This exercise works the abs and lower back and is the proper version of an ab roller. This version is performed on your knees.   Steps Place a barbell on …

This is a good exercise core muscle development.   Steps Lie on your back with your arms outstretched to your sides. Bend your knees at a 60 degree angle and …

This exercise uses the weight of a cable machine to assist in a abs crunch. Steps Attach a rope to a high cable pulley. Place a bench in front of …

This version of the crunch works both the upper and lower portion of the abs. Steps Lie on your back and bring your knees up to a 60 degree angle, …

This is the most common abdominal exercise and possibly the most often improperly performed. Here is how to perform it correctly. Steps Lie on your pack with your feet up …

Using a decline crunch allows you keep your legs steady and isolate all of the abdominal muscles.   Steps Lie on a decline bench face up. Place your feet securely …

This version of a decline crunch isolates the oblique muscles of the abs. Steps Lie on a decline bench face up. Place your feet securely under the pads. Place your …

This exercise uses a ball to isolate and work the lower abdominal muscles. Steps Lay down as if you were performing a pushup. Place your feet and shins over an …

This crunch uses a Stability Ball. The ball allows you a better range of movement because it adapts better to your spine. Steps Sit on top of an exercise or …