I'm looking for some advice on how to work past a mobility limitation. HS PE2 "Static Standing Shoulder Extension with Weight" is something I've been stuck on for about 6 months.
Currently I can get to approximately 60 of the 90 degrees with a wooden dowel.
I've been working on an assisted stretch with a box which gets me to the 90 degree mark and holding for 2 minutes at a time while I relax into the stretch but I'm not sure how frequently I should be doing this or what kind of repetition to avoid overdoing it.
Can anyone recommend a plan on how to progress through this? I'll be honest, being stuck on the same exercise for this long without moving forward is becoming discouraging.