Ab exercises are the source of a great deal of misinformation in the weight training world. Companies exploit people’s insecurities surrounding their guts by bringing out a wide variety of useless garbage that will give you a six pack in a week and a half. If you don’t know what I am talking about stay up and watch late night tv. In this video Brad not only explains how to do ab crunches properly on the Powertec Multi System but more importantly explains the important factors in an ab workout. (more…)