and Female Sports
This page assumes that a reasonable definition
is a "competitive
Genetically "XY" men are on average bigger, stronger and faster than genetically "XX" women due to their many physical differences. As a result men tend to be significantly better than women at sports, as demonstrated by the following 2014 world records:
These records show that men have about a 11% advantage in running events and more than that others. Basically millions of men can beat the very best woman in the world in most sporting events.
Sports and Tranwomen
It seems reasonable that if a MTF transsexual is living as woman, is legally a woman, has a passport stating 'sex: female', and is married as a woman - that she should be able to compete in sports as a woman. But some people - even some transsexual women - have severe reservations about the fairness of allowing this. For example, if the world record holder of the men's 100 metres race had a sex change and two years later set a new world record as a woman - should that really count? The closest known example of this happening is when in 1975 a 6 ft 2 inches tall, 40 year old, an American eye surgeon and amateur tennis player called Dr Richard Raskind had SRS and became Renée Richards. After a legal fight, in 1977 she won the right to compete in women's professional tennis. In 1978 she reached the women's quarter-finals of the US Open tennis championship and in February 1979 - at the amazing age of 44 - was ranked the 20th best female tennis player in the world. Even Renée subsequently expressed doubts about the fairness of this.
Another factor - if rarely openly mentioned - is that women's sport has become financially very lucrative. Top female competitors in sports such as tennis, golf and athletics can earn more than $1 million a year in prize money and sponsorship deals. As a result female sporting associations are desperate to develop rules that on the one hand are fair (and legal) in allowing male-to-female transsexuals and genetically 'XY male' intersex individuals to compete as women, but on the other prevent men or transsexuals with excessive physical advantages competing as women. I.e. they are trying to square the circle!
Upon investigation, the difference in performance is best explainable by the substantial list of physical differences between men and women - even if we only consider factors directly related to sports.
Males typically have greater bone strength and density, greater muscle bulk and broadness in the shoulder area, and greater subcutaneous fat in the upper half of the body. At maturity, females are generally shorter in height, have more flexibility in their joints, have more delicate ligaments and tendons, have more subcutaneous fat in the hips and lower body regions, have less erythrocyte and haemoglobin mass (which directly affects the ability to of the blood to carry oxygen and get rid of carbon dioxide), and exhibit a greater degree of pelvic tilt and obliquity. The female elbow offers a greater carrying angle and tendency toward cubitus valgus (i.e. the lower arms stick out more), and the female has smaller lungs, heart, liver, and kidneys than the male. Female joints are more subject to injury in sports requiring an expulsive effort, sudden stopping, sudden checking of speed and turns, and landing in jumps. These differences are partly to the man's X chromosome, and partly due to the fact from about age 13 the bodies of boys are powerfully influenced and "masculinised" by a flood of testosterone from their gonads, while simultaneously the growth of girls is actually limited and "feminised" in a more delicate direction by the flood of oestrogen's from their ovaries.
According to one US Army manual:
What the Army study does not really emphasise directly is the fact that the "typical" young untrained male has an absolute oxygen intake (termed VO2 max) of 3.5 litres/min, while the typical same-age female has about 2 litres/min - a 43% difference which translates in to reduced performance and increased fatigue. The difference reduces to 15 to 20% when the difference in body weight is allowed for, but is not eliminated.
Part of the reason for the V02max difference is that the male sex hormone testosterone promotes the production of haemoglobin, an oxygen-carrying protein found inside red blood cells, and testosterone also increases the concentration of red cells in the blood. The female hormone oestrogen has no such effect. As a result, each litre of male blood contains about 150-160 grams of haemoglobin, compared to only 130-140 grams for females. The bottom line is that each 'male' litre of blood can carry about 11% more oxygen than a similar quantity of female blood.
If we compare average body fat in males and females, we find the other part of the answer. Young untrained women average about 25% body fat compared to 15% in young men. If we factor out body composition differences by dividing VO2 by lean body mass (bodyweight minus estimated fat weight) the difference in maximal O2 consumption decreases to perhaps 7-10% - close enough to 11% difference in blood carrying capacity just calculated. But this is a theoretical paper exercise as a female athlete cannot reduce her body fat down to the sub 7% levels often observed in elite males without severe consequences to her health that would soon rule her out of competition anyway.
