Transwomen in women's sports

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An infographic explaining several significant differences between the sexes

Since the trans activist notion of "trans women are women" is meant literally, it follows that transwomen would be allowed to partake in women's sports. When a sports organization adheres to this notion, it poses a problem to women's sports, since the various physiological differences between the sexes allow peak-performing male athletes to significantly outperform peak-performing female athletes in most disciplines. The extent to which hormone replacement therapy (HRT) decreases the advantages of being male is yet unstudied, however it is clear that many of the changes the male body undergoes during puberty are not reversed by HRT, such as overall body size, skeletal structure, or the size of the lungs and heart.

Physiological differences

Significant physiological differences between the human sexes that might affect athletic performance include but are not limited to:

  • Males weigh about 15% more on average[1]
  • Males are about 15 cm (6 in) taller on average[1]
  • Males have denser and therefore more durable bones on average[2]
  • Males have stronger tendons and ligaments on average[2]
  • Males on average have greater total muscle mass[3]
  • Males on average have a greater ratio of muscle mass to total body mass[3]
  • Males have about 56% greater lung volume relative to body mass[4]
  • Males have larger airways and larger expiratory airflow, even when matched to women for height and lung volume[5]
  • Males have larger hearts, with 10% higher red blood cell count and higher haemoglobin, meaning greater oxygen carrying capacity, although the difference is less pronounced among athletes[4]
  • Males have higher circulating "clotting factors" which allow for faster healing of wounds and higher peripheral pain tolerance[4]

The differences in strength can be very significant. For instance, gross measures of body strength suggest that women are approximately only 50% to 60% as strong as men in the upper body, and 60% to 70% as strong in the lower body.[6] A study of hand-grip strength found that even elite female athletes can be surpassed by a man with no athletic training.[7] Another study of sports performance in various disciplines found that males tend to perform 5.5% to 36.8% better, depending on the discipline.[8]

Notable transwomen in women's sports

Fallon Fox

Fallon Fox saying he enjoyed fracturing his female opponent's skull

In September 2014, male mixed martial arts (MMA) fighter Fallon Fox severely injured a female opponent, Tamikka Brents, causing her to suffer a concussion, an orbital bone fracture, and seven staples to the head, in the first round of a fight. Brents took to social media to convey her thoughts on the experience of fighting Fox: "I've fought a lot of women and have never felt the strength that I felt in a fight as I did that night. I can't answer whether it's because she [sic] was born a man or not because I'm not a doctor. I can only say, I've never felt so overpowered ever in my life and I am an abnormally strong female in my own right," she stated. "Her grip was different, I could usually move around in the clinch against other females but couldn't move at all in Fox's clinch..."[9] According to Wikipedia, Fox has won 5 out of 6 MMA fights in total as of May 2019, three of which were by knockout.[10]

In June 2020, during debates spurred after J.K. Rowling's criticism of the transgender movement, Fallon Fox tweeted about the event: "I knocked two out. One woman’s skull was fractured, the other not. And just so you know, I enjoyed it. See, I love smacking up TEFS in the cage who talk transphobic nonsense. It’s bliss! Don’t be mad. 😉"[11]

Rachel McKinnon

Male transgender cyclist Rachel McKinnon won the women’s 35-44 sprint during the UCI Masters Track Cycling World Championships in Los Angeles, in October 2018.[12] Third place finisher Jennifer Wagner commented that this was unfair, and later commented on Twitter that she would work on getting the rules changed, which Rachel McKinnon characterized as transphobic.

Terry Miller and Andraya Yearwood

Two male transgender high school athletes, Terry Miller and Andraya Yearwood, won first and second place in the Connecticut state championship 100-meter dash in 2018. Miller also won first place in the 200-meter dash.[13]

Laurel Hubbard

Also see: Wikipedia:Laurel Hubbard

Male weightlifter Laurel Hubbard from New Zealand has been taking many women's gold and silver medals. In the 2017 Australian International & Australian Open in Melbourne, he took the gold medal of the women's heaviest 90 kg+ category at a bodyweight of 131.83 kg.[14] He thus became the first person to win an international women's weightlifting title for New Zealand.[15][16]

Hubbard met the official eligibility requirements to compete against women, but many female competitors pointed out the unfairness of the situation. These include Iuniarra Sipaia, Toafitu Perive, Deborah Acason, and Tracey Lambrechs.[17][15] Australian Weightlifting Federation's chief executive, Michael Keelan, said it was unfair to other competitors.[14]

Hubbard qualified for the 2018 Commonwealth Games,[18] but an elbow injury during the competition forced his withdrawal from the event,[19] while however leading the field.[20]

Hubbard took another two women's gold medals at the 2019 Pacific Games in Samoa.[21]

Michelle Dumaresq

Canadian professional downhill mountain-bike competitor Michelle Dumaresq, who is a post-operative male-born transsexual, won the 2002 Canada Cup series, which qualified Dumaresq for the Canadian National team. In September 2002, Dumaresq co-represented Canada at the World Mountain Bike Championships. However, due to technical issues with the bike, Dumaresq only managed a 24th-place finish in the event. In 2003, Dumaresq won the 2003 Canadian National Championships and again represented Canada in the 2003 World Championships. Dumaresq repeated a Nationals win in 2004 and finished 17th at the 2004 World Mountain Bike Championships held in Les Gets, France.

At the 2006 Canadian Nationals, a protest from one of the competitors during the podium ceremonies brought attention to Dumaresq's participation in female sports. The boyfriend of second-place finisher Danika Schroeter jumped up onto the podium and helped Schroeter put on a T-shirt reading '100% Pure Woman Champ'. The Canadian Cycling Association suspended Schroeter for her actions. However, the CCA announced that Schroeter's time off the race course would be served during the off-season when it would have no impact on her.

