Core Nexus

A targeted tool for stiff lower backs and tight hips.

Two distinct rotating tips.

Work on your hip flexors with two distinct rotating tips in one compact self-massage tool. Choose your tip, then rotate Core Nexus to fine-tune the angle and placement while you control the pressure.

  • Broad psoas tipA wider contact surface.
  • Angled iliacus tipA narrower shape for a different placement.
  • Rotation you controlAdjust the contact angle as you work.
Watch the placement demonstration

See where to place each tip in Diane Carlisle’s step-by-step demonstration.

Clinician Recommended Dr. Goñi Dr. Lang Dr. Dorworth Dr. Sosa Dr. McHale Read their reviews
HSA/FSA Accepted · checkout with flex
$97.00
or 4 interest-free payments of $24.25 with Shop Pay
Color: BLACK
🎁
Add Black Swan — Just $17

Bundle the Black Swan neck, forearms, and hand release tool with your Core Nexus — normally $37, yours for just $17. Discount applied at checkout.

SAVE $20
Free shipping
≤5 business days
30-Day Guarantee
Lifetime Warranty
Made in USA
About The Core Nexus

Two muscles, two tips, one tool. Core Nexus has a broad tip designed for the psoas and a narrower angled tip designed for the iliacus. Adjust placement and pressure according to the product instructions.

The tool also has uses for the glutes, piriformis, TFL, and glute medius. These are different locations from the psoas and iliacus; consult the corresponding video guide.

Single-piece industrial-grade TPU. Dimensions: 5.5″ × 3.5″ × 5.13″. Weight: under 1 lb. Made in the USA. U.S. patented design.

Core Nexus — U.S. Design Patent No. D1,150,495.
Patent information

What’s Included

The Core Nexus tool, quick-start guidance, and access to the video tutorial library. Any bundle add-on is shown separately in your cart.

Free US shipping. Please read the 30-day return policy and lifetime warranty for eligibility, return shipping, exclusions, and replacement limits.

Before You Use It

Suitability, fit, and experience vary. Read the safety information and seek guidance from your healthcare professional before use. This tool is not a substitute for professional assessment or care.

Use gentle, controlled pressure. Stop if use causes pain, numbness, tingling, or other concerning symptoms.

Explore the Core Nexus product guide →

A quick look

See Core Nexus in action.

Two distinct rotating tips. See the placement and movement.

28 seconds · Sound optional · Key points shown on screen

Perspectives on Core Nexus

What practitioners
and customers say

The way it moves

“...a nice design that allows you to roll with it...”
Dr. Dan Lang, PT, DPTRoots Physical Therapy
& Performance

Two distinct tips

“The two different tips are excellent...”
JohnnyAmazon review
Shown on NHT

Everyday use

“...fits right into my evening routine.”
K. PattonAmazon review
Shown on NHT

The Core Nexus design

Two distinct rotating tips.
One compact tool.

A different shape for each hip flexor.
A contact angle you can adjust.

Anatomy diagram labeling the psoas and iliacus in their different locations.

Why two tips?

Two muscles. Different shapes.

Your hip flexors include the psoas and iliacus. They sit in different locations and have different shapes. That’s why Core Nexus gives you a different contact shape for each.

Woman using the red Core Nexus while resting her body on the tool.

A shape for each placement

Broad psoas tip
A wider contact surface designed for the psoas.
Angled iliacus tip
A narrower, angled shape designed for the iliacus.

Rotation you control

Fine-tune the angle
with your body.

Core Nexus rotates with your body as you shift your position, letting you adjust the contact angle and pressure.

A simple place to start

Get comfortable with your Core Nexus.

Choose your tip. Find your position.
Stay in control of the pressure.

  1. Choose your tip.

    Broad for the psoas. Angled for the iliacus. Start with the placement guide for the area you want to work on.

  2. Find your position.

    Follow the demonstration and ease into comfortable pressure. Take your time getting familiar with the placement.

  3. Adjust with your body.

    Shift your position to rotate Core Nexus and fine-tune the contact angle. More pressure isn’t the goal.

Watch Diane demonstrate both placements.

A step-by-step guide with certified massage therapist Diane Carlisle.

5 out of 5 stars
“As a certified massage therapist, I find the Core Nexus to be an exceptional tool for releasing tension in the iliopsoas. This muscle group is often challenging and time-consuming to manipulate, but the Core Nexus can be easily positioned and rotated to provide effective self release.”
Diane Carlisle, CMTCertified Massage Therapist — Verified Purchase
Placement and safety guide ↗

Compare the tools in action.

