Emma Hilton Profile picture
Dec 8, 2020 8 tweets 2 min read Read on X
I am delighted to announce that Hilton and Lundberg, 2020 is now published! @TLexercise

‘Transgender Women in the Female Category of Sport: Perspectives on Testosterone Suppression and Performance Advantage’

link.springer.com/article/10.100… Image
Anyone wishing to spot changes from our pre-print:

1. We included a section on pre-pubertal differences (that is, even young boys outperform young girls, thus the performance gap is not solely down to pubertal T).
2. We extended our analysis of CV capacity changes and potential impact on endurance performance (although we had acknowledged a likely effect, we have drilled deeper into mechanism).
3. We have *significantly* extended our discussion of impact on athlete transwomen and the mitigating effects of exercise (that is, moderate training can mitigate or even reverse muscle/strength loss during T suppression).
The remaining differences are minor, and represent no significant change from the pre-print.
👀 Image
Come on people, I want to break the 1000 mark. Image

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More from @FondOfBeetles

Sep 13
I had no experience of Charlie Kirk beyond the occasional clip that went past my timeline, none of which I engaged with deeply.

From this UK POV, he was a preppy fundie Christian conservative doing preppy fundie Christian conservative stuff.

No opinion about him beyond characterising him as above, and not thinking at all about that.

But I have rarely wanted to defend anyone more.
Why would I want to defend a preppy fundie Christian conservative? Why did my gut plummet and my heart sink when I learned he had died?

Almost all of us can understand the human POV.
I wasn’t exposed to him. I had to look up everything everyone was saying he said.

None of the below is about me and his views. It’s about the appalling dishonesty I see.

The way social media works. Or doesn’t.
Read 5 tweets
Aug 19
So, this paper is being widely circulated as a gotcha.

First thing, any author whose affiliation is "The University of the Sunshine Coast, Sippy Downs, Australia" is probably winning at life.

But let's talk about bird sex.

royalsocietypublishing.org/doi/10.1098/rs…
Birds use genetic sex determination, just like humans.

The "make male" gene for humans is called SRY, and it lives on the Y chromosome.

If you have functional SRY and its downstream transcriptional storm, you will make testes and make male.
Birds differ. Their "make male" gene is called DMRT1.

It pretty much works like SRY, in that it's immediate downstream target is the parallel gene in both humans and parrots, and the ensuing transcriptional storm triggers testes development (testes being male, of course).
Read 16 tweets
Aug 9
"This model of estradiol’s role in improving resistance to wound sepsis predicts at least four “sexes” across two treatment groups: females who are in the proestrus phase, females who are in the diestrus phase, females who are postmenopausal, and males."

This is Sarah Richardson, of the Fuentes review.

Four "sexes", three of them female and the other male. JFC.


Also in the frame as new sexes, fat men, pregnant women and children. JFC.scholar.harvard.edu/files/srichard…
A cell line derived from an unusual cervical cancer (one that spontaneously immortalised) is not even "human", let alone "female", apparently.

It's cervical cancer cell line. Only women have cervices (pl?). JFC.
Read 9 tweets
Aug 4
An interesting article from Professor Andrew Sinclair here, criticising World Athletics proposals to SRY screen their elite female athlete cohort.

It’s a classic. Arguments from authority. Cherry-picking. Doesn’t appear to have read the policy. theconversation.com/world-athletic…
A half-truth.

Apparently-female athletes who test positive for SRY will have a consultation with WA, with a view to medical assessment to better understand any medical conditions (DSDs) they have.

It is this diagnosis that will determine eligibility (or not). Image
After a primer on sex development, Sinclair tries a gotcha.

Describing Swyer Syndrome and CAIS, he argues these athletes would be unfairly excluded.

But WA makes it clear that CAIS is exempt from exclusion. It’s in both the policy and the press release. I doubt Swyer would be excluded either.Image
Read 8 tweets
Jul 28
Ok.

Let’s take Kelly’s penalty at 110 kph and Isak’s belter as 108 kph.

First up, Isak’s belter was from outside the penalty area, under defensive pressure, on the run and without perfect body positioning.

Compare. Image
Image
That Kelly put 110 kph on a penalty is astonishing. That Isak managed to get 108 kph out of this belter is astonishing.

Isak could put 110 kph on a penalty with his eyes closed. Kelly will never get 108 kph on a 20-yard shot she digs out from under her.

No shade.
Much has been made of Kelly’s approach. And her technique is *chef’s kiss*

Now imagine a man with the same expert technique, and who puts in as much % max effort as Kelly?

The ball’s going faster.
Read 5 tweets
Jul 25
Five years ago, I gave a speech comparing sex denialism to creationism.

At the time, my partner-in-crime, Colin Wright, and I were near-lone academic voices willing to stand up and say “Biology! We have a problem!”

@SwipeWright Image
Reflecting, back in 2020, on that state of affairs:

“[That] there are two sexes, male and female is apparently something that biologists do not think needs to be said.

I think they are wrong.”
Since then, biologists with far more authority than an unknown developmental biologist who was trying to work out how nerves navigate over muscles and an unknown evolutionary biologist who was studying what makes insects mad have spoken up.

And their voices are much welcomed.
Read 9 tweets

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