One of the popular pieces of core exercise equipment is an ab trainer. The ab trainer is a good choice because it will help to ensure that you don't cheat at all when you perform your exercises.

The ab trainer has you lie flat on your back to start, while resting your head upon a piece of padding. Your arms are then placed either towards the sides of you or at the top above your head depending on what your preference is. From there, you will simply contract the core muscles and move the machine so that it starts a 'rolling' action and your head lifts upwards.

Compared with a traditional crunch, this machine will help to really make sure you are just working those core muscles and take less stress off the lower back.

The nice thing about this machine too is that you can perform a variety of different variations such as with your knees bent and to the side or with your legs up in the air, toes pointing towards the ceiling. All will target the muscles from a slightly different angle and thus help to give you a better workout.

It should be stated as well that just as with any exercise for this area of the body, it is essential you ensure you are breathing regularly throughout. This will help you maintain muscle contraction better and also help to reduce fatigue. Proper form is still a must since that is what is going to determine whether or not you see results.