Ab rocker or whatever name…
I have one of these exercise assist frames. It has an attached mat as shown in the picture. There are both pros and cons to this equipment. I left this pretty quickly. It can aid you in doing sit-ups. However, it can reduce the number of muscles that are being used in the work and it can help you to “cheat” on the exercise. If you become strong enough to do these without it… do that. It can have a good purpose in helping you to do this exercise and can aid you in starting. You really should “graduate” from it if you are capable.
Ab Doer or other chair core exercisers
Yes… the name sounds silly. This is a well constructed cushioned chair with a back that has a roller and flexible design. The chair is made so that you can sit and push the roller back in pretty much any direction and exercise your core muscles. They fold up for easy storage.
With this chair, you basically stay in a seated position in the chair and push the back of the chair around, working against the resistance of that upper part of the chair.
Exercise chairs are often a great idea. As a matter of fact, I feel that these exercisers have a lot of value, especially for those who are injured or disabled. This can be a real benefit to anyone that wants to exercise in a seated position. I thought this would be a great thing to have for my dad when he lost mobility, but he did not take to this device. It is still in the garage and maybe one day I will appreciate it more.