Transwomen and Sport
The table below shows the relative advantage that a genetically XY transsexual woman may have in sports over a genetically XX cis-woman. It is rather speculative, but is supported by the limited research available. For example one study found that androgen deprivation in MTF transsexuals increases the overlap in muscle mass with women but does not reverse it.
It has been suggested that transsexual women who have SRS after puberty are actually at a disadvantage in sports compared with other women as they are lugging around the large and heavy skeleton of a man without the compensations such as big muscles. Alison Carlson:- "A man who's castrated and takes oestrogen therapy loses a lot of strength advantages. With someone like Renee Richards [see below], she didn't suddenly become this winning player on the women's circuit. In fact, she didn't do that well, because although she was tall, she actually had female musculature being carried around on a large male skeleton. It weakened her." Personally I'm not quite sure that the overall balance and weighting of advantages and disadvantages agree with this view - although it does depend on the sport.
Complete AIS is sometimes presented as the ultimate form of male-to-female transsexual - the suffer is genetically male XY but has a completely normal female body (albeit lacking internal reproductive structures) due to the total inability of their bodies to use the male androgen hormones produced by their testes in anyway, including for muscle development or VO2max. But a very interesting paper "Complete Androgen Insensitivity "Syndrome": A Model For Human Performance in Sports". does nothing to support the suggestion that AIS women, or indirectly male to female transsexuals have no advantage in women sports.
The potential scale of the men-competing-as-women problem first became apparent after the 1932 and 1936 Olympic Games. The Polish sprinter Stanisllawa Walasiewicz (later Stella Walsh) was the winner of the 100-meters at the 1932 Olympics, but the IOC recovered her medals after learning that she had male reproductive organs. A post-mortem in 1980 revealed that she had male genitalia as a result of a rare genetic condition called mosaicism. Even worse, the German high jumper Dora Ratjen came fourth in the 1936 games - in 1938 it emerged that "she" was actually a transvestite man called Hermann Ratjen. The IOC was further worried to learn that three other track-and-field champions who competed as females in the pre-WW2 games eventually underwent reconstructive surgery to remove external, male-like reproductive structures.
After WW2, sport became increasingly super-power politics by other means. The masculine physique, deep voices and five o'clock shadow of some formidable Eastern bloc female competitors became impossible to ignore, and after the 1964 Olympic games. it was decided to introduce sex tests.
Sex testing officially began at the 1966 European Athletics Championships in Budapest. This was a simple visual exercise - women competitors were required to disrobe so that medical staff could from their genitals whether they were indeed women. Of course, many women found this offensive, but it was also noticeable that several dozen female competitors immediately faded from the scene, most notably the rather masculine Press sisters Tamara and Irina from the Soviet Union - who between them won five Olympic titles in the shot-put and hurdles respectively in the early 1960's.
It was soon realised that sex reassignment surgery had already advanced to stage where a former man could pass a "peak and poke" test as a woman, therefore at the 1968 Olympics the far more sophisticated polymerase chain reaction (PCR) buccal smear test was introduced to examine the competitors chromosomes - with the blunt rule that if they weren't XX she couldn't compete as a woman. Ewa Klubukowska, a 1964 sprint bronze medalist for Poland, had the dubious honour of being the first woman to fail the sex test on account of possessing an XXY chromosome pattern, although she was clearly female in every other way. "I know what I am and how I feel" she said at the time. After failing her "female" sex test, Ewa made it a bad joke by getting pregnant and having a baby the next year, although on the side of the coin Austrian skier Erika Schinegger (Women's World Downhill Champion in 1966) decided to become Erik after failing her sex test - and later fathered a daughter. Ewa and Erika were in crowded company at the time, as many other female athletes, including five British, failed the new test in its early days.
