BUILT Strength Infinite Series Back Extension (New)
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BUILT Strength Infinite Series Back Extension (New)
Description
The BUILT Strength Infinite Series Back Extension is a commercial-grade posterior chain machine built for serious training environments. A fixed 45-degree platform combined with a 200 lb selectorized stack lets athletes load far beyond bodyweight with a simple pin adjustment - no hunting for plates, no loading delays. Adjustable-height thigh pads and quilted leg rollers lock the lower body in place and set the hip pivot precisely, ensuring a clean, consistent hinge every single rep.
The D-clip attachment system opens the door to a range of handle styles, and a straight bar is included right out of the box. Whether you're programming it into a strength facility, a performance training center, or a dedicated home gym, the Infinite Series Back Extension delivers the durability and functionality that coaches and athletes rely on day in and day out.
Key Features
- 200 lb Selectorized Stack: Pin-select resistance loads the posterior chain well beyond bodyweight - ideal for progressive overload without swapping or loading plates.
- Fixed 45-Degree Platform: Purpose-built angle optimizes hip hinge mechanics and maximizes recruitment of the erector spinae, glutes, and hamstrings.
- Adjustable Thigh Pads: Height-adjustable thigh pads set the pivot point precisely at the hip for athletes of varying heights and proportions.
- Quilted Leg Rollers & Thigh Pads: Quilted padding and foam rollers keep the lower body locked in securely through every rep, even at heavier loads.
- D-Clip Attachment System: Accepts multiple handle styles for versatile loaded extensions; a straight bar is included and a bar catch at the base keeps it within reach between sets.
- No-Slip Textured Platforms: Flat and angled platforms feature textured surfaces for secure footing on high-traffic commercial floors.
- Fixed Entry/Exit Handlebars: Sturdy handlebars at the thigh pad position assist safe, controlled entry and exit - critical during heavy posterior chain work.
- 11-Gauge (3mm) Steel Frame: Heavy-duty frame construction built to withstand the demands of commercial use and heavy daily training volume.
- Primary Muscles Targeted: Erector spinae, gluteus maximus, and hamstrings - with secondary engagement of the multifidus and quadratus lumborum.
- 1 Year Parts & Labor Warranty + Lifetime Frame: Backed by a full parts and labor warranty with lifetime frame coverage, plus extended protection options available.
Shipping
Please email us at service@omahasportsandgames.com for a delivery ETA or to confirm shipping details.
What's Included
- BUILT Strength Infinite Series Back Extension machine
- Straight bar attachment
- Assembly manual
Why You'll Love It
The Infinite Series Back Extension is engineered for facilities that demand both performance and longevity - from commercial strength centers to dedicated training studios. The selectorized stack removes the friction of plate loading, keeping athletes moving efficiently through circuits and sessions. Quilted padding, precision-adjustable thigh pads, and a rock-solid 11-gauge steel frame reflect the kind of attention to detail that coaches and facility managers trust in equipment used daily.
With versatile attachment compatibility and a no-slip platform designed for high-traffic environments, this machine scales with your programming and your athletes. It ships brand new in a factory crate with an assembly manual, and professional inside delivery and assembly is available at checkout - so you can go from delivery to training day without the hassle. Backed by a 1-year parts and labor warranty with lifetime frame coverage, the Infinite Series is a long-term investment in posterior chain development that will pay off for years to come.
Product Specifications
View Product Specs
| Dimensions (L x W x H) | 48" x 39" x 62" (1219 x 991 x 1575 mm) |
|---|---|
| Weight Stack | 200 lb / 91 kg, selectorized |
| Resistance Type | Pin-select stack - incremental weight changes |
| Thigh Pads | Height adjustable, quilted pads and leg rollers |
| Attachments | D-clip; straight bar included; accepts multiple handle styles; bar catch at base |
| Frame Material | 11-Gauge (3mm) Steel |
| Platform Angle | Fixed 45 degrees |
| Warranty | 1 Year Parts & Labor + Lifetime Frame (extended coverage available) |
| Condition | New - ships in factory crate with assembly manual |
| Shipping Method | Crated freight; driveway delivery or inside delivery & assembly available |
| Assembly | Assembly required; professional installation available at checkout |
FAQ
How do I select weight on this selectorized back extension?
Simply insert the weight pin into the desired hole on the stack and ensure it clicks firmly into place before beginning your set. The pin-select system allows for quick, incremental weight changes between sets without any plate loading or unloading.
What handle attachments are compatible with the D-clip system?
The D-clip attachment point accepts multiple handle styles, giving you flexibility in how you load and perform extensions. A straight bar is included with the machine. Additional handles that fit standard D-clip connectors can be used to vary grip and stimulus.
Is professional assembly available, and how does shipping work?
Yes - professional inside delivery and assembly is available and can be selected at checkout. The machine ships crated on a freight pallet with an assembly manual included. Standard delivery brings the crate to your driveway or curb via liftgate; inside delivery brings the team into your space to assemble, test, and remove all packaging.
What maintenance does this machine require?
Inspect guide rods and stack alignment monthly to ensure smooth operation. Wipe down guide rods regularly and replace worn bushings annually. Keeping the stack and guide rods clean will extend the life of the machine and maintain consistent resistance feel over time.
What muscles does the back extension machine target?
The primary muscles targeted are the erector spinae, gluteus maximus, and hamstrings - the core of the posterior chain. Secondary muscles engaged include the multifidus and quadratus lumborum, making this an excellent machine for lower back health, athletic performance, and injury prevention programming.
What does the warranty cover on this machine?
As a new unit, the BUILT Strength Infinite Series Back Extension includes 1 year of parts and labor coverage plus a lifetime frame warranty. Extended protection plans covering up to 3 years of parts and labor are available for purchase at checkout. Warranty service is available nationwide.
Thank you for trusting us with your order! This product is shipped directly from the manufacturing warehouse to get to customers all over the U.S. as soon as possible!
While many of our products are prepared and shipped out within 48 hours, some of our items are built to order or require custom pieces that could take 2-6 weeks to prepare before shipping! Please contact us at 888-884-2234 for a delivery ETA if you have a strict timeline.
Thanks!
Omaha Sports & Games Team
Returns & Refunds Policy
Return Policy
We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.
To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase. To start a return, you can contact us at service@omahasportsandgames.com.
If your return request is accepted, it will be up to you as the buyer to return the item in its original packaging, unworn and unused. You as the buyer will be responsible for paying the return shipping. We may be able to assist you in scheduling a pickup for return but the payment will still be your responsibility. You can always contact us for any return question at service@omahasportsandgames.com.
All products are subject to a minimum 15% restocking fee based on the quality of the returned product and packaging.
Items opened, tested, used, or any other non-new condition may be eligible for return based on the manufacturer's return policy.
Shipping Damages and Issues
You must inspect your order upon reception and refuse delivery if you see damage. DO NOT sign for delivery if there is apparent damage to the product. If you sign for the delivery and later claim shipping damage, there is very little we can do to help.
If your order does not require signing at delivery and is instead just dropped off at doorstep with damage, contact us immediately with photos of the damaged boxes.
If your item(s) is defective, damaged or if you receive the wrong item, contact us immediately so that we can evaluate the issue and make it right.
Exceptions / non-returnable items
Certain types of items cannot be returned, such as custom products, special orders or personalized items. Please get in touch if you have questions or concerns about your specific item.
Unfortunately, we cannot accept returns on sale items, gift cards, or multiple product bundle discounts.