Side Lying Clam
Description
The side-lying clam (clamshell) is a hip activation exercise where you lie on your side with knees bent and lift your top knee away from your bottom knee, mimicking a clamshell opening. The exercise targets the gluteus medius and external rotators of the hip, making it one of the best activation drills for glute med, hip stability, and lower-back health.
Equipment Required
Side Lying Clam Instructions
- Lie on your right side on the floor. Stack your hips and shoulders directly on top of each other.
- Bend your knees to roughly 45 degrees. Stack your left leg directly on top of your right leg.
- Rest your head on your right arm or a pillow. Place your left hand on your left hip to feel the muscle work.
- Brace your core gently. Keep your hips stacked — do not roll backward.
- Keep your feet pressed together. Lift your top (left) knee away from your bottom knee by externally rotating at the hip.
- Continue lifting until you feel the contraction in your upper outer glute. Do not roll your hips back to lift higher.
- Pause briefly at the top, then lower your knee under control back to the starting stacked position.
- Complete all reps on one side, then roll over and repeat on the other side. Add a resistance band around the knees for more challenge.
Side Lying Clam Form & Visual
Side Lying Clam Benefits
- Direct activation of the gluteus medius
- Improves hip stability and balance
- Excellent warm-up before squats and deadlifts
- Helps prevent IT band issues and knee pain
- Useful for rehabilitation and return-to-training
- No equipment needed — works anywhere
Side Lying Clam Muscles Worked
- Gluteus medius
- Gluteus minimus
- Piriformis (deep external rotator)
- Other deep hip rotators
Side Lying Clam Variations & Alternatives
- Resistance Band Clam
- Standing Hip Abduction
- Cable Medius Kickback
- Side-Lying Leg Raise
- Banded Side-Lying Clam
- Reverse Clamshell
- Side Plank Clam
- Hip Bridge with Clam
- Tempo Clamshell (slow concentric)
