Where do you get your new exercise and fitness info from?

At least I think I should say "other"? And I'm not sure how to think about "new", in my particular context.

I'm in a niche: I care about rowing, mostly - boats and machines. I get information from good rowing coaches (in person) or very successful experienced rowers, authorities published by the major sports organizations (like USRowing), even those published by some well-regarded specialty news organizations like Row2K, and even commercial outfits that know what they're doing, like Concept 2.

For non-rowing info, I tend to look to people with strong credentials in the specific subject(s): Physical Therapists, my Osteopath (musculo-skeletal specialist), fitness trainers I know in real life who have good education/credentials in a specific topic area, even sometimes my well-educated/credentialed massage therapist (who has relevant sports massage credentials).

If those kind of folks recommend other sources (that are in their scope of practice/education), I tend to trust the recommended sources, too, unless I find countering evidence. Sometimes I go to organizations (like well-regarded organizations involved in some other sport/exercise specialty) to see what they publish or promote. I've also used books that were written by people with good credentials, reputations, reviews from folks I consider knowledgeable.

Any or all of those may use YouTube or some kind of social media to provide information, I guess, but I definitely don't just go pick random stuff off from social media or YouTube. Yikes.