Paris Olympics: As gender row engulfs boxing, what is testosterone?
Algeria’s Imane Khelif (in red) gestures to Italy’s Angela Carini in the women’s 66kg preliminaries round of 16 boxing match during the Paris 2024 Olympic Games at the North Paris Arena, in Villepinte on August 1, 2024. | Photo by MOHD RASFAN / AFP [FILE]
Figures such as far-right Italian Prime Minister Giorgia Meloni quickly condemned that Khelif was allowed to compete at the Games.
As the controversy threatened to overshadow the sixth day of the Olympics, here are some facts about testosterone.
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What is testosterone?
Testosterone is a sex hormone produced by both men and women. However men produce up to 20 times more testosterone — primarily in the testicles.
Women make far less, in the ovaries and adrenal glands.
A normal level of testosterone for men is estimated to be 10 to 35 nanomoles per litre in blood, according to the US Mount Sinai hospital.
For women, it is between 0.5 to 2.4 nmol per litre.
Testosterone levels can also vary widely by age and time of year.
When people naturally produce an excess of sex hormones such as testosterone, it is called hyperandrogenism.
The condition affects an estimated five percent of women, with around 70 percent of cases caused by polycystic ovary syndrome, research has found.
Symptoms include acne, body hair growth and scalp hair loss.
How does this affect sport?
Testosterone can promote bone and muscle mass — deliberately boosting levels is a common form of doping and is banned.
Research has suggested that people with an excess of testosterone are over-represented in elite sport.
But just how much the hormone boosts performance remains a matter of debate.
The International Olympic Committee’s head of human rights Magali Martowicz said in 2021 that there no was no “scientific consensus” on how testosterone affects athletic performance.
At the 2021 Tokyo Games, New Zealand weightlifter Laurel Hubbard became the first openly transgender woman to take part in an Olympic event.
To qualify, she had to keep her testosterone levels below 10 nmol per litre for at least 12 months.
In spite of meeting the requirements, Hubbard’s participation was widely criticised.
At the end of 2021, the IOC gave up on establishing uniform guidelines for this kind of participation criteria, leaving it to the separate international sport federations.
What about the boxers?
Khelif was disqualified during the boxing world championships last year after “elevated levels of testosterone failed to meet the eligibility criteria,” according to the IOC’s website.
Khelif and boxer Taiwan’s Lin Yu-ting were both disqualified from the New Delhi event by the International Boxing Association (IBA) under Russian oligarch Umar Kremlev.
However because of governance, financial and ethical issues at the IBA, it was effectively expelled from the Olympic movement last year. The IOC has taken responsibility for organising the boxing at the Paris Games.
In a statement on Wednesday, the IBA said the two boxers “did not undergo a testosterone examination but were subject to a separate and recognised test, whereby the specifics remain confidential”.
IOC spokesman Mark Adams said everyone taking part in the women’s event was “complying with competition eligibility rules”.
“These athletes have competed many times before for many years, they haven’t just arrived, they competed in Tokyo,” he said.
“Testosterone is not a perfect test. Many women can have testosterone which is in what would be called ‘male levels’ and still be women, still compete as women,” he said.
“This idea that suddenly you do one test for testosterone and that sorts everything out — not the case, I’m afraid,” he added.
“I hope we’re all agreed that we’re not calling for people to go back to the bad old days of sex testing, which was a terrible thing to do.”
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