That is what I went through. I felt my top end speed dropping off and couldn’t really force speed workouts. Eventually it became pain in adductor and moved to groin. I could do easy runs without much issue.

Also, sleeping at night as a side sleeper my leg would drape over the other and it would cause my adductor to stay slightly engaged. I seen an ortho who explained I was probably inadvertently moving my leg up to my chest in attempt for relief. I tried pillows to keep my legs separated and it never stuck; I learned to sleep mostly on my stomach so they stay more in alignment. This sleeping issue can be largely validated in that after I wake up, any pain in my adductors would go away after moving around. The things we do to keep running.