Strength exercise seems to help https://www.webmd.com/men/features/exercise-and-testosterone...
They are a content farm owned by Internet Brands and their only focus is creating content as vehicles for pharmaceutical and consumer packaged goods advertisements.
But there's a problem, if your testosterone level is too low. In my experience, that increases the risk of tendonitis. Also, it didn't seem that exercise did much good. At least, not for strength training.
But with testosterone supplementation, exercising builds muscle and reduces fat. And no tendonitis. Also better blood sugar management, and less acne. Maybe even darker hair. But clearly not more hair on my head.