Was scanning this post from Ivo of the Gait Guys on the iliacus, and had a little time to mine the citations for additional info. After looking up this guy on hip flexor strength with acetabular labral tears, it was decreased fyi, I noticed a bit of a gem on the sidebar.
This last article has some great visuals of the muscle and hip musculature in general.
Please refer to our previous posts on the underappreciated iliocapsularis