I have a woman cycling friend in her 60s. She leads a small local group of cyclists named the tortoises, not fast but they do focus on climbing.
I think her issue was osteoarthritis connected to her knee / meniscus??? She spent $1K of her own money for one PRP treatment here:
https://www.gloriatuckermd.com/. She said it was the best grand she's ever spent.
Took 6 weeks to recover. Now my question is was it the PRP or 6 weeks of rest off the bike?