See how each tool’s shape affects placement. Start with Core Nexus, then compare the other tools.

Core Nexus 0:31
Start here

Core Nexus

Get a closer look at the broad psoas tip and angled iliacus tip.

Thrival Deep Tissue Pro 0:47

Thrival Deep Tissue Pro

See the curved tip in use, then its size beside Core Nexus.

Hip Hook 0:41

Hip Hook

Compare the narrow hook with the broader Core Nexus tip.

Pso-Rite 0:30

Pso-Rite

See the paired tips and the iliacus-placement demonstration.

Two distinct tips. One Core Nexus.

Choose your Core Nexus

Beyond your hip flexors

One compact tool.
More ways to use it.

From the psoas and iliacus to the lower back, glutes and hamstrings, explore different placements with the same Core Nexus.

Size
5.5 × 3.5 × 5.13 inches
Material
Industrial-grade TPU
Made in
USA
Colors
Black · Blue · Red

One-piece construction. No assembly or batteries.

See Core Nexus used on the QL, glutes, psoas and iliacus.

Enlarged Core Nexus use demonstrations for psoas, iliacus, quadratus lumborum, hamstrings, TFL and glutes

Lower-back & hip routine

Loading the full demonstration…

FREE COMPANION APP

Your tool.
Your routine.
A little guidance.

Meet Nexus Recovery Coach. Learn the placements and build a routine around your Core Nexus or Black Swan.

  • See where to start. Real placement videos.
  • Follow your routine. Guided steps and timers.
  • Make it yours. Save your favorite routines.
Explore Recovery Coach

Free to use. No account needed.
Open on your phone and add it to your Home Screen.

See the placement.Real demonstrations, ready when you are.
Find your routine.Save the ones you want to use again.

Tap a phone to see the real app screen larger.

Enlarged Recovery Coach screen
  • 5 stars: 35 (95%)
  • 4 stars: 2 (5%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
K
Kathryn Evans
Why: I get really tight in the hip area.
What: The muscles are so overused because I run track
Effectiveness:
OK
Amazing!
Great for Athletes! Definitely would recommend

I love the duality of the core nexus! As a track athlete it is very common to have tight hip flexors and muscles around that area because of the constant contractions performed during running.
The core nexus gave an almost instant release of the muscle without needing help from PT. I think it's a great mobile and convenient tool to take care of your muscles!

R
Reginald E. Taylor
Core Nexus Psoas Release

I really enjoy the Core Nexus and it has really helped me release my hips and gets me ready for the court by rotating deep into my psoas! I also like how it has helped me release my hamstrings too deep release of these muscles

J
Jon
Awesome Product!

I’ve been using the Core Nexus for a few days now and I’m really impressed. Whether I’m throwing lefty or righty, it gets me loose and ready. It’s easy to use, simple to place, and feels like a high-quality device. I’ve been watching videos to learn how to get the most out of it, and so far everything has been smooth. Definitely recommend it to any pitcher looking for a reliable tool like this.

W
Wendy Brown
5.0 out of 5 stars Core Nexus is great for the hips!

I highly recommend the Core Nexus, it has helped me improve mobility in my hips by easily enabling me to release my psoas and iliacus! It is compact and does a great job of getting deep into my muscles for a great release. And as a collegiate basketball 🏀 player being able to change direction quickly and move freely is a must, and the Core Nexus helps me do that!!

A
Adrienne
I love the Core Nexus!

I love the Core Nexus and the way it is so easy to find the psoas and iliacus muscles! It has really improved my hip mobility along with all of my leg muscles. I have always had bad hips and mobility which caused me to pull other leg muscles but with only one week of using the Core Nexus, I already feel looser and more agile! I would really recommend this product!

S
Stephanie Zeno
Great tool

As a college lacrosse player, recovery is everything and the Nexus Health Tool has seriously become a game-changer in my routine. I’m constantly dealing with tight hips, sore quads, and the usual post-practice aches, but this tool helps me target those deep muscles I usually can’t get to with a foam roller alone. What I love most is how easy it is to use on my own especially for areas like the psoas and iliacus that are hard to release without a trainer. After using it consistently, I’ve noticed a big difference in how my body feels during speed work, lifts, and even just walking around campus. It’s compact, durable, and fits right into my sideline bag so I can use it between classes or right after a workout. Honestly, it’s one of those tools I didn’t know I needed until I tried it. Highly recommend it to any athlete looking to stay loose, recover faster, and perform at their best!

