Recalcitrant PFP? In addition to your treatment regiment AND getting to THE CAUSE of the patello femoral pain (often but not always gluteus medius function), have you tried?
increasing step rate by 10% (ie cadence)
according to this article:
"all modifications were associated with reduced patellofemoral joint force during running, compared with the participants’ normal running gait. But the modifications were also associated with immediate symptom improvement of at least one point out of 10; 62.5% of runners in the study experienced a positive symptomatic response to at least one of the gait modifications."
Easy to do, easy to implement
Esculier J-F, Bouyer LJ, Roy J-S. Immediate effects of gait retraining on symptoms and running mechanics of runners with patellofemoral pain. J Orthop Sports Phys Ther 2017;47(suppl 1):A9.