Hello,
First time posting, so not sure if this is the write thread to leave a post with my question

. Please feel free to move the post.
I am currently doing a sheiko program my friend recommended. It has the title "Class 1 & CMS".
In this program I have noticed three variations of bench press grip mentioned.
These are: "Close Grip" vs "Middle Grip" vs "Narrow Grip" Bench Press
I was wondering if someone knew how close these grips are meant to be?
My thinking is that "Close Grip" and "Narrow grip" are actually the same, and here I am to bench with my forearms starting in a vertical position over my elbows, while the "Middle grip" is the grip that is in between my normal/wide grip and the "Close/Narrow Grip".
Could someone please clarify if possible?
Thank you very much.
Hai.