Welcome to the Science of Sport, where we bring you the second, third, and fourth level of analysis you will not find anywhere else.

Be it doping in sport, hot topics like Caster Semenya or Oscar Pistorius, or the dehydration myth, we try to translate the science behind sports and sports performance.

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Thursday, December 31, 2009

Favourite videos of 2009

Bringing the curtain down on 2009:  Two great "alternative" sports videos

One final post for 2009, to bring the curtain down on a great year.  These are my two favourite alternative sports videos of the year, for you to enjoy as the curtain comes down on a great (and controversial) year in sport.  It's easy to be bogged down in the detail and to overlook the remarkable, which I hope these videos capture to some extent.

Remarkable balance and control - bet you don't use your bike for this

First up, a video that we featured in April this year, showing Danny Macaskill, a trials rider, showing some skills over a period of a few months in Edinburgh.  Everything about this video - the skill, the setting, the soundtrack (a song by Band of Horses called "Funeral", for those who are interested), the editing, is just breath-taking, and it's my favourite video of 2009.



Extreme sport video of the year

Next, a video of extreme sport - wingsuit jumping.  What is most incredible about this is how difficult it must be to learn it.  Learning a sport like golf or tennis is difficult, sure, but there's a very set process by which you improve, systematically acquiring skill, practicing, obtaining feedback and then improving.

An activity like this, there is one chance.  I can't get my mind around how remarkable the process is by which these guys learn to do this.  I assume these men all begin as sky-divers, evolve into base-jumping and then eventually graduate to 'buzzing the walls' while wearing outfits that you'd expect to see in a sci-fi movie.  The penalty for miscalculation is severe, and the opportunities to experiment limited, and these men are right on the limit of extreme.  It's quite incredible.  Enjoy!



And on that note, a final thank you to everyone for reading, contributing and supporting us on The Science of Sport in 2009!


We hope that 2010 brings more of the same, and we'll do our very best to keep covering it!


Happy New Year, everyone!


Ross

Number 1: Caster Semenya

Number 1: Caster Semenya's saga

Less than a day remains of 2009, and we've spent the last week recapping the biggest sports science stories of the year.  And it comes as no surprise that the number 1 science of sport story of the year is that of Caster Semenya.

There is little more that can be written about Semenya, so intense was the media spotlight on her during a two month period following her world title in Berlin.  In fact, more has been written than she would have ever wanted, following what was a meteoric rise to the top of the world - at the start of 2009, her personal best was 2:04, and within 8 months, she had cleaved 9 seconds off that and ascended to the summit of women's 800m running with one the most dominant performances seen at the championships.  To revisit our very first post on the Semenya story, written the day the leak was first reported, click here.



However, the real story was only just beginning.  The night before that final, the first reports emerged that the IAAF had begun an investigation into Semenya's gender.  A media firestorm erupted, punctuated by the finger-wagging (and now revealed as deceitful) president of Athletics South Africa, Leonard Chuene, who, backed by other politicians here in South Africa, managed to turn the issue into a racial and political one overnight.

We would eventually learn that this was done deliberately, and 'pre-empted' the announcement of any testing on Semenya.  A local TV show, 3rd Degree produced by Debra Patta, revealed that Athletics South Africa DID in fact know of the controversy surrounding Semenya BEFORE the World Championships and had even received an expert medical opinion that she should be withdrawn from the race.  They refused, instead telling the IAAF in a hastily arranged meeting that they would "Oscar Pistorius look like a picnic" compared to the fallout if Semenya was not able to run.

The science of sex verification

The drama continued when the team arrived back in South Africa.  Political leaders threw their weight behind Semenya, telling the world to pull down her pants to check, since it was, after all, this easy.

Scientifically, it was anything but.  We did a series of posts trying to clarify why sex verification was in fact not so simple.  The issues and some explanation can be read in this post, for those who are interested in learning more (and didn't learn more than they ever wanted to in September this year).  Incidentally, I also co-authored a scientific paper on this topic with Prof Malcolm Collins, which will be published next year, and am working on another such paper for a journal next year, for those who want the journal article version (and will wait a while...).

