This video in the Fitness category will show you how to do barbell hack squats. The video is from Livestrong. Michelle Trapp, a Certified Personal Trainer at Gold's Gym will demonstrate this routine. Keep the bar low enough so that you can safely un-rack it. Stand next to the bar facing away from the bar. Lift the bar and step away from the rack. Keep the bar close to your legs and let it slide along your legs as you come up and down. Your chest should be up and your head should be straight up. That's all about the hack squats.