[thesz]

I do not know. I am here to point out that HIIT is almost a resistance training. ;)

Here's meta review of resistance training for endurance running: https://pmc.ncbi.nlm.nih.gov/articles/PMC11258194/

Here's old one: https://pubmed.ncbi.nlm.nih.gov/18460997/

I think it is possible to utilize squats both as weight losing device and running economy improvement device.

I do not run, though, as I am too old. But I love barbell squats!