To sum it up, the simple biology that a male has an X and Y chromosome which directs the development of testes, while females have two X chromosomes which result in the formation of ovaries, is rather oversimplified.  Any number of 'errors' can occur, either genetically or hormonally, resulting in XY females or XX males (or XXY mosaicism, or XY mosaicism).  Each condition, termed a Disorder of Sexual Development, is complex and has far-reaching effects on the physiology.  Some are incompatible with athletic performance, whereas others may confer performance advantages.

That performance advantage lies mainly in the effects of the hormone testosterone - known as the 'male hormone', it is produced by the testes and is responsible for, among other things, muscle and skeleton development.  Semenya's muscular appearance, along with hirsutism (hair growth), deepening of the voice and skeletal structure all pointed towards such a condition in her case.

Simple science, complex interpretation and no value of experts in SA

Ironically enough, as complex as this physiology is to interpret, it's actually remarkably easy to obtain a fairly accurate picture of an individual's biology.  I was fortunate enough to get in touch with a few experts in genetics and endocrinology, and within minutes, the entire picture was made clear.  No need for textbooks or scientific journals - an endocrinologist will tell you instantly what the typical female levels of testosterone are, how various conditions may affect it, and how this may influence muscle and skeleton development.  This is not so complex an issue that it is unsolvable - the legal implication of the biology is certainly complex, but knowing it is not.  And this is the reason that officials in South Africa should be held to account for their willful ignorance of the facts, and the complete and utter disdain for expertise.

Leonard Chuene publicly announced that he would not accept the opinion of a "scientist from some stupid university", which tells you all you need to know about the now former president of ASA.  Meanwhile, the Minister of Sport, our highest ranking sports official, declared that the questions about Semenya meant nothing.  His words? "That means nothing. There are many hermaphrodites in the world so what does it matter. This girl is running as a girl who has been accredited as a girl. Nobody has questioned that  (this comes after the whole world was questioning it, I might point out). She doesn’t have a womb, so what?". 

He went on to declare that if anyone tried to take her medal or stop her from running, it would be the "Third World War".  I was embarrassed to be South African, and wrote as much, for which I received a letter from the Minister saying that if I knew something he didn't, I should say so.  Perhaps the Minister will in future consult an expert endocrinologist, geneticist or doctor?  Or maybe he'll even read this website in 2010...


The origins of the investigation - reports, rumour and requested tests


It eventually transpired that the investigation from the IAAF began as a result of Semenya's physical characteristics, PLUS reports in South Africa of her gender being questioned, PLUS the magnitude of her performance improvement - 9 seconds in a year is possible, but when it takes an athlete from 2:04 to a top-20 of all-time performance, then it is suspicious.  A good high-school male athlete, for example, could reasonably expect this jump in a year.  An elite female?  It was cause for concern, and the IAAF began prodding around for some facts.

The rumors from within SA were interesting.  Inside athletics circles, it has been widely known for about three years that all was not well with Semenya.  In fact, three years ago, at the SA Junior Championships, ASA officials informed all competing teams that they knew of the problem and were investigating, so they should please not lodge any protests.  Needless to say, nothing was done, until the IAAF acted on these reports, and requested an investigation from ASA (which is what they should do, according to their own policy).

ASA complied, under the guise of doping control, and Semenya found herself undergoing invasive physical examinations in South Africa, a few days before the team left for Berlin.  Those results were enough to cause the ASA doctor, Harold Adams, to request that Semenya be withdrawn from the team.  We may never know what was found by those tests.  However, it is relatively easy to perform physical exams to confirm that an individual possesses no womb and has ambiguous genitalia.  Genetic testing would follow and the picture would become clear very quickly.   I would be very surprised if ASA did not know everything at that point.  However, they refused to withdraw her, and the rest is history.

If all this was not bad enough, the IAAF then decided that if ASA would provide them with the results of the investigation, they would perform their own, and so Semenya underwent a second round of testing, this time in Berlin.  This investigation should have remained confidential, but was leaked to the media.  To this day, I do not know the source of the leak, but it seems to have come from within the IAAF, and it has resulted in the greatest invasion of privacy of any athlete I can imagine.  Semenya has not been heard from since her arrival back to South Africa, first retreating to her home in Limpopo and then writing exams (though she eventually had them deferred) under the care of the University of Pretoria.

