An incline bench usually with a removable back pad to make the bench more adjustable to an individual's height constraints. Ab benches come with pulley-and-cable mechanisms that are engineered to lift weights as you work your abs in a crunch style of exercise. The weights are attached to a strap fits over your shoulders, you hold the strap and perform a crunch while lifting the weights that hang behind the bench. Ab benches are excellent units for exercising the abdominals. Well known brands such as Nautilus, Powertec and BodySolid sell top of the line ab benches; these can be found for some of the best prices at online stores such as MegaFitness and BigFitness.com.