Hyperextension Test?

I am drawing a blank on the name and parameters of the lower back test where you hold a parallel hyperextension for time, I know it is named after someone, I would really appreciate any help.

Supermans??

not sure if that is what you’re talking about

then again, that’s more of an exercise than a test

No, not supermans, thank you though. Somebody has to know?

Biering-Sorensen position.

From “Low Back Disorders” by Stuart McGill Ph.D. 2002

What do I win???

TNT

TNT,

You are the man! Thank you very much for jogging my memory, I appreciate the help!