Neck Flex® MMB Pro Series Kit — at a glance
- What it is: a plate-loaded and band-loaded neck training head harness, named for strongman Mike "The Machine" Bruce and built on the patented Neck Flex platform.
- In the box: MMB Pro harness, heavy-duty weight-lifting chain and carabiners, Bodylastics® 19 lb resistance band, Bodylastics® door anchor, Neck Flex tote bag, sticker, and instructional videos. Ready to train on day one.
- Trains: neck flexion, extension and lateral flexion through vertically oriented D-rings on each quadrant of the harness; add the Revolver™ attachment for loaded rotation. A front power strap keeps the harness out of your eyes under load.
- Loading: resistance bands from a door anchor, weight plates on the included chain, 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 MMB Pro was created in collaboration with Mr. Mike "The Machine" Bruce. We built upon the same patented Neck Flex platform to develop a harness that accommodates both plate loading and resistance band applications. The MMB Pro breaks the mold, a game changer. If you're serious about training, then step forward.
The Neck Flex® MMB Pro Series Kit is a heavy-duty, multi-patented head harness system engineered in collaboration with world-renowned neck strength expert Mr. Mike Bruce. Built on the advanced, medical-grade Neck Flex platform, it seamlessly integrates both progressive plate loading and resistance band training. This hybrid design delivers unmatched stability and safety, providing a comprehensive solution for complete cervical conditioning, elite athletic preparation, and injury prevention.
Biomechanical Advantages Over Competitors
- Correct D-Ring Orientation: Features specialized "dog-ear" and vertically aligned side anchor points. This allows for a anatomically correct line of pull during lateral (side) neck flexion, unlike the flat, horizontal D-rings on the Alpha harness which cause slippage and bad training angles.
- Integrated Front Power Strap: Equipped with a crucial front power strap to lock the harness down. This keeps the unit from shifting or riding up your face during intense forward flexion and extension drills.
- Superior Material Integration: Constructed using premium, thick diamond-embossed neoprene padding and polished, welded heavy-duty steel D-rings. This resists degradation far better than the thinner, non-embossed fabrics used on cheaper rigs.
Primary Training Targets & Use Cases
- Concussion Prevention & Impact Sports: Maximizes kinetic stiffness to buffer high-velocity rotational impacts in football, MMA, wrestling, and lacrosse.
- Advanced Hypertrophy & Bodybuilding: Promotes balanced muscular growth in the sternocleidomastoid, splenius capitis, and trapezius for a thicker, more powerful look.
- Chiropractic & Clinical Rehabilitation: Provides controlled, non-axial loading options for physical therapy, correcting forward-head posture ("Tech Neck"), and treating whiplash.
- Progressive: start with the included band and add plates on the chain or a cable stack as you get stronger.
Complete Pro Kit Inventory
- The Patented MMB Pro Head Harness with adjustable multi-point straps.
- Heavy-Duty Weight Lifting Chain & Carabiners for direct plate loading.
- Bodylastics® Patented 19 lb Resistance Band with snap-reduction safety tech.
- Bodylastics® Door Anchor and an industrial Neck Flex Tote Bag.
Comparing options? Read the full Neck Flex® vs. Iron Neck comparison — sourced, movement by movement.
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.
