Planfit Logo
  • Exercises
  • Community
  • Blog
  • Sign in
Planfit Logo

Copyright ⓒ 2026 Planfit Inc.

InstagramReddit
Exercise Guide
AI Workout Generator
Free Workout Plans
Privacy policy
Terms of Use
Blog
Planfit Logo
  • Exercises
  • Community
  • Blog
  • Sign in

Clamshell

Clamshell gif
Single-sided

About

This exercise stabilizes your pelvis by activating the gluteus medius.

How to Clamshell

Starting Position

1. Lie on your side and bend your knees at about a 90-degree angle.

2. Keep your feet and ankles together.

3. Slightly roll your upper body and pelvis forward so they don't lie back.

Proper Form

1. Keep your feet in place and slowly lift only the upper knee.

2. Fix the position of your hips to prevent the pelvis from tilting backward.

3. Pause for about 1 second at the top, then slowly lower back to the starting position.

4. After the designated number of repetitions, repeat the same on the opposite side.

Breathing Technique

Exhale when you lift your knees and inhale when you lower them.

Precautions

1. Engage your core to prevent your waist and pelvis from moving together.

2. Focus on the stimulation next to your hips rather than raising your knees too high.

3. Concentrate on the feeling of "glute burn" rather than pain.

From the Community

Share your experience, ask questions, and get tips from other athletes.

Clamshell Community

Join the Community →

Clamshell Related Reading

  • Time under tension does matter — just not the way you think
    What Actually Matters

    Time under tension does matter — just not the way you think

    TUT isn't the main driver of muscle size — but it unlocks real aerobic and tendon adaptations. Here's what the research actually shows, per a 2022 review and RCT.

  • Coffee before a workout does help — but only if you time it right, per a 24-study meta-analysis
    Myths Busted

    Coffee before a workout does help — but only if you time it right, per a 24-study meta-analysis

    Pre-workout coffee can sharpen focus and cut perceived effort — but drink it too late and it steals 45 minutes of sleep, per a 2023 meta-analysis of 24 studies.

  • Full-body vs. split training: muscle and strength gains are the same — per a 2024 meta-analysis
    What Actually Matters

    Full-body vs. split training: muscle and strength gains are the same — per a 2024 meta-analysis

    Full-body or split? For muscle growth and strength, the answer is neither — they're equal, per a 2024 J Strength Cond Res meta-analysis of 14 studies.

  • 3 minutes beats 1 minute — and the data on rest periods is clearer than you think.
    Numbers Don't Lie

    3 minutes beats 1 minute — and the data on rest periods is clearer than you think.

    Resting longer between sets builds more strength and likely more muscle. Here's exactly how long to rest, according to a 2024 Bayesian meta-analysis and two RCTs.

  • 3 days a week is enough — and a J Strength Cond Res RCT of 32 athletes proves it works
    Numbers Don't Lie

    3 days a week is enough — and a J Strength Cond Res RCT of 32 athletes proves it works

    Wondering how many days a week to work out? 3 sessions gets the job done — per an RCT in J Strength Cond Res and exercise guideline reviews.

  • 3–5 sets of deadlifts per session is enough — what a 2022 RCT on 2 vs 5 sets found
    Numbers Don't Lie

    3–5 sets of deadlifts per session is enough — what a 2022 RCT on 2 vs 5 sets found

    Wondering how many sets of deadlifts to do? 3–5 working sets is the evidence-based sweet spot — according to a Sports Med meta-analysis and a 2022 RCT.

Curious about a Leg workout plan that includes the Clamshell

Clamshell Alternatives

Barbell Squat

Barbell Squat

Lunge

Lunge

More

Get Personalized Plans
and More detailed guidance with Planfit

Banner Image
Planfit Logo

Copyright ⓒ 2026 Planfit Inc.

InstagramReddit
Exercise Guide
AI Workout Generator
Free Workout Plans
Privacy policy
Terms of Use
Blog