Hello everyone!
I am set to start PhD but my PI wanted me to design a study based on their paper on predictable chronic mild stress.

Pain sensitivity increases with sleep disturbance under predictable chronic mild stress in mice
Dalanon, J., Chikahisa, S., Shiuchi, T. et al. Sci Rep 11, 14231 (2021). https://doi.org/10.1038/s41598-021-93560-7

It is difficult for me to understand. Can somebody please interpret the results in simple terms?
Thank you all so much.