Short Box Series: Side Bend
Short box lateral flexion with the hand behind the head: the shorter lever keeps the work in the obliques, and the return through centre is where most of the control is trained. The hand-behind-the-head counterpart to Side Over, which reaches the top arm long over the ear.
- Body
- Reformer
- Equipment
- Movement
Teaching Precautions
Common precautions, not exhaustive. Screen every client and refer when in doubt.
- Osteoporosis / Osteopenia: Avoid loaded side flexion; substitute with a small neutral side shift.
- Low Back Pain: Keep the bend through the ribcage and stop if side flexion aggravates symptoms.
Apparatus Setup
Reformer
Target Muscles
Setup Instructions
Sit tall on the short box side-on with the feet secured under the strap, both sitbones on the box, one hand behind the head and the other resting on the hip.
Execution Instructions
Inhale to lengthen tall, exhale to bend the spine laterally over the hip with the elbow opening toward the ceiling; inhale to return through centre with control, then repeat to the other side.
Teaching Cues
"Inhale to lengthen, exhale to bend over the hip."
"Bend from the ribcage, not the waist — keep the hips level and square."
"Keep the elbow open toward the ceiling so the bend stays in the ribs, not the neck."
"Return through centre with the same speed you bent — no collapsing."
Modifications & Progressions
Hand on Hip (Regression)
Rest the top hand on the hip instead of reaching overhead to shorten the lever.
Both Arms Overhead (Progression)
Reach both arms overhead and clasp the hands to lengthen the lever.
Small Side Shift (Injury Modification)
With low bone density, take only a small side shift from neutral with the hand on the hip, and return through centre without loading end range.
Related Exercises
The rest of the Short Box Series family.