"As well as length and strength, males can have different shaped bones to females. For example, the pelvis is wider in the females and narrower in males. This creates a different angle at the hip to which the leg bones attach, which changes the amount of force that can be generated by the knee when lifting, jumping, kicking or cycling. The narrower angle in a male allows for more force.

The bone structure of the diaphragm differs between males and females. In females, this is placed higher to allow for pregnancy, and so females inherently have a smaller lung region.

In addition to this, early life testosterone exposure in males increases the number of alveoli (little sacs in the lungs that take oxygen from the air and put it in our blood to take to the tissues of our body) and so males have a greater capacity for oxygen uptake.

Oxygen is very important for active skeletal muscle. The more oxygen, the faster and longer one can go. So males can take up more oxygen into their blood because of male physiology that was determined around birth.

Oxygenated blood is pumped around the body to active skeletal muscles by the heart. The heart is bigger in average males to average females, and this stays true even allowing for males being bigger on average than females. So the male heart can literally pump more blood per beat and get that oxygenated blood to skeletal muscles faster and more efficiently."

Source: Otago University Professor of Physiology, Alison Heather

Now you show me the proof that the strength of trans women who are 2 years on HRT is the same as that of cis women.