Hannah Mouncey

On 27 May 2018, male transgender handball player Hannah Mouncey scored three goals for Melbourne Handball Club in their win over University of Queensland Handball Club for the 2018 Oceanian Open Club Championship.[22]

Gabrielle Ludwig

At 52, Gabrielle Ludwig, a Navy veteran, enrolled in Santa Clara Community College's women basketball team. Towering at 6’8”, and more than 30 years older than the female players, this post-operative transwoman was predicted by the team's coach to become "the most dangerous player in the state”,[23] a prediction which proved to be accurate.[24]

Lana Lawless

The Story Behind Transgender Trying to Play On LPGA Tour[25]

Chloe Anderson

This transgender volleyball player’s path leads to an NCAA women’s team[26]

Nattaphon Wangyot

Transgender student's all-state honors in girls' track and field ignites backlash[27]

Amelia Galpin

Why This Trans Woman Is Running the Boston Marathon[28]

Aron Taylor

First transgender woman finishes Jacksonville Marathon[29]


  1. 1,0 1,1 Ogden CL, Fryar CD, Carroll MD, Flegal KM (2004) Mean body weight, height, and body mass index, United States 1960-2002. Adv Data (347):1-17. PMID: 15544194
  2. 2,0 2,1 Benjamin M, Toumi H, Ralphs JR, Bydder G, Best TM, Milz S (2006) Where tendons and ligaments meet bone: attachment sites ('entheses') in relation to exercise and/or mechanical load. J Anat 208 (4):471-90. DOI:10.1111/j.1469-7580.2006.00540.x PMID: 16637873
  3. 3,0 3,1 Janssen, I., Heymsfield, S. B., Wang, Z., & Ross, R. (2000). Skeletal muscle mass and distribution in 468 men and women aged 18–88 yr. Journal of Applied Physiology, 89(1), 81-88. doi:10.1152/jappl.2000.89.1.81
  4. 4,0 4,1 4,2 Glucksmann, A. (1981). Sexual dimorphism in human and mammalian biology and pathology. London: Academic Press. pp. 66–75
  5. Duke J.W. Sex Hormones and Their Impact on the Ventilatory Responses to Exercise and the Environment (Chapter 2). In: Hackney, A. (ed.) (2017). Sex hormones, exercise and women: Scientific and clinical aspects. Cham (Switz.): Springer, pp. 21-22
  6. Miller AE, MacDougall JD, Tarnopolsky MA, Sale DG (1993) Gender differences in strength and muscle fiber characteristics. Eur J Appl Physiol Occup Physiol 66 (3):254-62. PMID: 8477683
  7. Leyk D, Gorges W, Ridder D, Wunderlich M, Rüther T, Sievert A et al. (2007) Hand-grip strength of young men, women and highly trained female athletes. Eur J Appl Physiol 99 (4):415-21. DOI:10.1007/s00421-006-0351-1 PMID: 17186303
  8. Thibault V, Guillaume M, Berthelot G, Helou NE, Schaal K, Quinquis L et al. (2010) Women and Men in Sport Performance: The Gender Gap has not Evolved since 1983. J Sports Sci Med 9 (2):214-23. PMID: 24149688
  9. Cage Potato. (n.d.). After Being TKO'd by Fallon Fox, Tamikka Brents Says Transgender Fighters in MMA ‘Just Isn’t Fair’. [online] Available at: [Accessed 31 Jan. 2019].
  11. Fallon Fox (June 16, 2020). Fallon Fox tweeting about injury caused to opponent. Twitter.
  12. Ballinger, A. (2019). Rachel McKinnon becomes first transgender woman to win track world title - Cycling Weekly. [online] Cycling Weekly. Available at: [Accessed 31 Jan. 2019].
  13. Hudak, A. (2018, June 14). Transgender track stars win state championship, ignites debate over rules. Retrieved from
  14. 14,0 14,1 Matt Windley (March 20, 2017). Laurel Hubbard wins female 90kg+ division at weightlifting’s Australian International. Herald Sun.
  15. 15,0 15,1 Marissa Payne (March 22, 2017). Transgender woman wins international weightlifting title amid controversy over fairness. The Washington Post.
  16. Weightlifting: Transgender lifter Laurel Hubbard wins first international outing. NZ Herald. March 19, 2017.
  17. Sina Filifilia Seva’aetasi (March 23, 2017). Woman lifter beaten by transgender speaks up. Samoa Observer.
  18. Laurel Hubbard - New Zealand Olympic Team. New Zealand Olympic Team. November 24, 2017.
  19. Bridget Tunnicliffe (April 9, 2018). Hubbard has no regrets, stays 'true to sport'. Radio New Zealand.
  20. Helen Davidson (April 9, 2018). Transgender weightlifter Laurel Hubbard's eligibility under scrutiny. The Guardian.
  21. Michael Pavitt (July 13, 2019). Transgender weightlifter Hubbard beats home favourites at Samoa 2019 after driving incident revealed. Inside the Games.
  23. 50-year-old transsexual ‘woman’ makes college basketball debut. (n.d.). Retrieved 31 January 2019.
  24. espnW -- Gabrielle Ludwig, a 52-year-old transgender women’s college basketball player, enjoying best year of her life. (n.d.). Retrieved 31 January 2019
  25. Lana Lawless: The Story Behind Transgender Trying to Play On LPGA Tour | Bleacher Report | Latest News, Videos and Highlights
  26. Transgender Volleyball Player | Identify | Olympic Channel
  27. Transgender student's all-state honors in girls' track and field ignites backlash
  28. Boston Marathon and Transgender Runners | them.
  29. First transgender woman finishes Jacksonville Marathon |