Open Exercise

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Catalogue

Clamshell

oec:clamshell

A side-lying hip exercise targeting the gluteus medius and external rotators by opening the top knee while keeping the feet together.

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Also called: Side-Lying Clamshell, Clam

How to do it

Setup

  1. Lie on your side on the floor or a mat, resting your head comfortably on your bottom arm.
  2. Bend your hips to approximately 45 degrees and your knees to roughly 90 degrees.
  3. Stack your shoulders, hips, knees, and feet vertically perpendicular to the floor.

Movement

  1. Engage your core to prevent your pelvis from rocking backward.
  2. Keeping your heels pressed together, raise your top knee as high as you comfortably can using your hip muscles.
  3. Pause for a moment at the top of the movement to emphasize the contraction in the upper glute.
  4. Slowly lower your top knee back down until it touches the resting knee.

Breathing

Exhale as you raise the knee upward and inhale as you lower it back to the start.

Cues

  • Keep heels glued together
  • Do not let your hips roll back
  • Squeeze the side of your hip at the top

Common faults

Rolling the pelvis backward during the lift
Place your top hand on your hip bone to monitor pelvis position, and stop raising the knee before the pelvis starts tilting.
Separating the feet during the repetition
Keep your inner heels lightly pressed together throughout the entire range of motion.

Muscles

  • Gluteus medius prime mover
  • Gluteus minimus synergist
  • Piriformis synergist
  • Gluteus maximus synergist
  • Obliques stabilizer
  • Transversus abdominis stabilizer

Joints

  • Hip: External rotation, Abduction
  • Lumbar spine: Isometric stabilization

Details

Movement
Hip abduction isolation
Modality
Rehabilitation, Strength, Mobility
Mechanics
isolation
Force
not applicable
Laterality
unilateral
Kinetic chain
open
Level
beginner
Equipment
None
Record
Repetitions
Load
bodyweight, not applicable

Related

Sources

This record: CC-BY-SA-4.0.

Data

clamshell.json