Neck Flex® Revolver™ Rotation Kit — at a glance
- What it is: a pulley-wheel attachment on a braided steel cable that clips to any Neck Flex® harness to add resistance through neck rotation and turning motions. Requires a Neck Flex harness.
- In the box: Revolver™ rotation attachment (polished steel swivel, braided steel cable), instructional videos.
- Trains: loaded neck rotation, plus flexion and extension through the same cable.
- Loading: resistance bands or a cable stack.
- Evidence: the Neck Flex is the head harness named in three peer-reviewed papers from a Royal Danish Air Force randomized controlled trial (BMC Musculoskeletal Disorders 2015 and 2017; Frontiers in Public Health 2020). In 2021 a federal court granted a preliminary injunction after finding a competitor's harness matched the Neck Flex "apparently even down to the stitching pattern." Full evidence profile · Neck Flex vs. Iron Neck.
- Made by: Gonza LLC, Leesburg, Virginia. Designed and engineered in the United States. Sold since 2012. Five U.S. patents.
The long-awaited Neck Flex® Revolver™ Rotation Attachment has finally arrived. Designed and constructed out of nothing but the highest quality and ultra durable materials, the Revolver™ Rotation Attachment is a true game changer. The design itself allows for seamless rotational movements while also allowing flexion and extension. The versatility of the Revolver™ Rotation Attachment is limitless and unmatched when used with your Neck Flex® harness.
Training uses
- Concussion Prevention: Optimizes dynamic neck stiffness and kinetic energy dissipation to absorb rotational acceleration forces in impact sports.
- Athletic Performance: Targets the sternocleidomastoid, splenius capitis, and upper trapezius muscles vital for combat sports, football, and racing.
- Bodybuilding & Aesthetics: Delivers structural muscular hypertrophy to improve neck thickness and overall upper-body symmetry.
- Rehabilitation & Physical Therapy: Facilitates controlled, non-compressive joint mobilization to treat whiplash and alleviate cervical spine dysfunction.
- Chiropractic Posture Correction: Corrects forward-head posture ("Tech Neck") by strengthening the deep cervical stabilizer muscles.
Technical Architecture & Design Specs
- Rotational Mechanism: Utilizes a heavy-duty, low-friction swivel bearing that provides smooth, unhindered 360-degree rotation under tension.
- Multi-Planar Versatility: Unlocks simultaneous multi-axis movements, letting users combine head rotation with linear extension and flexion.
- Compatibility Matrix: Engineered to integrate directly into the D-ring attachment points of the Neck Flex Harness System and standard cable gym machines or resistance bands.
- Premium Construction: Fabricated with high-grade polished steel hardware and industrial-strength, weather-resistant materials for lasting durability.
Comparative Market Value
- Cost Efficiency: Delivers the identical functional biomechanical movement patterns of full-scale rotational neck machines at a minor fraction of the price.
- Space & Portability: Eliminates the need for bulky halo-style rigs, fitting effortlessly into a gym bag for portable, travel-friendly use.
Comparing rotation training options? Read the full Neck Flex® vs. Iron Neck comparison — including how the Revolver™ approaches loaded rotation.
Named in peer-reviewed research
When researchers ran a 20-week randomized controlled trial on 69 Royal Danish Air Force helicopter pilots and crew, they had to name their equipment in the methods section so that other labs could reproduce the work. The harness they named was ours: "a head harness (The Original Neck Flex® Head Harness, Gonzo Companies, USA)."
That choice was made during study design — before any results existed, by researchers with no stake in selling harnesses, for a protocol that ran three times a week for five months without supervision. Fit across 69 heads, load stability, padding and stitch integrity at the load points all had to hold, or the data would not.
Murray, Lange, Søgaard & Sjøgaard, Frontiers in Public Health, 2020.
