Recovering string-hopper here.
I’ve followed the advice from https://www.youtube.com/watch?v=RPVpw2seK9E (“start with speed”) and I can play 16ths on a single open string between about 120 and 150 bpm with relaxation and minimal effort. I’m not super consistent, but when I get it, it feels “right” - no tension, feels like I could do it a minute or so without getting tired.
My problem is that I cannot play with nearly the same ease or relaxation between 105 and 120 bpm. As soon as I get into that range, it seems like my string-hopping muscle memory kicks in and takes over, and I fall apart.
I have no problem moving the pick back and forth above the string (not making contact) at those speeds. But as soon as the pick touches the string, its like some sort of reflex kicks in, and other muscles start firing unhelpfully.
Any advice for getting through this?