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The Sorinex J*Squat is a belt squat that attaches to Jammer Arms allowing the trainee to squat, march, deadlift, row, and do other movements otherwise not possible with Jammer Arms alone. After using them for over 6 months, Danny Tran of Infamous Strength gives his Sorinex J*Squat Review by saying, “if you already have a set of adjustable jammer arms and are extremely limited on space, this belt squat may be the best option for you.” However, it is a lever arm style of belt squat, so there are limiting factors inherent.
The J*Squat is not the first belt squat Sorinex has released. We’ve tested and reviewed their previous cable-based belt squat and always enjoyed it. The difference between it (along with most belt squats) and the J*Squat is that the J*Squat is designed to take up as little space as possible. Most of what Sorinex does is design equipment for the University Weight Room Setting, however, the same compact and versatile equipment performs well at a D-1 School, will typically work just as well in a home gym.
The Sorinex J*Squat was the first of it’s kind, a compact rack-mounted lever arm belt squat attachment. It utilizes the Sorinex Adjustable Jammer Arm System or equivalent (such as the Rogue LT-1 .50 Cal Trolley System) and converts into a belt squat, making it one of the most compact belt squats on the market.
The J*Squat is very unique. It’s also very functional.
Although there are negatives to the design (mainly that it’s a lever and therefore will encourage/force forward knee travel,) there is also a huge benefit. It’s extremely compact, easy to set up, and easy to use.
The J*Squat belt squat attachment does exactly what one would want out of a belt squat. Emphasizing load on the quads without putting much strain on your back. This is extremely effective when you want additional volume to your workouts without taxing your back or if you are nursing an injury.
The attachment is extremely versatile. While it is designed to be a belt squat, there are many movements that can be done using the J*Squat attachment. Rows, Deadlifts, and lunges are some of the many movements you can also do with it.
Another great feature with the J*Squat is that no extra platform is needed. You can use it directly off of your floor while mounted to your power rack.
The belt squat attachment is also very compact and stows away easily into any corner of the gym, and sorinex also sells a hook that you can attach to your rack to store the attachment out of the way when not in use. This feature is extremely vital for home gym owners since real estate is not usually in abundance. The fact that it is so compact makes it ideal for optimizing the most training options per sq. ft.
While the design allows it to be compact, it does come with some inherent flaws. Since it is a lever arm style belt squat, the felt load is only about 60% of the loaded weight according to Sorinex’s website, which could present a problem when using thicker plates. This is not so much of an issue to me since I use the belt squat as a quad movement accessory, meaning I don’t really load up on the weight, but rather I focus on volume and the actual movement.
This product also comes with a prerequisite in the fact that you need to own an Adjustable Jammer Arm or equivalent system in order for you to use it. Without such a system, the attachment is useless. When comparing prices, if you do not already own the adjustable jammer arms, purchasing this with the jammer arms is a fairly high cost.
The last thing is, while the J*Squat is rather compact, it is a little awkward to store and mount if you are alone since the kickstand freely swings about.
While my experience (Danny Tran's) with other belt squats is rather limited, I have tried the Rogue Rhino Belt Squat, and the SquatmaxMD Belt Squat. Personally, when compared to these other two belt squats, the Sorinex surely does not stand a chance.
The Rogue Rhino offers much more versatility, and a much better felt load than the J*Squat. The J*Squat does beat the rhino in terms of footprint and utilizes a much smaller space that that of the Rhino.
The SquatmaxMD is probably the best belt squat available in my opinion, It’s movement pattern is far superior than that of any other belt squat I have used however it does have some flaws too. It’s a little bulky to be considered a stow-away piece of equipment and therefore needs to be mounted permanently and in some situations, not everyone has the space for that.
I would only recommend the J*Squat if you meet these two following requirements:
If you do not meet these requirements, I can’t say that I can wholeheartedly recommend the belt squat. While it is a great compact and versatile device, it just simply isn’t the best one when it comes to felt loading and movement pattern.
Now if you do meet these requirements, then it may be a good option for you. Personally, It was the only option I had since I already had the adjustable jammer arms, and there is no room in my gym for a SquatMaxMD or Rogue Rhino.
My name is Danny Tran, and I have been a home gym owner for about five years. I have a passion for collecting, using and studying strength equipment. In 2019, I turned my garage gym into a business. Infamous Strength, a private strength training gym and powerlifting lifestyle brand.
Personal Instagram: @DannyTran_INFMS
Business Instagram: @InfamousStrength
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