From the start the fairness of this gender verification test was hotly disputed, the vast majority of the women affected suffered from Complete AIS (CAIS) and are legally regarded (and regard themselves) as women. Things came to head in with the Spanish hurdler Maria Jose Martinez Patino. She suffered from AIS, i.e. had male XY genes, but in 1983 she mistakenly passed a sex test and was certified as XX female. However the now 24-year old was retested when she entered the 1985 World University Games in Kobe, Japan. On the way to her first race, she was told that she was genetically male and should fake an injury and withdraw (apparently a common practice when a sex test was failed) - if she didn’t it would be leaked to the press that she was a man. She didn’t back down and she won her race, collapsing with physical and mental exhaustion after the finish line. The next day, her story was front page news. She returned to Spain to be stripped of her titles and lost her university scholarship and her boyfriend. Patino told a reporter “I knew I was a woman in the eyes of medicine, God, and, most of all, in my own eyes ... If I hadn’t been an athlete, my femininity would never have been questioned".
The Olympic Games organising committee started to face huge pressure from all sources because of the obvious mistakes (so called "false positives") that were being made in relation to sex testing, which potentially ruined the lives and careers of some women athletes. Exemptions began to be made, starting in the 1988 games with Maria Patino herself.
However genetic testing continued, and this still affected many female athletes. Between 1972 and 1984, thirteen women "failed" the Olympics' chromosome test and were barred from competing. Like Maria Patina, the vast majority were women that suffered from partial or complete Androgen Insensitivity Syndrome (p/cAIS):
Between 1972 and 1990, one in every 504 elite female athletes was found ineligible as a result of sex chromatin testing yet not one was found to be a "normal male". This statistic is still interesting as almost all disqualified athletes had from AIS, but only about 1 in 3500 women suffer from the syndrome, i.e. a genetically XY woman with AIS is roughly seven times more likely to become an elite athlete than an XX cis-woman.
A New Era
Mandatory sex testing for women gender was finally abandoned for the 2000 Sydney Olympics, but unfortunately considerable publicity was still given in the media to two Brazilian women - Judo competitor Edinanci Silva and volleyballer Erika Coimbra - when it was leaked by someone to the press that they were born hermaphrodites, with non-functioning male genitalia which had been surgically removed. It seems likely from the reports that Erika has a form of AIS.
Although "gender verification test was dropped before the the 2000 Olympics, there remained a question outstanding about whether sex-reassigned individuals could compete in their new sex.
In February 2004 an IOC advisory group recommended that individuals undergoing sex reassignment after puberty could compete in the Olympics, but only under certain conditions:
On Monday, 17 May 17 2004 transsexuals were formally cleared to compete in the Olympics by the IOC Executive Board. IOC spokeswoman Giselle Davies said the situation of transsexuals competing in high-level sports was "rare but becoming more common." IOC medical director Patrick Schamasch said no specific sports had been singled out by the ruling. "Any sport may be touched by this problem," he said. "Until now, we didn't have any rules or regulations. We needed to establish some sort of policy."
The decision, which covered both male-to-female and female-to-male cases, went into effect starting with the Athens Olympics in August 2004. The new rules allow the classification as female of men who underwent the SRS operation before or after their puberty.
The decision of the IOC to let transsexual women compete as female athletes, and a similar decision by the International Athletics Association (IAA) seemed to usher in a new era. There was no doubt that some Olympic events (e.g. running, javelin, pole vault, marshal arts ...) and many professional, semi-professional women's sports such as tennis, golf, football (soccer), basketball, bowling, running et al seemed to face a gradual influx of top ranked women who were transsexual.
Michelle Dumaresq became an early example of the apparent future. After her sex-reassignment surgery in 1995 she claims to have lost bone density, three inches of height [which is extremely unlikely], and 30% of her muscle mass along with her testosterone, but nevertheless she still became the Canadian women's downhill cycling champ in 2002 - just a year after entering the sport. Michelle also mentions receiving e-mails from three transwomen who were about to qualify for the 2004 Olympics.
Renee Richards (who has some regrets about her own transition and SRS) believes that it all comes down to fairness. Renee would bar transsexuals from women's sports if they were in their 20s and still had muscular male physiques that gave them an advantage over other women:
But Renee has also warned that the decision by the International Olympic Committee means that unscrupulous competitors could use the new rules to change from men to women to give them more chance of success.
Putting things in a UK context, the new reality is Tim Henman could become Tina Henman and be a [female] Wimbledon champion at last. With Henman’s strength and speed, height and muscle density, added to his skills, it would be a near certainty even after year of female hormones and aging.
