Core

Start the V up by laying on your back with arms and legs straight. This motion is basically a sit up and a leg lift done simultaneously. At the top of the motion, try to touch your toes with your fingers. read more...
This one is pretty self explanatory. It is worth pointing out though that the axis of the cam (usually designated with a red or black dot on the side of the machine) should line up with the middle of your abs. If your seat is set too low, or too high, you cannot complete a full range of motion. read more...
I would almost classify this one as an advanced exercise. Many people do not have the strength or flexibility to do this in a full range of motion without compensating. Try and find the angle you can rotate to without lifting opposite shoulder off the ground to compensate. Stay tight in your abs and take your time on the speed in which you perform this one. read more...
This seated, straight leg raise is for the upper and lower abdominals. Start by sitting crossways on one side of a weight bench with legs straight and your body at a 45 degree angle to the floor. Raise your legs up and bring your torso forward at the same time then lower. Use your palms behind you for balance. read more...
While similar to the deadlift in that muscles used are upper back, lower back and hamstrings, I actually use this motion for development of the oblique muscles in the abdominals. By holding the bar on one side of the body, the lifter is forced to use the oblique muscles on the opposite side (contra-laterally) to stabilize. read more...