I dig it. I inferred that joint from your description but had to look up the term to be sure.
Punch knuckles, not door knocking knuckles. Climbing needs more strength in the door knocking knuckles, whereas many grip strength exercises like deadlift do more work on the punching knuckles, the metacarpophalangial joints.
I’ve seen doodads that connect to the fingertips to focus work on the proximal interphalangeal joints.
Great descriptions! Lately I’ve been working on the (pardon me, I couldn’t find a use for them) distal interphalangeal knuckles, just hanging from my finger tips. Pretty much all the good climbers at my gym can do that with weight added on a belt so I’ve still got a long way to go. But yeah I used to lift pretty heavy and this was pretty much impossible before I started practicing, just seem like totally different parts of the body although they’re all in the hand.
