The only tool engineered to release both your psoas and iliacus, the two muscles behind most lower back and hip tension.
Clinician Recommended
Read their reviews
Bundle the Black Swan neck, forearms, and hand release tool with your Core Nexus — normally $35, yours for just $15. Discount applied at checkout.
Your hip flexor is actually two separate muscles — the psoas and the iliacus. Most tools are shaped to reach one of them and hope for the best on the other. That's why the results don't last.
Core Nexus was designed with two different tips, each engineered for the muscle it targets. The broad tip applies firm, even pressure along the psoas where it runs deep beside your spine. The narrow tip angles into the iliacus where it hides inside the curve of your pelvis. You rotate between them without getting up or repositioning.
But it doesn't stop at the hip flexors.
The same dual-tip geometry lets you work the muscles on the back side of your hip — glutes, piriformis, TFL, glute medius — the areas that tighten up when your hip flexors are locked. Other brands sell you a second tool for that. Core Nexus handles front and back in one session, with one tool, on your floor.
Precision 3D-printed from industrial-grade TPU. One-piece construction — nothing to assemble, nothing that breaks. Handles your full body weight. Made in the USA. Patent pending.
Dual-tip release tool with rotating design for adjustable angle and pressure. Targets the psoas, iliacus, glutes, piriformis, TFL, and glute medius. 5.5″ × 3.5″ × 3.13″ — under 1 lb.
Follow-along instruction showing exactly where to place the tool, how to adjust pressure, and how long to hold each release. No guessing.
Use it for a full month. If it's not for you, return it.
3D-printed TPU doesn't crack, warp, or wear out. But if something ever goes wrong, we replace it.
Ships from the USA. No surprises at checkout.
If you've been through the cycle — stretching, foam rolling, massage guns, yoga, even professional bodywork — and the tightness keeps coming back, there's a reason. Most of those approaches don't reach the psoas and iliacus, the two deep muscles that sit at the center of your hip and core alignment. When they stay tight, everything around them compensates — your lower back, your glutes, your hips, your knees.
Core Nexus was built specifically to reach them — both of them — in a way that foam rollers, lacrosse balls, and single-tip tools physically cannot. The dual-tip design matches the anatomy: broad pressure for the psoas, precise angled pressure for the iliacus. You control the depth and rotation.
People using Core Nexus tell us they feel a difference in:
Who uses it:
Desk workers who sit 8+ hours a day. Runners, golfers, CrossFit athletes, and weekend warriors. Yoga practitioners working on deeper hip openers. Anyone whose hips feel stuck no matter what they've tried.
Not sure if this applies to you? Take the quiz — it takes about 60 seconds and shows you exactly which muscles are likely contributing to what you're feeling.
Take the Quiz →Core Nexus targets both the psoas AND iliacus muscles, other tools can only reach one or the other. That's why it works.
Short on time? Watch the quick demo and see how simple it is.
The psoas and iliacus are the deepest muscles in your body -- connecting your spine to your legs. When they tighten from sitting, stress, or overuse, they pull your entire body out of alignment. But every existing tool only targets one of them.
Every day you spend stretching, foam rolling, or popping ibuprofen is another day wasted on symptoms.
Meanwhile, your psoas and iliacus stay locked tight -- pulling your spine out of alignment, sending pain down your legs, up your back, and into everything you do. The stiffness when you stand up. The ache that wakes you at 3 AM. The weekends you spend on the couch instead of living your life. It does not get better on its own. It gets worse.
Core Nexus was purpose-built with a dual-tip design — one tip for the psoas, one for the iliacus. It's the only tool that reaches both muscles the way a skilled therapist's hands would.
Core Nexus was engineered with two distinct tips — one for your psoas, one for your iliacus. No guesswork, no learning curve, no therapist needed.
Lie face-down and place Core Nexus on your psoas or iliacus. The ergonomic base stays stable — no balancing, no sliding.
The wider tip targets your psoas deep in the abdomen. Reposition to the contoured tip to reach the iliacus inside your hip bone. Rotate your leg outward to deepen the release.
Stand up and feel the difference. Your hips are free, your back feels lighter, and your body moves the way it should.
