The 6"-in-the-back belts are a good analogy. I don't see a purpose for these things, since you can't even do a decent back extension on them, and they can't be jammed enough to make the rollers not spin at least a little.
Used the search function first, sorry if this has been talked about before.
I learned today, after wanting to add GHR's to the novice program, that my gym has the 'Roly Poly' variety of GHR bench with pads for the knees just below the rollers for you to (I assume) roll down on to after the back extension. I remembered the book warning not to do GHRs on something constructed like this.
Are these things in the same ball park as super wide back belts in that the design makes no sense? Is performing anything more than a back extension on this thing pointless? If I could jam a few plates/anything between the rollers and the knee pads to get it to remain still would this be a solution?
The 6"-in-the-back belts are a good analogy. I don't see a purpose for these things, since you can't even do a decent back extension on them, and they can't be jammed enough to make the rollers not spin at least a little.
I'm pretty sure that's the kind my gym has. The annoying part is one of the pads gets jammed out of place, making the movement uneven unless you punch it back into position. I don't know if it's easier than it's supposed to be on a better machine, but I use a decent amount of band tension to make them hard enough to be worthwhile anyway, so I'm not too worried about it.