Why good mornings are bad?

The weight on your back in the hinged position has the potential to cause a serious spinal injury if you're not careful. Seedman advises against performing Good Mornings if you're a beginner. It's important to master the hip hinge with exercises such as RDLs and Pull Throughs before considering a Good Morning.

What are the benefits of good mornings?

The good morning can increase a lifter's strength and awareness of the lower and upper back. Enhancing upper back tension and lower back stability can help lifters who lack the strength to pack the barbell tightly in the back rack and/or tend to fall forward in the squat and cannot recover from poor positioning.