Thoughts on Back Health
Those who think of hypertrophy around the lumbar spine as a marker of back health or view it as a training goal are misguided. Absolute spinal erector strength doesn't necessarily protect your back from anything; skilled movement patterns are more likely to do that. Back health (from a sagittal plane standpoint) is about control of torso orientation and alignment, while moving within the context of gravity. It is about understanding the difference between spine flexion/extension and hip flexion/extension. It is about limiting shear, torque and compressive forces over time, while maximizing strength and mobility of the lower extremities. Back health starts from the ground up, not in the back musculature.
Comments
Two people had identical "understanding the difference between spine flexion/extension and hip flexion/extension . . . [ability to limit] shear, torque and compressive forces over time, while maximizing strength and mobility of the lower extremities" would a person with greater posterior muscle mass be at an advantage compared to someone with less mass? Another possibly silly question is at what point could the extra mass be less advantageous if the quoted qualities were exceptional?