Back Extensions
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Spinal-extension exercise for the erector spinae (sacrospinalis).
Detail
Back extension is the exercise for the erector spinae (extension/hyperextension function of the lower back's superficial muscles — erector spinae). The erector spinae (sacrospinalis) consists of three groups (iliocostalis, longissimus, spinalis) and runs the length of the back from skull to sacrum — so it is incorrect to call it merely the "lower back muscle." Maintain proper spinal alignment (S-shape, never a C-shape). Performed on a lower-back bench, Glute Ham Developer, or machines (Cybex, Keiser, Life Circuit). It is the novice low-back selection.
Key facts
- Primary Muscle: Erector Spinae.
- Movement: spinal extension/hyperextension.
- Maintain S-shape spinal alignment; avoid C-shape.
Connections
- Erector Spinae (Sacrospinalis) — primary mover.
- Spinal Column (Vertebral Column) — the spine it extends.
- Spine Range of Motion — spinal ROM.
- Deadlifts (bent knee) / Glute-Ham Developer — related erector-spinae exercises.
Sources
Exercise guides
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Educational content only — not medical advice. Always consult a qualified professional for individualized guidance, especially around injury, pregnancy, or medical conditions.