Boxing is well-engineered white demoralization propaganda.
Africans, specifically West Africans, have the smallest lung capacity of all ethnicities in this world, which is great for anerobic sports and whenever intervals are present. East Africans are, so to speak, the opposite of that. Great at long-distance running. Essentially, what this means for West Africans (almost 90% of all African Americans) is that they get out of breath sooner but need shorter breaks than East Africans or Europeans to get up again.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4450153/African Americans usually have fast-twitch muscle fibers of type llb (8% less slow-twitch and 7% more fast-twitch muscle fibers). They produce ATP (adenosine triphosphate, look it up) at a slow rate by anaerobic metabolism and break it down very quicky. This results in short, fast bursts of power and rapid fatigue.
https://fitnessgenes.com/blog/natural-athletic-ability-of-african-americans/African Americans also have denser skeletons, a different skin barrier, longer limbs and less body fat on average. They are also more aggressive due to higher blood pressure, testosterone levels (which directly suppresses oxytocin in mice) and being more salt sensitive (of course could be linked to susceptibility to crime but never is). These are reasons they don't compete as well at "Strongman", swimming or also MMA.
You can see what this means. Every boxing match between a white man and a black man is fundamentally a David versus Goliath fight, but the media never promotes it this way.
Another contributing factor is that gyms are always located near either black or Hispanic neighborhoods.
