Thanks for writing in, Maura. I don't think we'll ever get good studies on the effects of Yin Yoga specifically. But there are some things trickling out about passive stretching. One of my favorite yoga teachers is Jules Mitchell who has an MS in Exercise Science and I believe she did her thesis on stretching. She offers workshops where she presents more current science on stretching. I took advantage of the pandemic and did a couple of programs with her this past year to brush up on my research. There aren't a lot of studies out since I wrote this article, but they all point to a general concensus that the benefits of passive stretching are conflated.But at the same time, passive stretching doesn't appear to do harm either. There have been some studies that *don't* show that stretching creates condistions where someone is more likely to get injured. This hints that the effects of stretching are both minimal and short lasting. I do my best to promote the mind-body, psycho-emotional benefits over the strictly physical aspects of Yin and that's what I try to pass on to those show study with me. On the whole, I think it's past time to say that all types of yoga are pretty meh when it comes to physical fitness benefit. Neuromusculuar beneift, sure, but that can't be all that someone is doing. In the end, I think it's a marketing problem. Yoga teachers feel like they have to show physical fitness benefit for the practice to be seen as valuable.