thinsgreat
Cathlete
i just completed the core part of this and have to say wow! to one exercise... i have pretty good abs and have never not been able to do an exercise..well, i tried the weighted barbell on the floor that you bend down , hold the bar and roll yourself out to a plank (no prob), but while retracting your abs you roll the bar back in and stand up---has anyone else had problems with this?