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Old 09-13-2013, 07:22 AM   #2
Blake Barnes
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Join Date: May 2013
Posts: 706

The back extensions and seated good mornings (with very light weight) should be just fine. I don't think it's that necessary to have a lot of dynamic spinal erector-strengthening exercises. One or two would suffice considering most exercises are done with a flat back that is held statically throughout.
Blake Barnes
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