Banded Clamshell
The banded clamshell is a side-lying hip exercise in which you open the top knee against a mini band while your feet stay together and your pelvis stays still. It works the gluteus medius and the upper gluteus maximus with little help from the muscle at the front of the hip (TFL), and is widely used in warm-ups and as glute accessory work.
Also called: Clamshell, Hip Abduction Clamshell, Banded Clam, Mini-Band Clamshell · Equipment: band · Pattern: isolation
Step by step
- Place a mini band around both legs just above the knees.
- Lie on your side with your head resting on your bottom arm or a cushion. Bend your hips to about 60° and your knees to about 90°, with your feet together.
- Stack your hips and shoulders vertically and rest your top hand on your top hip.
- Keeping your feet together, open your top knee by rotating at the hip, as far as it goes without your pelvis rolling backwards.
- Pause for one second at the top, where the band tension is highest.
- Take two seconds to bring the knee back down to meet the other knee, keeping tension in the band.
- After the last rep, roll onto your other side and repeat.
- Hips stacked, pelvis still
- Feet together, only the knee moves
- Pause at the top for a second
- Open only as far as your glute takes it
- Two seconds back down
In VALDA, these cues are one tap away on the exercise while you train.
What it trains
| Muscle | Role | Evidence |
|---|---|---|
| Gluteus medius/minimus | Prime mover | C |
| Gluteus maximus: upper (superior) | Secondary | C |
| Hip flexors: tensor fasciae latae (TFL) | Stabiliser | C |
Evidence grades: A = strong research base · B = good · C = limited · D = coaching consensus.
What goes wrong, and the fix
Pelvis rolling backwards
Fix: Keep your hips stacked and open the knee only as far as the pelvis stays still.
Feet separating
Fix: Keep your heels pressed together through every rep.
Hips straightening out
Fix: Keep your hips bent to about 60°, with your feet in line with your hips.
Letting the band snap the knee shut
Fix: Take two seconds to bring the knee down, keeping the band taut.
Rushing the reps
Fix: Pause for one second at the top of every rep.
What the research says
Rehab & prehab · first choiceGeneral fitnessSport performanceEndurance
- What the research measures — Studies of the clam report muscle activation, not strength or growth. There is no direct research comparing set, rep or band schemes for the banded clamshell.
- Glute focus — Research comparing eleven hip exercises found the clam had the highest ratio of glute to TFL activity of any exercise tested.
- Body position — Research on clam variations found a stacked, upright pelvis produced more glute activity than a pelvis rolled back, and gluteus medius activity rose with more hip bend, with about 60° an effective angle.
- Reps and progression — A common approach is 2–3 sets of 10–20 reps per side, moving to a stronger band once the top of the range comes easily. Band tension is hard to measure, so many lifters gauge effort by reps left in reserve, an estimate that tends to under-count.
- Placement — Many lifters use banded clamshells in a warm-up before squats and lunges, or as a late-session glute finisher.
Swap it mid-workout
With VALDA Pro, FLEX offers alternatives like these when you swap an exercise mid-workout.
Log the banded clamshell in VALDA, with these cues one tap away while you train and your history for it in one place.
General information about exercise technique, not medical advice. If you have an injury or a health condition, your healthcare provider is the right person to ask.