45 Degree Hyperextensions? Or Regular Hyperextensions?- Which Is Better???

[Texas Ranger]

Guys, I need some input here. Not counting the Ham/Glute Raise or Romanian Deadlifts, which are the best. In YOUR opinion, which exercise is the best to work the posterior chain(Glutes, Hamstrings & Lower Back)? The 45 Degree Hyper shown here. http://www.exrx.net/WeightExercises/Hamstrings/BBHyperextension.html Or the regular hyperextension done flat at a 90 Degree angle?

 

[Bulldog_10]

Personally, I like the flats...too bad my gym only has the 45 degree one

 

[Texas Ranger]

Thanks for responding, Bulldog! Do you feel any major differences in the muscles being effected between the two??

 

[Texas Ranger]

Up for more input, fellas...

 

[TrevMill]

I do the 45 degree because thats all my gym has. However, the 45 degree have a CRIPPLING effect on my lower back. I get such a pump that I'm hobbling out of the gym, lol. I can't imagine if I was on gear or M1t or something how bad the pumps would be.