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 best used when the workout goal matches its main demand: warm-up & mobility capacity, clean mechanics, and scalable intensity.

Muscles Worked

AdductorsGlutesLower back

Equipment

None

Best For, Avoid If, and Scaling

Best forWarm-Up & Mobility WODs, skill practice, and athletes who can keep happy baby mechanics consistent under fatigue.
Avoid ifPain changes your movement pattern, fatigue makes reps sloppy, or the workout asks for a standard you cannot repeat safely.
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.

Related WODs

Use Happy Baby in a Real Workout

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Movement Practice WOD

exercise wod

AMRAP 12

8 controlled reps

10 bodyweight reps

200m easy run or 60 sec cardio

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Technique + Conditioning

scaled workout

4 rounds for quality

10 technique reps

30 sec core hold

12 low-skill conditioning reps

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Frequently Asked Questions

How should Happy Baby feel?

You should feel mild, steady tension and be able to breathe normally. Ease out immediately if you feel sharp pain, tingling, or numbness.

Build It Into a Workout

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