T
Troy Horne
Core Nexus Helps Athletes!

As a collegiate basketball player I use the Core Nexus to alleviate tightness in my hips before my workout. I love this tool because it helps with my mobility and is a vital tool I use before I train!

T
Tamara
Must-Have for Athletes and Lifters

The product felt amazing on my hamstrings, really got in deep and relieved a lot of tightness I had been dealing with. After just one use, I noticed improved flexibility and less soreness. It’s definitely one of the best tools I’ve used for muscle recovery. Highly recommend to anyone looking to step up their recovery game!

S
Seth Augustynowski
Multifunctional and Small Size Accessibility

This tool is great for multifunctional use, making itself able to treat a variety of different areas depending on the issue at hand. It’s small which makes it easy to carry around for sports competition with just being able to have it stored in your bag

J
James Whitaker
Great tool for psoas and iliacus release

Love this tool! Gets into the psoas and iliacus perfectly. Easy to use and effective!

T
Thatcher Baughman
Best hip release tool

This tool is awesome for hip mobility. It’s easy to use and compact, so I can take it to my baseball practice and games and use it during warm ups to get me ready to perform my best!

M
MnM
Helps relieve hip tightness!

The Core Nexus tool has been a staple to my everyday routine and has helped relieve muscle soreness. Super transportable, effective and easy to use!

N
Natalia Bowles
Game-Changer for Athletes!

As a college soccer athlete, I’m always looking for tools that help with recovery, mobility, and injury prevention. The Core Nexus has been a complete game-changer for me! After intense training sessions and games, my hip flexors and lower back can get super tight, but this tool provides deep, effective relief like nothing else I’ve tried. The stability of the Nexus is impressive—it stays in place while I use it, allowing for precise, controlled pressure on my psoas and iliacus muscles. It’s easy to use, durable, and truly helps with flexibility and recovery. Whether it’s for muscle maintenance or post-game recovery, I highly recommend it to any athlete looking to improve performance and prevent injuries. If you’re serious about mobility and recovery, this is a must-have!

T
Trevor Testerman
5.0 out of 5 stars Fantastic Mobility Tool

The Core Nexus Health tool has been a great tool in enhancing my flexibility in many ways. I am a two sport college athlete playing both baseball and football and this tool has helped ensuring my optimal performance in both respective sports. I also use this tool before workouts as well and find it beneficial before performing workouts such as squats or deadlifts. I find it very stable when using it on my psoas and iliacus muscles, as having both of these muscles loose and free is crucial for my success on the field. I have had experience with SI joint issues in the past and this tool has helped alleviate that pain and I continue to use it for preventative care. If you need to relieve pain or enhance performance I would highly recomend the Core Nexus!

K
Katie
Best Tool Ever!

I have dealt with hip flexor tightness and pain for years. This tool has helped me so much in keeping my hip flexors ready to go for my lifting and my pitching! I use it for both recovery and for warming up!

K
K. Patton
Fast relief from years of back pain!

Most of my day is spent working at a computer, I’ve struggled with lower back pain for years. I decided to give the Core Nexus a try, and I’m so glad I did! After just a week of using it for a few minutes each night while watching TV, I felt fast relief from my lower back pain. It’s easy to use and fits right into my evening routine. If you’re like me and spend hours sitting at a desk, I highly recommend the Core Nexus. It’s made a world of difference for my hip flexors and lower back!

H
H. Lau
Game changer for hip flexor relief!

As someone who's been involved in athletics my entire life, tight hip flexors have always been a nagging issue messing with my performance. I've tried virtually everything from stretching routines, foam rollers, and even regular visits to the physical therapist, which helped the most, but I always end up needing to go back for more work on these muscles. Then I tried the Core Nexus. This tool is a total game-changer! It lets me target those deep hip muscles (psoas and iliacus) whenever I need. Not only has it boosted my flexibility, but it's also saved me time and money on therapy sessions. The Core Nexus is now a key part of my daily routine, and I highly recommend it to anyone looking to take control of their hip health.

K
KHarrison
This tool delivers!

