Just a reminder that testosterone is not a magic "good at sports" potion, that humans all have both testosterone and estrogen, and that saying a woman's *natural* hormone levels give her an unfair advantage at sports is like arguing that tall women should be banned from professional basketball.
Some quotes from the article (my emphasis):
Testosterone is a powerful anabolic hormone—it helps you build lean muscle mass significantly—so it tends to boost your generalized strength, especially in areas like the upper body where your muscles have more receptors for it. It’s also a driver of red blood cell count, and the more red blood cells you have the more oxygen you can carry to your muscles, increasing your aerobic capacity.
It seems to follow logically, then, that testosterone would boost your athletic ability generally. But if that were true, we’d expect to find a strong correlation with performance and testosterone. And we don’t.
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Complicating all of this is the fact that elite athletes’ testosterone levels vary quite a lot. One analysis found that 25 percent of elite male athletes have testosterone levels below what the International Association of Athletics Federations consider the lower limit for men. What’s more, it wasn’t the athletes in less strength- or speed-oriented sports. Some of the events with the most men below the limit were powerlifting, rowing, track and field, ice hockey, and rowing. Basketball players and alpine skiers had some of the highest levels. That all seems to imply, at least to some researchers, that high testosterone isn’t a universal performance booster.
