Train Smarter. Swim Faster. Perfect Every Stroke.
Engineered for programs & athletes that demand daily durability and precision performance.





I’m sincerely thrilled my relationship with GMX7 is now official after training with their product over the past few years. I always look to form partnerships with businesses and organizations that I believe in—who support me. GMX7 joins a list of sponsors that do just that.
The X1-PRO is the best resistance training tool I have ever encountered throughout my swimming career. This device is a game-changer for all types of swimmers. If you don’t have one you are falling behind!
As a sprinter, resistance training is a huge part of my day-to-day routine, and the X1-PRO allows me to push myself to new limits that you just can’t reach on other resistance tools. Using the X1-PRO has really taken my training to the next level.
From the beginning I had the pleasure of watching and testing the new X1-PRO through its entire inception and design. GMX7 and David McCagg have definitely developed a new product that will revolutionize resistance training for everyone. Age group through international level competitors will benefit greatly from this new invention. We have been using it with our swimmers for some time now and with it being fully available it will become the center piece for our resistance training.
GMX7 X2-Pro Benefits

Perfect Technique, Every Rep
Smooth, bi-directional resistance reveals stroke flaws instantly so athletes can correct mid-set.

Durable for Daily Grind
Built for year-round programs that train hard, often, and expect nothing less than pro-grade equipment.

Race-Relevant Power
Develop balanced strength and speed through resistance that mimics true in-water force.
Proof of Performance
- Team-Grade Durability: Designed for daily program use—season after season.
- Bi-Directional Load: Resistance both directions for balanced development.
- Instant Adjustability: Switch resistance levels on deck without pool reconfiguration.
- Compact & Portable: Easy to install, easy to move—no construction required.
- Built by Champions: Engineered with input from world-class swimmers and coaches.


Let customers speak for us
from 20 reviewsI’m sincerely thrilled my relationship with GMX7 is now official after training with their product over the past few years. I always look to form partnerships with businesses and organizations that I believe in—who support me. GMX7 joins a list of sponsors that do just that.

The X1-PRO is the best resistance training tool I have ever encountered throughout my swimming career. This device is a game-changer for all types of swimmers. If you don’t have one you are falling behind!

As a sprinter, resistance training is a huge part of my day-to-day routine, and the X1-PRO allows me to push myself to new limits that you just can’t reach on other resistance tools. Using the X1-PRO has really taken my training to the next level.

From the beginning I had the pleasure of watching and testing the new X1-PRO through its entire inception and design. GMX7 and David McCagg have definitely developed a new product that will revolutionize resistance training for everyone. Age group through international level competitors will benefit greatly from this new invention. We have been using it with our swimmers for some time now and with it being fully available it will become the center piece for our resistance training.

GMX7 is changing the landscape of resistance training forever. The X2-PRO is a GAME CHANGER and our pro’s trust in the results they’ll achieve with the X2-PRO.

GMX7 and David McCagg have created something very special. The features are insane and every athlete needs to be resistance training on it!

The X2 PRO has been an invaluable tool in many ways for our Team Elite Professional and Age group swimmers at StingRay aquatics. The smooth consistent resistance can be dialed up for challenging short blast efforts or can be dialed down to add a small load. In addition, our swimmers are constantly using the device to work on stoke corrections. I have my X2-PRO’s in the water daily and it has been a tremendous addition to our program

This is an awesome product and training tool. We don’t have much room and no storage at most of our facilities. Having the ability to train resistance daily and literally pull the equipment out of my backpack is fantastic! I highly recommend this product.

X2-PRO has been an Excellent tool in developing our underwater kicks as well as using to ”set” the catch in our strokes, different than tubing or racks, the leash does not inhibit the range of kicks. We love it.

As a coach, one thing I am always looking for is feedback and communication with athletes. The Pro’s have stimulated conversations about post-action potential. In the right minds, the X2-PRO’s are far more than just resistance training. We are discovering possibilities daily.

GMX7 is an amazing product, I would highly recommend it.

The Richmond women immediately commented on the deceptively smooth resistance. The coaches are excited, as these compact devices do not clutter our small pool deck. Further, the X1-PRO appears to have limitless applications and we’re inspired to re-imagine our training at Richmond.


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