Simply put, it is the most sophisticated way to workout.  Adaptive resistance means you aren’t working with one set of “weight’ during a working set. Our bodies are built to be stronger at certain points of the motion than others. We are adaptive beings in many senses of the word. Yet, if you want to achieve this with weights, the closest you could come to having adaptive resistance would be using a magical pair dumbbells that’s changing its weight through each rep and set (doesn’t exist).

When you pick up a weight, you are selecting one weight to be used throughout the working set. If you were to select your max weight, you would have to choose a weight for the weakest part of your concentric movement or what people refer to as “positive, which is the first part of the lift”. You hear lifters refer to this as the “sticking point”. From there, we select a weight much lighter so we can get a certain amount of volume or reps in a working set. You will see people using a variation of reps depending on the amount of weight being used (ex: 4-6-8-10 reps). We are stronger at different lengths in the lift and much stronger in the eccentric (negative) side of the lift, which is the second part of the lift or exercise. The way people have combated this over the years is to slow down the motion by “feeling out” the negative or by working specifically on negatives with a spotter (someone helping you get the lift back to the start of the rep). Our workouts are restricted by these limitations. These challenges have forced fitness enthusiasts to increase their volume (time in an exercise) to get the impact to the muscle. And while volume is important, it’s just as important to create greater force to the muscle or mechanical tension to “force” the muscle to change.
Adaptive resistance is not using a metric of weight but rather force (foot) pounds. This innovation allows us to get more bang for the buck in a much shorter time frame, giving us a more impactful stimulus (workout) and allowing us to get back into a state of recovery without over-working the muscle. Hence, the very reason why we can shorten our workouts and get even better results. Imagine getting the absolute greatest impact to the muscle every time, and with the capability of achieving strength, hypertrophy, and conditioning all in one working set (impossible with weights…see the video below). Not only does this impact the muscle itself but it also has a great affect on our metabolism, hormones, nervous system, and cardio vascular systems. It is the most result-based form of resistance training available today.

ARX is a resistance exercise technology that uses computer-controlled, motorized resistance in place of weights or other more traditional forms of resistance. “Adaptive resistance” includes safe, controlled, and quantifiable resistance to provide the perfect, personalized workout for maximum results.