Louie Simmons's signature posterior-chain and spinal-decompression movement: torso anchored face-down on an elevated bench with legs hanging free, swinging the legs from a hanging stretch position to full hip extension using the glutes and hamstrings, not the low back.
Demo: Louie Simmons / Westside Barbell
Sets
3
Reps
12-20
Rest
1 min
Contraindications
Generally considered one of the safest posterior chain exercises for the lower back due to its traction/decompression effect — widely used by Westside Barbell for lifters with disc pathology. Still avoid with acute SI joint irritation or if hanging free of the legs causes sharp pain. A true reverse hyper machine with a swinging pendulum is ideal; a bench-only version is a reasonable substitute but provides less controlled resistance.Setup
Lie face down on a bench with hips at the edge, torso and chest supported, legs hanging freely toward the floor, hands gripping the bench for stability.
Execution
- 1Let the legs hang down into a stretched position at the bottom
- 2Swing the legs up to hip-extended, in-line-with-torso position using glutes and hamstrings
- 3Avoid using the lower back to whip the legs — this is a hip-driven movement
- 4Control the return to the stretched bottom position
- 5Keep the head and chest relaxed on the bench throughout
Key cues
- Squeeze glutes to drive the legs up, don't yank with the low back
- Let it stretch fully at the bottom, don't rush
- Keep chest and head relaxed and supported
- Controlled tempo, not a wild swing
Common faults
- Using low-back hyperextension to swing the legs (defeats the decompression purpose)
- Excessive momentum/swinging instead of controlled hip drive
- Not achieving a full stretch at the bottom
- Head/neck craning up during the movement
Tweaks
- Add ankle weights or a light band for resistance
- Alternate single-leg reps
- Slow eccentric tempo for control emphasis
Regressions
Progressions
Muscles
Primary: Gluteus Maximus, Hamstrings
Secondary: Erector Spinae, Core
Notes
Simmons invented the reverse hyper machine specifically to train the posterior chain while decompressing (traction on) the spine — he considered it essential for lifters returning from back injury.
Sources
- Louie Simmons Reverse Hyper Instruction
- Barbell Medicine - Posterior Chain Accessories for Low Back Health
Attribution: Louie Simmons