Stuart McGill's decades of spinal biomechanics research have quantified the compressive forces produced by lumbar flexion under load: it dramatically increases disc nuclear pressure and annular stress, accelerating the disc degeneration that drives the chronic lower back pain affecting 80% of adults at some point in their lives.
Learning and Loading the Hip Hinge
- Dowel rod drill: place a rod along your spine during bending to give real-time feedback on spinal position
- Romanian deadlift: the most accessible progressive hip hinge load available
- Kettlebell swing: the ballistic hip hinge, once mechanics are established
- Single-leg deadlift: adds proprioceptive challenge and addresses asymmetries
- Box hinge drill: standing 15 cm from a wall and driving the hips back to tap the wall