The facts dry up as the IAAF close up on Semenya

The IAAF have pretty much retreated themselves, bitten not once but twice by a leak.  The second one coming a few weeks after the race, when a reporter in Australia, Mike Hurst, obtained information that Semenya was a "hermaphrodite" who possessed testes.  It was the wrong word (offensive as well as inaccurate), but it seemed that much of the content report was accurate, and Semenya's position in the spotlight was sealed.

The leaks have also had an indirect effect on how information will flow from now on.  The fear of future damages have set up a firewall of protection around Semenya, which means that we may never know the outcome of the case.  The medical results will not be announced, which is correct, since these are private.  The problem, however, is that Semenya may wish to continue to run.  If she does, then a hard decision must be made - one option is that she is allowed to run in her current situation, which will require that everyone be informed of just what her physiology is.

Alternatively, she'll be barred from competing until she has surgery to remove the alleged testes.  If this happens, the world would still need to be informed, because Semenya's presence on the international scene would demand answers to these questions.  No athlete, sponsor or meeting organizer would entertain the idea of inviting her unless the air was properly cleared, and so at some point, facts must be disclosed.  What we have seen is that the media want the truth, and will dig for it, resulting in many false or inaccurate claims, and I would suggest that the only way to control this is to manage the information before it leaks.  Whether that happens or not, 2010 will tell us.

The closing point then is that this story is nowhere near finished.  2009 may be drawing to a close, but Semenya will be a name heard again in 2010, without a doubt, though quite what the context will be, no one knows.

Ross

P.S.  Incidentally, the piece on Semenya brought us the most comments we've ever received for a post, and so I'd like to end of the year by thanking everyone for their inputs, even the highly critical!  As I've said before, we don't aim to have the last word, but rather to start the debate and present our thoughts, and to all who have contributed to this and all the other issues (cycling, Tour de France, doping, Pistorius and Bolt), thank you and have a wonderful New Year's Eve!

Wednesday, December 30, 2009

Number 2: The cleansing of swimming's record books

Number 2:  Swimming's technology debate as the ban approaches

Swimming went through a frantic year in 2009.  It featured the showpiece of the sport, the 13th FINA World Championships in Rome, but it was dominated by an ongoing pursuit of world records, powered by swimmers wearing high-tech swimsuits that arguably contributed to the biggest rush of records in the history of the sport.

And record rushes are nothing new to swimming - because swimming is such an inefficient activity (even for the elite), any changes that make even a tiny difference to efficiency (which we'll define as the speed in the water for a given force of muscle contraction, as poor a definition as that is), make a big impact on swimming times (a relatively larger impact than on sports like running or cycling).

For example, deeper swimming pools, wash-off areas that prevent the return of waves from the side walls, and full length body suits have all contributed to step-wise reduction in records.  You see this if you look at the progression of records - periods where little happens, followed by a sudden spate of records, then dormancy, eruption and so on (for example, the introduction of swimming goggles some 30 years ago allowed swimmers to see the wall and spend more time in the pool training, causing a sudden drop in times).

However, 2009 introduced a new character, or villain - polyurethane.  First introduced in 2008 by Speedo in its LZR Racer, the first generation suit was developed in collaboration with NASA and the polyurethane was reported to have zero resistance in wind tunnel tests.  The LZR Racer shook up the Beijing Olympics, helping its swimmers to 25 records in the Cube pool.

2009 and the stakes are raised

Other manufacturers were not taking this lying down - pretty soon, the LZR Racer, which consisted of normal fabric with panels of polyurethane material, had spawned a new generation of swimsuits, entirely made up of polyurethane.  Arena, Jaked, TYR all came to the party, and the swimmers duly did the damage to the records, particularly in the faster, less turbulent events - freestyle and backstroke (the breaststroke is too slow for the hydrodynamics to have a huge effect, while butterfly is very turbulent, which somewhat reduces the impact)

Rome, for example, produced an astonishing 43 world records.  The previous record had been 29, back in 1976 when doping was the likely driving force.  Out of 20 men's events, 14 world records fell.  On the women's side, it was even higher - 17.  The result was that on the day that the curtain fell on Rome, the average age of men's world records was 198 days, while women's records were 79 days old.  The table below summarizes the age of the records.



