Warm-Up & Mobility

Happy Baby — Simple Cool-Down Guide

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By Borja Bes — CrossFit Athlete & Hyrox Finisher

Happy baby is a supported floor stretch for the inner hips and lower back. The back stays heavy on the floor while the knees move gently toward the sides of the ribs; holding behind the thighs is completely valid. Use it after training at a gentle intensity, breathe slowly, and stop if the position causes sharp pain, tingling, or numbness.

Quick answer

Happy baby is a supported floor stretch for the inner hips and lower back. Use Happy Baby after training with slow breathing and mild tension only; it should settle the session, not become another workout.

Curated demonstration

Watch Happy Baby Technique

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How to Do the Happy Baby Pose: A Guide from Physical Therapists

Hinge Health · reviewed 2026-08-06

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Muscles Worked

AdductorsGlutesLower back

Equipment

None

Best For, Avoid If, and Scaling

Best forUsing Happy Baby as a calm post-training transition that gently addresses adductors and glutes while breathing and heart rate return toward baseline.
Avoid ifAvoid or scale Happy Baby if sharp pain, tingling or numbness appears. Correct this common fault before adding volume: lifting the tailbone to force the knees lower.
ScalingHold one leg at a time behind the thigh.

How to Do the Happy Baby

1

Lie on the back and draw both knees toward the chest.

2

Hold behind the thighs, shins, or outside edges of the feet.

3

Guide the knees wider toward the sides of the ribs.

4

Keep the tailbone heavy and breathe without pulling.

Common Mistakes

✕

Lifting the tailbone to force the knees lower.

✕

Pulling on the feet hard enough to stress the knees.

Coaching Tips

✓

Hold behind the thighs if the feet are difficult to reach.

✓

A small side-to-side rock should remain relaxed.

Scaling Options

Easier / Beginner

Hold one leg at a time behind the thigh.

Harder / Advanced

Gently extend one leg at a time without lifting the pelvis.

Cool-Down Examples

Use Happy Baby to Finish the Session

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Happy Baby Recovery Reset

happy baby cool-down

2 gentle rounds

30-45 sec Happy Baby

5 slow nasal breaths

Keep every position pain-free

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Post-WOD Happy Baby Flow

post-workout happy baby

4-minute downshift

60 sec easy walk or march

30-45 sec Happy Baby

Finish when breathing feels calm

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Frequently Asked Questions

How should Happy Baby feel?

Happy Baby should create mild, steady tension while you can still breathe normally. Ease out immediately if you feel sharp pain, tingling, or numbness.

Plan the Whole Session

Build a Session Around Happy Baby

Use the generator to create a complete workout with an appropriate cool-down, main training block, and recovery work for your level and equipment.

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Related Exercises

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