For several years now, the best way to work out your ab muscles has been the "Ab crunch trainer," from Weider or the "AB shaper" as it is also called.

So, what does it do exactly ?

The AB crunch trainer made by the brand WEIDER appeared for the first time in 1992 on a programme about american tv shopping. Since then, the AB crunch trainer has become one of the best sellers in the fitness world.

It has an extremely simple design.The aim is for the user to do the famous “crunchâ€? movement with as little help as possible. The 2 bars support you but also let you move freely. There is also the added benefit of the head rest which maintains your head in the correct position, so that you will not damage your neck and upper back. At the beginning you may feel nothing and you could aks yourself if the machine really does anything. However, after about 20 sit ups you really start to feel the effect on your muscles. The machine is particulary effective as it works out all of the ab muscles. You can control which muscles you work out exactly, by changing the postion of your legs.

The AB crunch trainer is great for beginners who want quick and effective results.