Follow along and see how easy Core Nexus is to use. A certified massage therapist walks you through it — from placement to release.
"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."
From chiropractors to MDs to massage therapists — movement professionals trust Core Nexus for their clients and themselves.
"Absolutely love the Core Nexus Tool! It releases so much tension in my psoas and iliacus — feels like a deep reset every time I use it. Super effective and easy to use, whether it's morning, night, before or after training. It's become a daily essential in my recovery routine. Highly recommend!"
"Core Nexus addresses both the psoas and iliacus — nice to have that utility. I prefer the material to the Pso-rite and Hip Hook, which are a lot more aggressive. More attainable for your average person. It's got a nice design that allows you to roll with it and get into those muscles we know can be problematic in people with back tension or hip issues."
"As a doctor of physical therapy, I highly recommend the Core Nexus. This compact all-in-one tool is specifically designed to release the psoas and iliacus muscles, which are often the root cause of lower back and hip tension. It targets these stubborn deep muscles easily and quickly with its unique rotating two-tip design. When I use this, I experience a deep release and it makes me feel fantastic. Just 2 to 3 minutes on each side is all it takes. It's extremely high quality and durable."
"I cannot speak highly enough of such an amazing product. For anyone suffering from low back or hip tension, the Core Nexus will specifically hit all of those targeted areas. As a chiropractor and also one who suffers from these conditions, it is a valuable tool and provides significant relief. This device can also be used on multiple areas of the body which is an added bonus. The Core Nexus does not disappoint. You will love it just like I do."
"The dual-tip concept is genuinely innovative. I see the psoas-iliacus connection contribute to low back tension every single day in my practice. Core Nexus gives patients an effective way to maintain their adjustments at home between visits."
The psoas and iliacus are connected to more pain patterns than most people realize. Tap any card to see the connection.
Every one of these starts with the same two muscles.
Get Your Core NexusNot all hip flexor tools are created equal. Here's how Core Nexus stacks up against everything else on the market.
| Feature | Core Nexus | Identical Tip Tools | Small Curved Tips | Multi-Piece Systems |
|---|---|---|---|---|
| Targets Psoas | ✓︎ | ✓︎ | ✗︎ | ✓︎ |
| Targets Iliacus | ✓︎ | ✗︎ | ✓︎ | ✗︎ |
| Back-of-Hip Release (No Extra Tool) | ✓︎ | ✓︎ | ✗︎ | ✓︎ |
| Dual-Tip Design (2 tips, 2 muscles) | ✓︎ | ✗︎ | ✗︎ | ✗︎ |
| Rotation-Based Release | ✓︎ | ✗︎ | ✓︎ | ✗︎ |
| Single-Piece (No Assembly) | ✓︎ | ✓︎ | ✓︎ | ✗︎ |
| Travel-Friendly | ✓︎ | ✗︎ | ✗︎ | ✗︎ |
| Lifetime Warranty | ✓︎ | ✗︎ | ✗︎ | ✓︎ |
Our founder Bryan tested every major hip flexor tool on the market — on camera. See exactly why he built Core Nexus.
5:23
Adjustable pieces sound great in theory. In practice? Watch what happens when Bryan tries to reach both muscles.
4:15
Bryan tests the $219 Hip Hook and quickly finds out it cannot reach the psoas.
3:45
Identical tips mean identical limitations. Watch Bryan demonstrate why a single-tip design falls short.
6:10
The full breakdown: why Core Nexus is the best tool for both the psoas and the iliacus.
Seen enough? One tool. Both muscles. Zero compromises.
Get Core Nexus — $97Answer 3 quick questions. We'll show you exactly which muscles are likely involved and how Core Nexus can help.
Select all that apply
See how Bryan uses Core Nexus on the QL, glutes, psoas, and iliacus as part of the lower-back and sciatica routine he uses himself.
19-Minute Protocol
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
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.
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!!
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!
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!
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!
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!
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
Love this tool! Gets into the psoas and iliacus perfectly. Easy to use and effective!
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!
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!
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!
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!
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!
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!
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.
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!
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!
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!