But a counterview to Renee is offered by Kia Siadeski, a transsexual woman whose passion is Barrel-racing - a women only sport. She says: "I'm 5'5" and weigh 112 pounds - I have no strength advantage, never did. Not that strength is needed in barrel-racing, anyway - 75% of the sport is about the horse. But half the women I compete against are bigger and stronger than I am". But when news of her sex-change got out, she lost her championship.
Indeed, Renee argues against the theory that desperate athletes will do anything to win the gold, even change their gender. "How hungry for tennis success must you be to have your penis chopped off in pursuit of it?"
... and then Caster Semenya burst onto the scene.
A junior champion in 2008, the South African teenager took seven seconds off her personal best for 800m over the next nine months, breaking the South African record and setting a world-leading time in the process. The International Association of Athletics Federations (IAAF) felt "obliged to investigate", if only to rule out doping. Hours before the start of the 800m final at the 2009 World Athletics Championships - a race Semenya would win by a huge margin - it was leaked that the sport's governing body had also asked for a gender test. The findings of the test were never released but she was cleared to compete again in women's athletics, and she was chosen to carry her country's flag during the opening ceremony of the 2012 Summer Olympics in London.
What ever Caster's circumstances, she seems to have triggered increasing reservations at governing bodies such as the IOC as to the extent to which women's sports should be open to transwomen - and other individuals with XY genes.
These reservations focussed on androgenic hormones - the best known being testosterone. These are natural or synthetic substances that control the development of male characteristics - everything from the formation of testes, to male pattern baldness.. to strong muscles. In general, men have higher testosterone levels than women, with gap becoming substantial during puberty.
An IAAF working group, in conjunction with the IOC's Medical Commission, decided that female athletes with more than 10 nanomoles of Testosterone per litre (nmol/L) of blood would be bared from competition unless there were "reasonable grounds" for an exemption. The AIS condition being an example.
In April 2011, the new rules came into force. From this moment on, a confidential investigation could be made into any athlete where there were "reasonable grounds". This could be a complaint from a rival, or as a result of an anomaly in a drugs test.
If MTF reassignment surgery is performed after adolescence and puberty, Renee, Kia and some sports organizations such as the Womens Sports Federation seem to believe (albeit from an interpretation of their different approaches) that transsexuals should be evaluated on a case-by-case basis before being allowed to compete as women. But there is then an implication that transwomen will have to be below a certain age, height, weight or strength before they are allowed to compete as women - and "discrimination" is a word that will inevitably be raised by those that fail the tests.
If the question is posed whether male to female transsexuals can compete in all fairness with other women, the answer is probably "no" for most sports, particularly if SRS is conducted after a normal male puberty. The long term effects of SRS (androgen deprivation) and oestrogen hormone therapy partially reverse some of previous effects of testosterone on the transwomen's body, for example they become much closer to women norms in terms of muscle mass - but even in this category not completely so.
However the real question is whether post-operative transwomen should be allowed to compete as women. The answer here is a resounding yes - as the IOC and other sporting bodies finally recognised after decades of debate. Slightly surprisingly, three Summer Olympics (2004, 2008, 2012) have since passed without an acknowledged transsexual woman competing.
Following the IOC's lead, most sporting organisations now allow transwomen to compete in women's sports, indeed they would face legal challenges in many countries if they didn't. So far no openly transgender woman has reached the very top of her sport, when this happens (and it will) there will undoubtedly be much debate, particularly if the woman in question had previously competed with little success as a man.
In January 2016 the International Olympic Committee issued recommendations that transgender athletes should be allowed to compete at the 2016 Olympics without undergoing sex reassignment surgery. Male-to-female transsexual athletes would only need to prove that their testosterone level had been below a certain cut-off point for at least one year before their first competition.
The new guidelines - which the IOC say have been brought in to adapt to current scientific, social and legal attitudes on transgender issues - are not fixed rules or regulations but are instead designed as recommendations for international sports federations to follow.
Former IOC medical commission chairman Arne Ljungqvist, who was among the experts involved in drafting the new guidelines, said:
Under the previous IOC guidelines, which have been used since 2004, athletes who transition from male to female or vice versa are required to have reassignment surgery followed by at least two years of hormone therapy in order to be eligible to compete.
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