|
Originally Posted by PWGriffin and P-Funk
The lower back muscles are really only stabilizing the trunk and spine...the muscles undergoing an eccentric and concentric contraction are the hip extensors....
|
|
Okay. Busted! I don't have a belly button day... yet.
I do them on leg day as of now. |
vBulletin Copyright ©2000 - 2009,
Jelsoft Enterprises Limited.