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
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, CMT**
Diane, thank you for your kind endorsement. Our goal was to design the most time efficient and effective tool for releasing the iliopsoas.
We're confident Core Nexus will change how your body feels. If it doesn't, we'll make it right — no questions, no hassle.
Use it daily for a full month. If you don't feel a genuine difference in your hips and back, return it for a complete refund. We'll even cover return shipping.
Core Nexus is built to last — industrial-grade materials, no moving parts, nothing to break. But if anything ever goes wrong, we replace it. Period.
Core Nexus is the only tool with two distinct tips engineered for two distinct muscles. The wider tip targets the psoas (deep in your abdomen), while the contoured tip reaches the iliacus (inside the bowl of your hip bone). It also features a rotating base that lets you adjust pressure depth and angle. Other tools use identical tips or only address one muscle — leaving half the problem untreated. Core Nexus is made in the USA from TPU, is patent pending, and includes a lifetime warranty.
The psoas and iliacus are two separate muscles that work together as the "iliopsoas" — your primary hip flexor group. The psoas originates along your lumbar spine (lower back) and runs deep through the abdomen. The iliacus originates along the inside of your hip bone (iliac fossa). They merge into a common tendon that attaches to the femur.
Because they have different origins and different shapes, they require different types of pressure to release effectively. The psoas responds to broad, firm pressure. The iliacus requires narrow, angled pressure to reach along the inside of the hip bone. This is why tools with identical tips can only fully address one muscle.
Foam rollers and lacrosse balls work on surface-level muscles — they literally roll over the hip flexors without reaching them. The psoas sits deep in the abdomen, and the iliacus lines the inside of your hip bone. No amount of rolling will access either one. Core Nexus is shaped specifically to reach these structures with targeted, sustained pressure.
Yes. The psoas and iliacus are two distinct muscles with different locations and angles of access. The wider tip targets the psoas deep in the abdomen. The contoured tip reaches the iliacus inside the bowl of your hip bone. Using only one tip is like stretching one leg and not the other — you’re leaving half the problem untreated.
There's a difference between discomfort and pain. If your psoas and iliacus are tight, you'll feel productive pressure — similar to a deep tissue massage. You control the intensity with your body weight. Most users describe the sensation as "hurts so good" and feel noticeably lighter afterward. Start gently and increase pressure as your body adapts. If you feel sharp or shooting pain, stop immediately and consult a healthcare provider.
Most people notice a difference after their very first use — especially when standing up and walking afterward. The hips feel more open and the lower back feels lighter. For lasting change, consistent daily use over 2–3 weeks is recommended. That's when chronic tension patterns start to permanently shift.
Many people with back issues find psoas and iliacus release helpful because tight hip flexors contribute to spinal compression. However, we always recommend consulting your healthcare provider before starting any new recovery tool, especially with existing spinal injuries. Start with very light pressure and short sessions.
Yes. Core Nexus works across all body types because you control the pressure with your own body weight. The ergonomic design accommodates different hip structures, and the two tips are shaped based on anatomical research covering a wide range of pelvic geometries.
The best psoas release tool targets both muscles in your hip flexor — the psoas and the iliacus. Most tools only address one. The Core Nexus is the only dual-tip design with two anatomically distinct tips: a wider tip shaped for the psoas (which runs deep along the lumbar spine) and a contoured tip for the iliacus (which lines the inside of the hip bone). It also features rotation for hands-free pressure adjustment. Made in the USA, patent pending, with a lifetime warranty.
The iliacus muscle sits along the inside of your hip bone, making it nearly impossible to reach with stretching, foam rolling, or massage balls. To release it at home, you need a tool with a narrow, angled tip that can reach into the iliac fossa. Place the tool at your hip crease while lying face-down, then gently sink your body weight onto the tip. Slowly rotate your leg outward to engage the muscle against the tip. The Core Nexus has a dedicated iliacus tip designed specifically for this — its contoured shape follows the curve of the hip bone for effective at-home release.
