Exercise guide
Sitting Lumbar Spine Extension
- Intermediate
- Isolation
- Rep-based
- Waist
This isolation exercise targets the erector spinae to improve lower back strength and postural stability while seated. It is particularly effective for counteracting the forward-slumping posture often associated with long periods of sitting.
Reviewed by the Crucible team · Updated June 2026
Muscles worked
Setup
- Sit upright on the edge of a firm chair or bench with your feet flat on the floor, hip-width apart.
- Place your hands across your chest or resting lightly on your thighs.
- Engage your core and pull your shoulder blades back to establish a neutral spine.
How to do it
- Inhale and slowly hinge forward from the hips, keeping your back perfectly straight until your torso is at a 45-degree angle.
- Exhale as you use your lower back muscles to pull your torso back up to the vertical starting position.
- Continue the movement slightly past the vertical point into a controlled lumbar extension, arching the lower back gently.
- Maintain a slow, controlled tempo of 2 seconds down and 2 seconds up, pausing briefly at the peak contraction.
Form checklist
- Keep your chest lifted and avoid rounding your shoulders forward.
- Ensure the movement occurs at the hips and lower back, not by craning the neck.
- Keep your feet firmly planted to stabilize the pelvis.
- Avoid using momentum or 'swinging' the torso to complete the reps.
Pro tips
- Focus on the mind-muscle connection by imagining your spinal extensors shortening as you return to the upright position.
- Think about 'lengthening' your spine toward the ceiling throughout the entire range of motion to maintain decompression.
Make it harder
- Place your hands behind your head in a 'prisoner' position to increase the lever arm and resistance on the lower back.
- Hold a light weight plate or a water bottle against your chest to add external load.
Frequently asked
- What muscles does the sitting lumbar spine extension work?
- The sitting lumbar spine extension primarily targets the erector spinae, and also works the abs and obliques as secondary muscles.
- What equipment do you need for the sitting lumbar spine extension?
- The sitting lumbar spine extension requires no equipment — just your body weight.
- Is the sitting lumbar spine extension good for beginners?
- The sitting lumbar spine extension is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.
Related exercises
- 45 Degree Twisting HyperextensionIntermediate · erector spinae, glutes, and hamstrings
- Alternating SupermanBeginner · erector spinae, glutes, and hamstrings
- Around The World SupermanIntermediate · erector spinae, glutes, hamstrings, and lats
- Around The World Superman HoldIntermediate · erector spinae, glutes, hamstrings, lats, and trapezius