"The evidence is unequivocal that starting in puberty, in every sport except sailing, shooting and riding, there will always be significant numbers of boys and men who would beat the best girls and women in head-to-head competition."
(I'm not sure I agree with those exceptions; watch sailing and tell me strength doesn't matter.... but anyway)
Prompted by the release of USA Gymnastics @usagym trans policy.
Specifically, the implication that performance differences between children of either sex and of any gender identity are negligible, therefore inclusion of transgirls with females is fair.
Here is summary data from Catley and Tomkinson, 2012, who collated performance data from 85347 Australian schoolchildren aged 9-17 years old.
Source here (full text can be found on ResearchGate).
‘First they justified trans women competing with women because they had “always” felt they were female. Then they say the “always” female trans athlete might “be” male for certain sports or at different times.’
‘Growing up male likely confers physical, hormonal, social and economic factors that contribute to this performance gap, but we cannot say that it is specifically due to testosterone in a way
that is significant and predictable.’
Let’s imagine a ball-making factory, the squishy, brightly-coloured kind of ball you kick around on the beach with a child (preferably one you own, not one stolen).
In that factory are two production lines. The first line paints balls red and the second line paints balls blue. Both machines are fed by boring beige balls.
They performed a literature search of transwomen in sport and concluded that:
“Currently, there is no direct or consistent research suggesting transgender female individuals (or male individuals) have an athletic advantage at any stage of their transition.”
This conclusion is not supported by the data they analyse.
First, the review intended to examine sports policies and participation, and consists largely of qualitative/survey data examining the experiences of trans people in sport.