https://t.co/iK6vmw9ixz
Here follows my quick first thoughts of Roberts et al., 2020.
I predict this paper will generate much discussion over the coming weeks and months.

Highly-active people, albeit not specifically-trained athletes. Mean age 26.6 yrs +/- 5.5 yrs.


The performance of TW/TM over 30 months of treatment was retrieved from official records and compared with pre-treatment “baseline” performance.
(I think I’m reading that correctly...)
TW were weaker than control men (CM) pre-treatment and throughout transition. The authors speculate this may be explained by aversion to upper body training and its aesthetic outcomes.

TW were equivalent to CM pre-treatment and to 2 yrs of transition. The authors argue that there is no clear aversion to abdominal training and its effect on body shape.

This is where it gets really interesting. While TW clearly lose speed from baseline, they appear to recover some speed after 2yrs.

Note: ‘weak’ is relative. These females are pretty hardcore :)
The push-up/sit-up data are interesting. These fitness tests come with targets that must be reached and the targets are different for males and females. My first question is therefore: after 2 yrs of transition, are TW are being set female targets?
Is it possible the apparent sharp drop off in performance is actually an artifact of the test conditions?
Are CM not bothering more than necessary, while TM go the extra mile? The authors also speculate that, again for aesthetic reasons, TM may train - hard - and thus, genuinely outperform CM. I’m not convinced.
Could be mirrored in TM?
1. TW are genuinely losing all their muscular endurance advantage after 2 yrs, in which case the running data shows it is impossible to undo the benefits of a male skeleton.
I’d argue that, when viewed as part of the ever-increasing body of knowledge, there is a retained strength advantage *and* unaltered skeletal advantage.
Thus, this study presents far more robust running data than that of Harper 2015.
More from Emma Hilton
Fitness data from over 85k AUS children aged 9–17 yrs showed that, compared with 9 yr females, 9 yr males were 9.8% faster in sprints, 16.6% faster over 1 mile, could jump 9.5% further, could complete 33% more push-ups in 30 s and had 13.8% stronger grip.
@BARBARABULL11 @boysvswomen @cbrennansports @Martina @devarona64 Here is my full description of that data.
Example:
1.6km timed run (CV endurance)
The *best* 17 yr old girls are matched by *average* 17 yr old boys, and beaten, by some measure, by the best 9 yr old
Here is summary data from Catley and Tomkinson, 2012, who collated performance data from 85347 Australian schoolchildren aged 9-17 years old. pic.twitter.com/qKdxqywpoq
— Emma Hilton (@FondOfBeetles) November 19, 2020
@BARBARABULL11 @boysvswomen @cbrennansports @Martina @devarona64 Male advantage of a similar magnitude was detected in a study of Greek children, where, compared with 6-year-old females, 6-year-old males completed 16.6% more shuttle runs in a given time and could jump 9.7% further from a standing
@BARBARABULL11 @boysvswomen @cbrennansports @Martina @devarona64 In terms of aerobic capacity, 6- to 7-year-old males have been shown to have a higher absolute and relative (to body mass) VO2max than 6- to 7-year-old
@BARBARABULL11 @boysvswomen @cbrennansports @Martina @devarona64 Pre-puberty performance differences are not negligible, and could be mediated, to some extent, by genetic factors and/or activation of the hypothalamic–pituitary–gonadal axis during the neonatal period, sometimes referred to as “minipuberty”.
Read on.
Delighted my research article Female Sports Participation, Gender Identity and the British 2010 Equality Act is now published in Sport Ethics and Philosophy. 1/https://t.co/wNPz2sd2WD
— Cathy Devine (@cathydevine56) November 9, 2021
First, Cathy reported the numbers and % split of UK males and females playing selected sports. Male participation is higher than female participation.

Then, Cathy used population estimates to predict the numbers of male and female athletes who would be eligible, under a selfID model, for the opposite sex category. Cathy calculated these trans athletes as % of opposite sex category.
I have calculated the trans athletes as a frequency in the opposite sex category.
Here is the data for transwomen in female sports.

Here is the data for transmen in male sports.

More from Transgender
- today?
- over the course of a week?
- before the end of the year?
- throughout 2021?
I want to hear about it - and I want you to spread the word to other cis people.
Some ideas, if you're stuck. If you have the money, donate to one (or all) of these fundraisers/organisations:
1. @GoodLawProject Transgender Lives
2. A trans healthcare/mutual aid fund:
- @BlkTAlliance
- @BlackTransUK
- https://t.co/4sIT4GJ08r
- @transMAMCR
- @SWTNMutualAid
3. @Genderintell, to get help to the young trans people under attack right now.
4. Educate yourself about #trans lives so that you can confidently spread that knowledge amongst your cis networks. Buy a trans-authored book today, read it cover to cover, then PASS IT ON TO A CIS FRIEND. Is there a trans resource you love? Give it to ALL your cis friends.
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There is co-ordination across the far right in Ireland now to stir both left and right in the hopes of creating a race war. Think critically! Fascists see the tragic killing of #georgenkencho, the grief of his community and pending investigation as a flashpoint for action.

Across Telegram, Twitter and Facebook disinformation is being peddled on the back of these tragic events. From false photographs to the tactics ofwhite supremacy, the far right is clumsily trying to drive hate against minority groups and figureheads.
Be aware, the images the #farright are sharing in the hopes of starting a race war, are not of the SPAR employee that was punched. They\u2019re older photos of a Everton fan. Be aware of the information you\u2019re sharing and that it may be false. Always #factcheck #GeorgeNkencho pic.twitter.com/4c9w4CMk5h
— antifa.drone (@antifa_drone) December 31, 2020
Declan Ganley’s Burkean group and the incel wing of National Party (Gearóid Murphy, Mick O’Keeffe & Co.) as well as all the usuals are concerted in their efforts to demonstrate their white supremacist cred. The quiet parts are today being said out loud.
There is a concerted effort in far-right Telegram groups to try and incite violence on street by targetting people for racist online abuse following the killing of George Nkencho
— Mark Malone (@soundmigration) January 1, 2021
This follows on and is part of a misinformation campaign to polarise communities at this time.
The best thing you can do is challenge disinformation and report posts where engagement isn’t appropriate. Many of these are blatantly racist posts designed to drive recruitment to NP and other Nationalist groups. By all means protest but stay safe.
