Thank you! I searched for "UC Davis protocol for shoulder" and found Dr. Keith Baars at UC Davis and his research on tendons:

[Tim Ferriss podcast re Baars' work at

https://tim.blog/2025/02/27/dr-keith-baar-transcript/

and "dastratman" has produced an excellent summary of Baars' and Ferriss' discussions:

https://hackmd.io/@dastratman/rygQhSmhke ]

I searched your old HN posts and found that you've explained this before to HN denizens! Thank you, thank you so much!

FWIW I've never been able to throw w/o shoulder pain and, now that you mention it, I may make it my goal to build up to that!