ever be reached depends on many variables, discussed below:

1) The first of these is the type of event. In sprint events - where physiological factors are the main determinant of performance - it’s possible we’ll one day reach a ceiling of human performance.

Doping has been a notorious presence in professional cycling. EPA/Nicolas Bouvy

But this is based on what we currently understand about the limits of physiological and biomechanical performance. There’s a lot about the human body that we still don’t understand, and improvements in our knowledge may reveal new limits to athletic performance.

Performance in endurance events doesn’t just rely on physiology and biomechanics. Because other variables are continuously evolving, it’s likely to take longer for a ceiling to be reached on endurance performance. We may never get there.

2) The answer also involves technology and the limits that are placed on technological advancements. In sports that rely heavily on technology – such as swimming and cycling - a ceiling might not be reached if limits are not placed on the magnitude of performance enhancement that new technology can bring.

3) A third variable involves doping and other illegal performance-enhancing practices. The success of the fight against doping depends on scientists' ability to come up with tests to detect doping.

This can be problematic when the doping involves manipulating proteins that are normally present in the human body. As long as the authorities remain one step behind those developing the latest doping technologies, it will be difficult for a ceiling on human performance to ever be reached.

Usain Bolt has broken numerous world records since 2008.

4) Finally there are athletes, such as Usain Bolt, who have a physique and running technique we have never seen before, and all of the ceilings that we put on normal physical ability are simply thrown out the window.

There is no doubt improvements in athletic performance have slowed down; but with athletes such as Bolt, and advancements in technology and our understanding of the human body, a ceiling to human performance still seems a long way off.

Join the conversation

8 Comments sorted by

  1. Mat Hardy

    Lecturer in Middle East Studies at Deakin University

    Are there limitations posed by anatomy and the endurance of human tissue as well? When I see road cyclists, for example, I always wonder whether the human knee was ever meant to deal with that many rotations in such a short span of years?? Ditto the impacts that gymnasts must bear on their wrists, knees and ankles. (Especially give the age of the girls in particular. They must be crippled by the time they're 20!)

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  2. Peter Ormonde

    Farmer

    Is there a limit to athletic performance? Yep - synchronised swimming.

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  3. Anthony Nolan

    logged in via email @hotmail.com

    The only limit to athletic performance of significance to me is the limit of my interest.

    I'm far more interested in the reaction against Dow Chemical as sponsor to the Olympic Games (http://www.mlive.com/business/mid-michigan/index.ssf/2012/07/protests_continue_against_dow.html) than in some monomaniac the sum total of whose human accomplishments is shaving micro-seconds from a run or swim or jumping further than anybody else.

    Critical political commentary on the Olympics would be appreciated if possible. Here's a suggestion: only nations who meet specific democratic standards should be able to attend. Here's another: nations at war should be automatically barred from competing.

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    1. Bob Constable

      logged in via Facebook

      In reply to Anthony Nolan

      only problem Anthony is once you start trying to determine democratic standards, you have to metricate the standards. What is standard in Australia is not standard in the middle east, Asia, or eastern europe.
      Similarly determining nations at war. Would you exclude those middle eastern countries that have vowed to push Israel into the sea. Would you have excluded Britain and Eire during "the Troubles" etc etc

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  4. Paul Savage

    Theme Leader, Biotechnology at CSIRO

    Is there a limit to athletic performance? Yes. We know from the mathematics of sequences and limits that every upper bounded sequence has a limit. Hence, for example, since the fastest time in the 100 m sprint has an upper bound (zero seconds), it must have a limit. Over time, all records will asymptotically approach a limit unless some variable is altered to cause a step change in performance (like the swim suits) and then the records may jump a little then approach a new asymptote. But even this…

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    1. Matthew Taylor

      Lecturer in Biomechanics at University of Essex

      In reply to Paul Savage

      Interesting website....of course the 100 m fig (fig 2) is pre-Bolt. The world record now for 100 m is 9.58 s. Fig 2 suggest the limit is 9.48 s reached in 500 years time...I have a sneaky feeling a sub 9.5s may happen in our life time - if not the next few years ! But your right, predicting limits is interesting but pointless.

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  5. Sue Ieraci

    Public hospital clinician

    Is there a limit to athletic performance?

    No. One day, runners will be arriving at the finishing line beore they start.

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    1. Peter Ormonde

      Farmer

      In reply to Sue Ieraci

      Now don't you start all that up Ms I... you'll just encourage the physicists.

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