East Asians are growing taller now that they're introducing more protein to their diet. Their problem isn't height related. Body definition is what sets them back.
The knee to hip angle of east Asians is different to whites and blacks, which adds more curvature to their femurs and makes them weaker.
It may not be PC to say, but it is well known within the scientific community that east Asians have the largest brains in the world, which forces them to have a different shaped pelvis to make room for delivery during birth. It's why they don't fare too well in athletics. Whites are in the middle, having smaller brains than east Asians, but much larger than west Africans. It's why whites run faster than east Asians, but are not anywhere as fast as Jamaicans, who are of west African origin.
The knee to hip angle of West Africans is perfect for running and allows them to build more muscle, as it is better equipped to support a larger frame. ACL injuries are far more common among women than men because they have a much wider pelvis, which places more stress on their knees as it makes their gait less stable. The differences between the races may not be as extreme, but they still have an impact on performance.
https://www.sciencedirect.com/science/article/abs/pii/S016028960200137X
Intelligence
Volume 31, Issue 2, March–April 2003, Pages 139-155
Brain size, IQ, and racial-group differences: Evidence from musculoskeletal traits
Author links open overlay panelJ.PhilippeRushtonElizabeth W.Rushton
https://doi.org/10.1016/S0160-2896(02)00137-X
Get rights and content
Abstract
A review of the world literature on brain size and IQ by Rushton [Rushton, J. P. (1995). Race, evolution, and behavior: a life history perspective. New Brunswick, NJ: Transaction] found that
African-descended people (Blacks) average cranial capacities of 1267 cm3, European-descended people (Whites) 1347 cm3, and East Asian-descended people (East Asians) 1364 cm3. These brain size differences, containing millions of brain cells and hundreds of millions of synapses, were hypothesized to underlie the race differences on IQ tests, in which Blacks average an IQ of 85, Whites 100, and East Asians 106. The validity of the race differences in brain size, however, continues to be disputed.
In the present study, the race differences in brain size are correlated with 37 musculoskeletal variables shown in standard evolutionary textbooks to change systematically with increments in brain size. The 37 variables include cranial traits (such as jaw size and shape, tooth size and shape, muscle attachment sites, and orbital bone indentations), and postcranial traits (such as pelvic width, thighbone curvature, and knee joint surface area). Across the three populations, the “ecological correlations” [Jensen, A. R. (1998). The g factor. Westport, CT: Praeger] between brain size and the 37 morphological traits averaged a remarkable r = .94; ρ = .94. If the races did not differ in brain size, these correlations could not have been found. It must be concluded that the race differences in average brain size are securely established. As such, brain size-related variables provide the most likely biological mediators of the race differences in intelligence.
