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Muscle group

Lower back

The muscles running along the base of the spine that keep the trunk upright and support bending and lifting.

Muscle group

Overview

The lower-back muscles include the erector spinae, a group running vertically along either side of the spine, together with deeper muscles close to the vertebrae. They span the lower half of the back.

Their main role is keeping the spine upright and extending the trunk — straightening up from a bent position — as well as resisting unwanted movement to hold the back steady during lifting and carrying.

Good to know

  • Part of the core, working with the abs and obliques
  • Central to everyday posture and to bending and lifting patterns
  • Often trained through hip-hinge movements alongside the glutes and hamstrings

Where it’s used

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