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Exercise database

Side-Lying Clamshell

Side-Lying Clamshell is a beginner isolation exercise that primarily trains the glute medius, with the obliques assisting. Equipment: bodyweight.

Library data updated September 10, 2026BeginnerBodyweight

What this page is: structured data from Handler's own exercise library — the same cues, mistakes, ranges, and modifications the coach uses in the app. It is general exercise information, not an individual technique assessment or medical advice. Stop any movement that causes pain and seek qualified coaching or clinical care for injuries.

Demonstration loop from Handler's exercise library. Only the still frame loads until you press play.

Technique

Form cues for the side-lying clamshell

01
Lock in the body position before the first rep.
02
Move only through the target joint and keep the tempo smooth.
03
Stop each set with one or two clean reps still available.
04
Keep heels together and open the top knee without rolling back.

Troubleshooting

Common mistakes

Swinging the weight.
Changing posture to finish reps.
Cutting the range short.

Programming defaults

Sets, reps, and rest by goal

These are the starting ranges Handler's library assigns to the side-lying clamshell for each training goal. They are defaults the coach adjusts from your logged sets, not a prescription for any individual.

Goal	Sets × reps	Rest between sets
Strength	3 × 8–12 reps	1 min 15 s
Hypertrophy	3 × 10–15 reps	1 min
Fat loss	2 × 15–25 reps	30 s
General fitness	2 × 10–15 reps	45 s

Between sets

Use the same tempo on the next set.
Stop before momentum takes over.

Working around discomfort

Modifications by body area

How Handler adjusts the side-lying clamshell when a lifter reports a sensitive area. These are training modifications, not treatment. Pain that persists or worsens needs clinical assessment.

Hip: Use a comfortable stance and shorten the range if the front of the hip pinches.
Lower back: Reduce load, brace before each rep, and stop if you cannot keep a neutral spine.

Progression chain

Easier and harder variations

Regress to

This is the first step in its chain.

Progress to

Questions about this exercise

What muscles does the side-lying clamshell work?

The side-lying clamshell primarily works the glute medius. The obliques work as secondary or stabilising muscles. In Handler's library it is classified as a isolation movement.

What equipment do you need for the side-lying clamshell?

None. The side-lying clamshell is a bodyweight exercise, which is why it appears in Handler's anywhere setups.

How many sets and reps of the side-lying clamshell should I do?

Handler's default for a strength focus is 3 × 8–12 reps with about 1 min 15 s rest, and for a muscle-building focus 3 × 10–15 reps with about 1 min rest. These are the library's starting ranges, not an individual prescription; the coach adjusts them from what you log.

Is the side-lying clamshell suitable for beginners?

Yes. It is tagged beginner in Handler's library. When it feels easy, the next step in the progression chain is the band lateral walk.

More glute medius exercises

Quadruped Fire Hydrant
Bodyweight · Beginner · Isolation
Side-Lying Hip Abduction
Bodyweight · Intermediate · Isolation
Lateral Shuffle
Bodyweight · Beginner · Warm-up
Band Lateral Walk
Resistance band · Beginner · Isolation
Banded Clamshell
Resistance band · Beginner · Isolation
Cable Hip Abduction
Cable machine · Intermediate · Isolation
Machine Hip Abduction
Hip abduction machine · Beginner · Isolation
Band Lateral Walk Warm-Up
Resistance band · Beginner · Warm-up

Invited TestFlight beta · iPhone-first

Let the coach program the side-lying clamshell for you.

Handler is our product. In the invited iPhone beta, the coach places exercises like this one into your plan, sets the starting ranges shown above, and adjusts them from the sets you log. Test build, not a public download.

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