Cimmino, Marco Amedeo is the author of this paper :
. 2021 May-Jun;39(3):564-569. doi: 10.55563/clinexprheumatol/vn1qbp. Epub 2021 Mar 30.
Seasonal onset of polymyalgia rheumatica: correlations with the pattern of clinical presentation, disease severity and outcome in 383 patients from a single centre ( their conclusion-there is no correlation )

I actually emailed him to ask this question :
Is there a correlation of onset of PMR with a prior, RECENT injury ( for me it was a knee injury) ?
and he replied :
"As far as I know, there is no correlation between trauma and PMR, both considering the literature and the patients I followed."