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Couch Stretch (Rectus Femoris / Hip Flexor)

Draftstretch85%intermediate⬤ moderate evidence
View FHIR resourceFHIR R4 ActivityDefinition — the interoperable form of this exercise

Positions & Range of Motion

Start
half-kneeling with the rear shin vertical against a wall or couch (rear foot elevated, knee flexed), front foot planted flat, torso upright
End
rear hip driven into extension with a posterior pelvic tilt while the rear knee stays flexed and the front knee travels forward, chest lifted tall — maximal biarticular rectus femoris/hip-flexor lengthening
Range of Motion
combined hip extension and knee flexion to comfortable end-range anterior thigh and hip-flexor stretch, held statically

How to Perform

Half-kneeling with rear foot elevated against a wall or couch. Combines hip extension with knee flexion to maximally stretch the biarticular rectus femoris. Posterior pelvic tilt stretching reduces reactive hip flexor force by 4.85 N·m vs standard stretching. Stretching up to 120 seconds has no negative performance effect.

Watch on YouTube↗

Opens a YouTube search for “Couch Stretch (Rectus Femoris / Hip Flexor)”

Starting position: half-kneeling

Coaching Cues

  1. 1

    Posterior pelvic tilt first — front of hip lengthens

    (verbal)
  2. 2

    Drive the front knee gently toward the wall

    (verbal)
  3. 3

    Lift the chest tall away from the front thigh

    (verbal)
  4. 4

    Tailbone tucks under like closing a wallet

    (tactile)

Evidence-Based Dosing & EMG Data

Recommended Dosing

30-120 seconds per side, 1-3 sets, 3-5 days/week [Konrad 2021]

EMG Activation Data

Posterior pelvic tilt stretching: 4.85 N·m greater reactive hip flexor force reduction vs standard [González-de-la-Flor 2024]

Muscles Involved (3)

Primary Movers

Rectus Femoris— Biarticular — maximally stretched with hip extension + knee flexion
Iliopsoas— Hip flexor stretch in extension

Secondary Movers

Quadriceps Femoris— Knee flexion component stretches vasti

Easier Variations ↓

1

Standard Half-Kneeling Hip Flexor Stretch

Without rear foot elevation. Less rectus femoris bias.

2

Regress to hip-flexor-hamstring-stretch

AUDIT: Drop the knee-flexion component back to a standard half-kneeling hip-flexor stretch if RF stretch is too intense.

Harder Variations ↑

1

Elevated Couch Stretch with Reach

Raise the same-side arm overhead while in stretch. Adds lateral chain and psoas emphasis.

Target Movements (2)

Hip ExtensionHip Joint (Coxofemoral)
Knee FlexionTibiofemoral Joint

Why This Exercise Matters

Everyday activities this exercise helps you do — essential means it directly trains the capacity the task needs:

WalkingRunning and JoggingStair Climbing

Goals This Helps With

Rehab, performance, prevention, and mobility goals this exercise supports — essential means it's a cornerstone:

Improve Hip MobilitymobilityLow Back Painrehab

Evidence Sources (2)