Seated Lower Trunk Extensor Lateral Flexor Stretch

1. Sit on the floor with legs extended and spread comfortably wide, toes pointing up.
2. Sit tall, lifting the chest so the pelvis is upright rather than rolled backward.
3. Raise the right arm overhead, then reach it across and down toward the left foot.
4. Let the torso bend sideways and slightly forward, keeping the left hip anchored to the floor.
5. Place the left hand on the left shin for support and breathe into the right side of the lower back.
6. Hold the stretch, then return to upright with control and repeat toward the right foot.

Common Mistakes

• Rounding the upper back: Collapsing the chest shifts the stretch into the thoracic spine and shoulders. Reach long through the fingertips and keep the chest open as you bend.
• Opposite hip lifting: When the far hip rises off the floor the pelvis follows the torso and the lateral flexors do not lengthen. Press that sitting bone into the floor throughout.
• Bouncing into range: Pulsing at the end range tenses the erectors and reduces the stretch. Settle in, exhale, and let the range come gradually.

Programming Tips

Perform 2 to 3 sets of 30 to 45 seconds per side at the end of a lower body or deadlift session, or as a standalone mobility piece on rest days. It belongs in the cool-down, after the back is warm, and serves to restore side bending and reduce the stiff, locked feeling in the low back after heavy hinging.

Set the legs as wide as the hamstrings comfortably allow; if sitting tall is hard, raise the hips on a folded towel. It is bodyweight only, so progress by reaching farther and holding longer, never by forcing with a partner. The most common fault is rounding and reaching with the shoulders instead of bending from the trunk; fix it by leading with the ribcage and keeping the reaching arm by the ear.

Common Questions

What muscles does the seated lower trunk lateral flexor stretch work?

It targets the erector spinae, quadratus lumborum and obliques on the side opposite the reaching arm. The hamstrings and adductors of the target leg get a secondary stretch.

How often should I stretch my lower back?

Daily is fine for a gentle stretch like this, with 2 to 3 holds per side. After heavy deadlift or squat days it is most useful in the cool-down.

Is this stretch safe with a herniated disc?

Usually yes if the pain stays away during the hold, since the movement is mostly side bending rather than deep forward flexion. Stop if you feel pain down the leg and get cleared by a clinician first.

Seated side reach or standing side bend for the lower back?

The seated version anchors the pelvis and isolates the trunk better. The standing side bend is quicker but easier to cheat by shifting the hips.