Understanding Hypermobility in Babies: What It Means and How to Support Their Movement

If you've ever noticed your baby folding up like a tiny yogi or doing splits with impressive ease, you might have wondered, “Why is my baby super floppy?”. Some babies are naturally more flexible, and that can be totally normal. But if their flexibility seems extreme, it might be something called hypermobility.

So, let’s break down what that means - and how it can affect your baby’s movement as they grow.

What Is Hypermobility?

Hypermobility refers to joints that move beyond the normal range of motion. In babies, this is often due to softer connective tissues that offer less resistance, making limbs appear extra flexible or floppy.

Many babies are naturally more flexible, but when this flexibility begins to impact motor development, it’s worth exploring how you can help support their strength and movement patterns.

How Does Hypermobility Show Up in Baby Development?

Here are some common signs you might notice:

• Your baby appears floppy when picked up, especially in the arms and legs

• They sit with a W-shape position (knees forward, feet turned out)

• They lean heavily on one side when seated

• Rolling, crawling, or sitting up might be delayed

• Their limbs may feel soft and “squishy” to the touch

Hypermobility can make everyday tasks harder for your baby, even though they may not show any pain. They often need to work harder to stabilise their bodies and engage the right muscles.

Should I Be Worried?

Not necessarily. Hypermobility on its own is not a condition—it is a variation of normal. However, if it is affecting your baby’s ability to reach physical milestones, early intervention can help prevent future difficulties.

Babies with hypermobility might take longer to:

• Hold their head up confidently

• Push through their arms during tummy time

• Sit without leaning on their hands or furniture

• Crawl or transition into new positions

Typical Gross Motor Milestones (0–18 Months)

• 2–3 months: Begins to hold head up during tummy time

• 4–6 months: Rolls from back to tummy and tummy to back

• 6–8 months: Sits without support

• 7–10 months: Crawls or moves around on tummy/hands and knees

• 9–12 months: Pulls to stand and cruises along furniture

• 12–15 months: Takes first independent steps and starts walking

• 15–18 months: Walks confidently, squats, and begins to climb

How to help your hypermobile baby

You can support your baby’s development with gentle, structured play that builds strength and awareness:

1. Tummy time every day

   • Helps strengthen the neck, arms, and trunk

   • Use props under the chest to make it easier

2. Encourage floor time over containers

   • Limit time in bouncers or car seats when not in use

   • Let them explore on soft surfaces to develop balance

3. Use side-lying and reaching games

   • Helps build shoulder and trunk control

   • Encourages active movement and crossing midline

4. Correct W-sitting

   • Gently guide legs into a cross-legged or long-sitting position

   • Offer toys to one side to encourage turning and varied positions

5. Play through transitions

   • Practice moving from lying to sitting or sitting to crawling

   • Use visual and sound-based toys to motivate movement

6. Strengthen through fun

   • Roll balls back and forth

   • Use soft play equipment or baby-friendly obstacle courses

     
     

A Quick Note from a Physio

Hypermobility isn’t a “bad thing” - it’s just one variation in how little bodies are built. With the right play-based support and encouragement, your baby can still build fantastic strength, balance, and coordination.

If you ever feel unsure or want tailored advice, don’t hesitate to reach out to a specialist who gets baby movement. That’s what we’re here for.

Got a question about your baby’s movement? Feel free to contact us by phone, email, or via social media - we're always happy to help!

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