Trusted By 200,000 Athletes Worldwide


Trusted By 200,000 Athletes Worldwide

X4 Baseball Training Blog

May 4, 2022

People all across the world have been asking me to write a blog on the VPX Training Harness, so here it popular demand.

With so many training aids, systems, and methods out there, who is to know what is the right one for you? Let me help you out - you probably will spend a lifetime trying to figure it out. And by the time you do figure it out, they will be putting flowers on your baseball or softball grave.

Bottom line is this - if it works for you, keep using it. I always look at functional performance and whether it makes common sense....although it appears "common sense" is the unicorn these days.

Another thing you should consider is actual results and whether it has longevity in the game. Meaning, is it a trend or fad? Or does it have sticking power.

So, to introduce you to something that has sticking power, is used by 20+ MLB teams and over 100 NCAA programs nationwide, the VPX Training Harness checks all the boxes.

In fact, over 200,000 use the harness worldwide and some of the biggest sports stars are satisfied customers.

The VPX Training Harness is for hitters and pitchers - softball and baseball. It is the 1st movement enhancement training system that actually allows you to feel the wrong movements and make the adjustments accordingly. Through negative and positive feedback, the VPX Training harness gives you the muscular response required to make the adaptations towards maximum performance.

If you want to learn more, just google it or search for it on social media. You will see countless reviews, videos, and testimonies that profess its worth. If you cannot find info on it, your internet is not working....guaranteed!


There are a few things to decide upon before you purchase your VPX Harness, which comes with a waist belt, foot strap, and 2 specialized resistance bungees. Are you willing to actually use it? No magic pill, as you have to actually use it for about 15-20min three times a week.

There are hundreds of testimonials that show instant results within the first time of using, wherein athletes are gaining 4-6MPH of velocity and power increases. These are pretty common. 

Either way, once you decide the VPX Training Harness is a good choice, then there are a few things you need to do.

STEP 1: Measure your waist size and add 1" — 2" to your pant waist size. This will compensate for clothing bulk, as your VPX Harness belt is worn over your clothing. All waist belt sizing options are listed in the VPX Harness drop down sizing menu (when you purchase). The VPX Harness does NOT fit waist sizes below 24".

STEP 2: Measure your height WITH SHOES ON to determine what specialized resistance bungee length you will require. Length options include shorter than 6'1" and taller than 6'1".


Once you receive your unit, ensure it is not damaged and all pieces are included. If you have any issue, email customer service at Do NOT use your VPX Training Harness if it arrives damaged or has missing parts — or VeloPRO Baseball will not provide a refund.


Your VPX Training Harness waist belt is designed to be worn above the top of your hip bones. Securely place the waist belt over your belly button and ensure the BOTTOM of the waist belt sits ON TOP of your hip bones. Suck your stomach in and then secure the waist belt. This ensures a proper fit. The harness resistance is designed to leverage against your hip bones, which minimizing any “sagging” of the VPX Training Harness (due to downwards resistance caused by the ba


When you first start using your VPX Training Harness, you will feel a large amount of resistance from the specialized bungees.

STEP 1: Ensure you have ordered the proper resistance bungee size, as there are two sizes (shorter than 6'1" and taller than 6'1").

STEP 2: The resistance level is designed to be intense, but not to the point you cannot utilize your VPX Training Harness during normal hitting or pitching training. If your knee keeps “buckling” under the resistance, attach only one resistance band to start your process. However, it MUST be the band that contours your back hip and leg. At some point, you will need to utilize both resistance bands during training to reap the benefits of movement enhancement.

STEP 3: The specialized resistance bands are designed to increase ground reaction force (GRF). This may take time for some athletes, as this is a strength training issue that requires repetition and consistent usage of the VPX Training Harness. With more usage, you will be able to utilize both bands and/or increase endurance during training sessions. Know that the VPX Training Harness is BOTH a movement enhancer and a sport specific strength tool.


Your VPX Training Harness is a specialized training tool. It must be used consistently and with repetition. Refer to all the VPX Baseball or Softball pitching and hitting programs to maximize your development process. Programming is located under the ‘Training Room’ tab.


The VPX Training Harness provides instant feedback with every rep. If you are movement EFFICIENT, your will feel the specialized resistance bands pulling your back foot off the ground before you throw the pitch or hit the ball. This is a NEGATIVE sensory overload designed to give your brain feedback into what is going right or wrong. If you are wearing your VPX Training Harness on your front foot, it will try to “buckle” your front knee during rotation.

Resist and work against what the resistance harness is trying to do to your lower half. If you attain movement efficiency, you will neutralize bungee resistance throughout your pitching delivery or swing.


The velocity is in your arm. The power is in your swing. But oftentimes, due to movement and mechanical deficiencies, energy escapes prematurely or is redirected towards deceleration properties. These are two energy laws that cannot be refuted and/or occur subconsciously.

You can see this occuring when pitchers sit 79–82MPH, but flash 86MPH occassionally. This is due to movement efficiency occurring on only a few pitches. The VPX Training Harness is designed to get your pitching delivery to be efficient and maximize energy usage. Therefore, you will unlock energy’s power and use all of it properly.

For hitters, the same principles can be applied — as described above.

The sites you can go to are and then click your specific sport. There are drills, tutorials, and explanation videos on there to reference.

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