Thread by @KirstiMiller30

Fact @USASwimming 16.5% of elite male athletes are competitive in their sports despite having endogenous T levels below 8 nmol/L which casts massive doubt on the relationship between endogenous testosterone and athletic performance.

The primary function of androgens is not muscle mass or human performance, but to create cell synthesis to assure and maintain body communication and one’s health.

If you take that away, the body becomes disabled as it can no longer maintain body health and well-being, due to the role that androgens play at a physiological level. It also takes away your sexuality.

For XY trans women, for them to match the same normal levels as XX women – i.e. to ensure normal cell synthesis and to take the body out of a post-menopausal state – a range of total T somewhere between the higher female atypical range and lower male atypical range is needed.

This is somewhere between 9nmol/L & 12nmol/L for non-athletes, but is understood to be higher in athletes. So XY athletes need to maintain a T level that is higher than the 2015 IOC 10nmol/L level just to maintain normal health.

The science proves that if you take away the body’s ability to produce androgens, it becomes so severely contradicted the body cannot function normally to maintain day to day health let alone compete long term at any level of sports.

sportsintegrityinitiative.com/sports-longest…

T belongs to a class of hormones called androgens. Whilst T is the dominant sex hormone in males (oestrogen in females), it is produced in significant quantities by both males and females – especially by elite athletes, who need it to aid muscle growth and recovery.

Females produce it in the ovaries and the adrenal gland, whilst men produce it in the adrenal gland and testes.

Scientists have found that when the body loses its ability to produce hormones, it loses its ability to maintain itself. If you remove the ovaries or testicles, then you are altering the body’s ability to naturally produce androgens, which has serious health implications.

The impact of ‘complete hormone deprivation’ removes the body’s day to day ability to regulate itself, but especially in the amount of androgens needed to respond to exercise. As the body has no androgens, cell synthesis ceases, causing a number of serious health issues

including the induction of an immediate extreme post menopausal state; a non-natural and aggressive ageing process; complete muscle atrophy (i.e. failure of muscle development and recovery, making sport impossible); anaemia; a large drop in haematocrit levels and more.

For @USASwimming to suggest such a parallel with XX chromosome women in terms of hormones is false, unethical, as well as being medically and scientifically immoral. They are comparing apples to oranges.

Surgically transioned XY women produce no androgens, but XX women have healthy androgens, which carry over 200 daily functions in the human body.

This statement alone goes against CAS rulings and also laws in many countries. The sport has to prove an athlete has an unfair advantage NOT the athlete proving they don't. There is no research been done by Usa swimming to prove this adv exists.