45 degree back extension machine vs. ghd back extension machine

[George Shaheen]

I've searched the forums a bit for this but haven't been able to find any definitive answer.

I've seen that the 45 degree back extension machine is bad for you, but no reasons why...

why is it bad? It's the only thing my gym has. Am I losing anything by using this machine instead of the typical GHD machine?

[Wade Smith]

Do you have access to a GHD rack at your gym facility?

[Emily Mattes]

I can't answer as to whether it's good, but it doesn't work for me. It over-engages my hamstrings and glutes and though I can do extensions fast and furious on the 45-degree machine, I'm finding my lower back is comparatively weak. I don't have access to a GHD machine, so I do good mornings instead.

[Joe Cavazos]

I've been using the 45-degree machine for my WODs. I used to do 45-pound Good Mornings, but the cycle time was too slow and limiting. On the machine, though, I make sure to move my torso through an arc greater than 90 degrees to make up for the fact that it's slanted and thus easier. I'm considering changing the movement, though, to a 90-degree arc while holding a weight against my chest.

The other option is to fashion a makeshift GHD using a bench and a Smith Machine or some other such combination. But I don't like that since I work out in a non-CF gym, and the only thing worse than occupying equipment for the duration of a WOD is occupying equipment in weird and unusual ways for the duration of a WOD.

Is it bad for you? I don't know, but I feel fine.