Yes. When the psoas and iliacus muscles are chronically tight, they pull your pelvis into anterior tilt (forward tilt). This compresses the lumbar spine, shortens the lower back muscles, and can contribute to deep lower back tension, SI joint dysfunction, and even nerve irritation. This is especially common in people who sit for long periods — desk workers, drivers, and frequent flyers. Releasing both the psoas and the iliacus can reduce this forward pull on the pelvis and relieve the compression on the lower back.
Tight hip flexors — specifically the psoas — can contribute to radiating symptoms. A chronically tight psoas pulls the lumbar spine forward, compressing the vertebral discs and potentially irritating the nerve roots. While tight hip flexors are not the only cause of radiating tension, releasing the psoas and iliacus can reduce lumbar compression and may help alleviate some radiating symptoms. If you have a diagnosed condition, consult your healthcare provider before starting any new self-care approach.
A psoas release tool uses your body weight to apply sustained pressure to the psoas and/or iliacus muscles. You lie face-down on the tool, positioning the tip at your hip crease — the area between your hip bone and your navel. As you relax your body weight onto the tool, the pressure reaches the deep hip flexor muscles that foam rollers and stretching cannot access. The sustained pressure triggers a myofascial release response — the muscle gradually relaxes and lengthens.
Stretching primarily targets the muscle-tendon junction and the outer layers of the muscle. The psoas and iliacus are deep muscles buried under layers of tissue. Static stretching can lengthen them temporarily, but it often doesn't release the deep fascial adhesions and trigger points that cause chronic tightness. A psoas release tool applies direct, sustained pressure to the muscle belly itself — reaching the deep tissue where tension actually accumulates. Many people find that combining tool-based release with stretching produces significantly better results than stretching alone.
Core Nexus is recommended by sports medicine physicians, chiropractors, physical therapists, and massage therapists for at-home hip flexor maintenance between clinical sessions. Clinicians note that the dual-tip design addresses both the psoas and iliacus — something most consumer tools cannot do — and that the rotating mechanism allows patients to achieve effective releases without assistance.
Yes — and that’s intentional. Core Nexus is manufactured using industrial-grade additive manufacturing with industrial-grade TPU (thermoplastic polyurethane) — the same material class used in orthotic insoles, industrial components, and high-performance equipment. We chose this method because the dual-tip geometry physically cannot be made with injection molding.
Because the Core Nexus cannot be made with injection molding. Injection molds require simple shapes that can release from a two-part mold. The dual-tip rotating design, precision contact angles, and compound curves would be impossible — or require six-figure tooling. We chose the manufacturing method that serves the design, not the other way around. It costs more per unit. We do it because it produces a better tool.
Use Core Nexus for up to 30 days. If you don't feel a genuine difference, email us at support@nexushealthtools.com. We'll send you a prepaid return label and issue a full refund. No hoops, no restocking fees.
Every Core Nexus order includes the dual-tip tool, a quick-start guide, access to video tutorials, and a lifetime warranty. All orders ship free within the United States and include our 30-day money-back guarantee. Want the full recovery kit? Add the Black Swan neck, forearm, and hand release tool for just $15 (normally $35).
"I spent almost a year stuck in bed. Constant low back tension and tension stole everything I loved — basketball, paddle boarding, weekends with my wife. Nothing worked. I refused surgery."
Bryan tried every tool on the market. Some partially helped — but none could reach both the psoas and iliacus, the two deep muscles actually causing his pain. So he spent 18 months engineering, prototyping, and testing until he built a tool that could replicate what a skilled physical therapist does with their hands.
That tool got him out of bed and back to the life pain had stolen. He knew he couldn't keep it to himself.
Core Nexus wasn't created to start a business. It was created because this tool needed to exist.
Read Bryan's full story →Feel the difference from your very first use. Here are the moments that matter most.
Undo 8+ hours of desk damage. Release the compression that builds up every workday.
Open your hips before training. Better range of motion means better lifts and fewer injuries.
Prevent the hip flexor tightness that ruins your next run. Recover faster, run longer.
Release tension so you actually sleep through the night without that dull hip ache.
Unlock hip power for sprints, cuts, and explosive movement. Used by pros and weekend warriors alike.
Compact enough for any carry-on. Don't let a long flight ruin your trip — release and recover anywhere.
