Stomach vaccum frequency question

[ghettoboyd]

i have know idea man but am curious if u use this tecnique and find it effective.

[40plusnewbie]

i have know idea man but am curious if u use this tecnique and find it effective.

I"m gonna go find the youtube link of a dude who is well trained in this exercise and you can see for your self what one can do. This muscle is majorly overlooked in workout routines and if you care about tight abs it can make a big difference.