Changing the nature of competition?

On a more micro-level, upsets and unpredictable results were the order of the day, and this was one of the problems with the suit - it cast doubt on whether a race outcome was 'genuine' or assisted by technology, and that is good for no one.  Not for the swimmer who is beaten, the swimmer whose world record is broken, or for the new champion, whose title is forever marked by an asterisk indicating "soon to be illegal suit".

Two such swimmers were Michael Phelps and Paul Biedermann.  Phelps you know - no introduction needed.  Biedermann is not as well known.  The German swimmer was previously an Olympic finalist, but while Phelps was rewriting the record books in Beijing, he was, in a manner of speaking, filling a lane alongside the record act.

One year later, he improves by 4 seconds and claims the world title over 200m and the world record of the greatest swimmer ever, amidst claims of unfair result and lucky win.  The problem is - he may have deserved it.  Phelps did swim slower than in Beijing (by 0.22s) and Biedermann's improvement is large but not impossible.  Perhaps in an 'equal race', the result would have been the same?  But we'll never know, and the technological imbalance created by the swimsuit wars means the result will forever be questioned.

FINA acts, eventually- the 2010 ban


FINA, the sport's governing body, eventually acted, deciding that all suits would be banned from January 1st, 2010.  This means, of course, that there are two days left in this era of swimming.  Then it's back to the pre-2000 suit - knees to navel for men, knees to shoulder straps for women, and polyurethane will be condemned to swimming history.

Part of the problem for FINA was that eventually, the voice of dissent became so loud that they had to act.  Swimmers like Phelps, through his coach, began to threaten to boycott races given the debacle, while others voiced their displeasure, mainly because sponsorship restrictions (and loyalty) prevented swimmers from racing in the 'best suits'.  And while many will question this, I can certainly relate to the swimmer's predictament - remember, these are swimmers, not football players, basketballers, or golfers, where sponsorship earnings can be enormous.  For a swimmer, it's often the suit manufacturer alone, and so the commercial problem on the ground was disproportionately large.

For FINA, the signs were there in early 2008, but they were slow to act.  At that stage, Arena had tried to have the Speedo suits banned, but FINA held firm and Beijing was a Speedo showpiece.  The wheel turned and Speedo then found itself on the receiving end.  I wonder what the commercial incentives might have been for FINA, given that Speedo are their partner sponsor?

There is also a cost issue - at hundreds of dollars per suit, and given that the suit lasts only a handful of races, many decried the impact it would have on the development of the sport.  In my opinion, this was not a great factor - it's easy to ban high tech suits for swimmers under the age of say 16, and ensure equal races.

To me, the bigger issue is the equality of competition - are we seeing an equal race between swimmers, where the technology has a negligible impact on the outcome of the race?  For tennis, and running, that is the case.  For swimming, it did not seem to be, making swimming in 2008 and 2009 resemble Formula 1, where the equipment has a bigger impact on performance than the natural difference between swimmers.

In any event, the suit will soon be a thing of the past.  Some have said that the only thing worse than allowing this technology is allowing it for a while and then banning it.  Time will tell, but certainly, the days where 100 or more records fall per year are gone (I'll be honest, I can't even remember how many records have fallen since the start of the revolution.  I'd guess close to 200, but I've lost track)

The number 1 story is to follow!

Ross

P.S.  Below is a post which collects some of the posts we've done in 2009 on some of the bigger stories of the year.  You'll be able to find this summary using the tabs on the top of the page - "2009 highlights" is the label to use to find this page if you're interested.

2009 news stories

2009 produced some fascinating sports stories. Below are links to our coverage of those top stories of 2009

Caster Semenya - male or female? The big debate of 2009

Swimsuit drama - records are meaningless
Oscar Pistorius in the news again - the scientific evidence for and against
The Tour de France 2009 - controversy over the limits to performance and power analysis