As someone that is all too familiar with the discomfort of tight hip flexors, particularly the psoas and iliacus muscles, I was super excited to add this Core Nexus Rotating Psoas Release Tool to my mobility and pain relief routine. After using this for several weeks, I can say it is an effective, well-designed tool for targeted muscle release of the psoas and iliacus. The tool’s unique rotating head allows for controlled, deep tissue work that hits those hard-to-reach areas in the psoas and iliacus muscles. The ergonomic design fits well under the body, providing good leverage for applying pressure and using my body to rock and release or bending my leg up and down. I watched the instructional videos and have had enough work on my psoas to know I am placing it in the correct spot! The rotating mechanism allows you to gradually work into the tight spots, and the base stays stable on the ground, giving you control without slipping. I found it surprisingly easy to adjust the pressure for more or less intensity as needed. After just a few sessions, I noticed significant relief in my hip flexors and lower back, areas that are often tight for me. I am hoping that consistent use will help improve my flexibility and reduce the nagging tension I usually feel in my hips after long runs or heavy lifting days. It is made from high-quality, durable materials - this tool is built to last. It's also compact, making it portable enough to throw in a gym bag or take along while traveling. If you struggle with lower back pain, hip tightness, or general stiffness, this tool can make a noticeable difference in your recovery and mobility – it did for me!

A
Amazon Customer
I love this tool!

My chiropractor works my psoas regularly, this feels exactly like what she does but I can control the pressure and ease into it. I just started working the iliacus for about a week now and WOW, I feel less lower back pain already and free in the hips! This Core Nexus tool is amazing!

J
Johnny
Blown Away!!

I have gone through all the other psoas or iliacus tools on the market and this is far and away the best of all of them! The two different tips are excellent at getting to the psoas and iliacus. It’s high quality and I know this tool will never break unlike others I have had. Also what I like the most is now I have one great tool to do it all, and it is really convenient that I can do my Glute Medius, Quadratus Lumborum, and Tensor Fasciae Latae too, as these have been trouble areas for me as well. Considering I paid $200 for a tool that only releases the iliacus, this tool is a bargain because not only does it release the iliacus way better, it releases all the muscles I need to work on. I can’t recommend this tool enough!

D
Daniel
Impressive

Small tool but packs a big punch. Please read the safety warnings and watch the videos so you don’t hurt yourself. Comes with link to a bunch of helpful how to videos. Seems like A lot of thought went into the shape. It gets right to the right spot to release tight muscles. Give it a try

The details that matter

Feel clear about your purchase.

Payment options, shipping and support—easy to find before you order.

Shipping

Free US shipping

Free shipping on every US order. Processing: 1–2 business days. Estimated US delivery: 5 business days or less. No minimum—including the $37 Black Swan.

Shipping details

Returns

30-day returns

Request a return within 30 days of delivery. Keep the original packaging and return the tool in like-new condition. Return shipping is your responsibility unless it arrived defective or damaged.

Full return terms

Built to last

Lifetime limited warranty

Manufacturing flaws are covered for the original purchaser, with up to one complete replacement per product. Exclusions apply.

Warranty coverage

Questions before ordering? Contact our team.

Use your FSA/HSA with Flex

Core Nexus is FSA/HSA eligible. The store’s Flex guide shows these steps:

  1. Check out as a guest.
  2. Select Flex | Pay with HSA/FSA from the payment options.
  3. Follow the prompts to enter your FSA/HSA card details.
View the existing Flex checkout guide

A few final questions

Good to know before you begin.

What comes with my Core Nexus?
Your Core Nexus tool, quick-start guidance and access to video tutorials. Choose black, blue or red. Black Swan is a separate, optional add-on; it is not included with the single Core Nexus.
Do I need experience with a release tool?
The placement demonstrations walk you through both tips. Start with Diane’s step-by-step guide and get familiar with comfortable positioning before increasing pressure. See the placement demonstration.
Can I add the Black Swan?
Yes. The current optional offer adds Black Swan for $17 when purchased with Core Nexus: $114 for both. Choose the bundle in the buying area. See the optional bundle.
How much pressure should I use?
Begin gently and stay within a comfortable range. More pressure is not the goal. Stop if you experience pain, numbness or tingling, and follow the placement instructions.
Is Core Nexus right for everyone?
Suitability depends on your body and health history. Review the complete safety information and ask your healthcare professional before use, especially if you have an injury or medical condition. Core Nexus is intended for adults.

Looking for more detail? Visit our complete FAQ.

Bryan Lee

Bryan Lee

Founder & Inventor

MECHANICAL ENGINEER

Built from personal experience and a focus on product design.

Bryan explored psoas and iliacus tools, then spent 18 months engineering, prototyping, and testing Core Nexus. His aim was a compact tool with two distinct contact shapes: one for the psoas and one for the iliacus.

His personal experience inspired the product. It does not predict another person’s experience or replace professional advice.

Core Nexus wasn't created to start a business. It was created because this tool needed to exist.

Read Bryan's full story →