In a paper published in the BMJ Journal of Medical Ethics, Anderson and fellow Otago University researchers, Alison Heather and Taryn Knox, found the 10nmol/L level permitted by the International Olympic Committee was “significantly higher than that of cis-gender women, whose sex and gender align as female”.
Heather said the advantages go well beyond a testosterone level test.
A trans athlete has prior exposure to testosterone, which develops larger muscle mass, muscle distribution and even the amount of oxygen the athlete can accumulate.
“All these factors are not considered. We just say your testosterone level is under 10mnol/L. It is still much higher than a cis female and none of the rest is being considered.
“It’s not just your here and now testosterone that matters, there is also prior exposure to testosterone. Testosterone even form a fetus is defining a males brain, a male’s bone structure and lung structure.”
“They have a different bone structure so they are able to put more power in their jumping and anything that involves having to lift something, they have more power in their legs through their knees to hip ratio.”
A woman’s child-bearing hips also means her elbows are at a wider angle than a trans athlete’s, putting them at a disadvantage as the smaller angle achieves more power.