Wake Up This "Hidden" Muscle to Fix HUNCHBACK Posture (aka Kyphosis)
If This Muscle Isn't Working, You'll Never Improve Your Posture
Ever catch a glimpse in the mirror and spot a major hunchback posture? Most people don’t know a key to fixing this lies in engaging hidden little muscles.
I bet at least once, you've noticed yourself slouching (perhaps when someone said the word "posture") and you then quickly pinched your shoulder blades together and puffed out your chest. And I also bet it worked for about 2 minutes and before you know it, you were right back to that hunched position with rounded shoulders and your head jutting forward.
Somewhat accurate?
Moving Beyond the Quick Fix for Hunchback Posture
This hunchback posture, also known as thoracic kyphosis, is an exaggeration of the natural curve of our thoracic spine – the 12 vertebrae that make up our mid to upper back.
Image by www.weillcornellbrainandspine.org
When you take the typical postural strategy of firing up your scapular stabilizers to pull your shoulder blades back, you call on superficial muscles like your rhomboids and lower traps to straighten you up.
The problem is that these scapular stabilizers are phasic muscles [1] – meaning they’re made of powerful, fast-twitch fibers that are meant to fire intermittently to produce powerful movements. They also fatigue quickly, which is why they're poorly suited for maintaining good posture.
The Long Spinal Extensors: You're Not Quite There Yet!
Instead, you need to be activating deeper, tonic muscles for postural stability. Tonic muscles are those meant to perform sustained, low level contractions and are more resistant to fatigue. Think of tonic muscles as marathon runners and phasic muscles as sprinters. As such, tonic muscles are well-suited to help you maintain good posture all day.
However, not all tonic muscles are created equal when it comes to fixing that hunchback posture for good.
Once you advance beyond the scapular stabilizers, you might try to recruit the tonic muscles of the erector spinae, but there are some problems with this approach too.
This group of muscles runs the length of your spine - from your pelvis all the way to your neck [2]. Individual muscles in this group usually cross around 8 vertebrae.
Because the muscles are so long and cross so many joints, they aren’t the best way to fix thoracic kyphosis either.
When you engage these muscles, they don’t cause equal extension across all of the vertebrae they cross. Instead, they tend to cause a lot of motion at the most mobile joint, and nothing much else at all of the others.
And since thoracic mobility is an issue for most people, you’re probably pretty restricted along most of your thoracic spine.
This creates something like a hinge point in your back – it may look like you’ve got a bit better posture temporarily, but you haven’t found a true neutral spine.
The Multifidus: Activate These Muscles for Perfect Posture
The only way to address the issue of kyphosis long-term is to go deeper and get at some “hidden” muscle groups – the deep spinal extensors.
Deep to the erector spinae is the transversospinalis group. This group includes the semispinalis muscles, which cross 4-6 vertebrae and provide more targeted extension.
But even more important and the real key is to activate the multifidus muscles. This muscle group spans your entire spine and you may have heard of the multifidus as being important for low back pain, but they're also critical to fighting hunchback posture. These small but mighty muscles cross 2-4 of your vertebrae [3].
Imagine how much precision targeting the multifidus produces. When the muscle contracts, the movement is going to come from a very specific area and cause extension at fewer joints.
By firing up the multifidus, you can create targeted extension at whatever segment you want.
That’s why these deep, tonic, and localized spinal extensors are key to moving beyond the 2-minute fix and getting rid of that hunchback posture for good.
Image by https://www.crossfit.com/
Get Rid of Hunchback Posture for Good with the
4-Point T-Spine End Range Expansion (ERE) Sequence
Now that we understand the why, we can tackle the how.
To do so, I have developed a technique called the 4-Point T-Spine End Range Expansion (ERE) sequence.
In the video below, you'll see the anatomy and learn the biomechanics of the spine and why this technique is so effective at combating hunchback posture.
4-Point T-Spine ERE Instructions
Recommended article: 5 Exercises to Fix Forward Head Posture that Actually WORK
Isolating this movement might feel difficult as first – especially if your posture has been bad for a long time. But keep practicing 2-3 times a week and when you do get the thoracic multifidus fired up, you'll know it and it'll open you up like you've never felt before, allowing you to maintain good posture with ease.
Continue training to build endurance in these muscles, and your posture will get better and better the more you do it and standing up straight will feel like a natural and easy position to maintain throughout the day – whether you’re working out in the gym or standing on the subway.
Editor's note: The hunchback posture video was published in 2019, and since then, we've been humbled to receive countless messages from active people from all sorts of backgrounds, sharing their positive results from trying the technique. Thank you all for sharing, and here are some of the stories that stuck out:
Take the Next Step Toward Better Posture
You’ve just scratched the surface of what it takes to correct rounded shoulders, forward head and that persistent hunchback posture. While stretching can feel good in the moment, it doesn’t address the weaknesses in the deep muscles that allow poor posture to return.
With the Upper Body Posture routines inside the ROM Coach app, you’ll follow a progressive step‑by‑step plan that safely rebuilds strength in the multifidus muscles - the deep muscles of the spine critical to maintaining good posture effortlessly all day long. By targeting the muscles that weaken when you slump, you’ll not only relieve tension - you’ll lock in lasting improvement and resilience against future postural drift.
Say goodbye to quick fixes and hello to a stronger, more aligned you.
About the Author
Eric Wong (aka Coach E) holds an Honours Bachelor of Science in Kinesiology from the University of Waterloo. He’s been a trainer since 2004 and spent many years training professional combat athletes including 3 UFC fighters, so he’s had much experience dealing with injuries. He’s the founder of Precision Movement and has dedicated himself to helping active people eliminate pain, heal & prevent injuries and improve mobility so they can get back to and keep doing the things they love.
