Some of these products and exercises do strengthen your core in physical therapy in Voorhees; however, they are doing much more harm than they are worth. Besides being dangerous to your personal trainer in body solutions, they are also inefficient. I will use a sit-up for an example. During this exercise there is only a small window of movement where you are actually using your core safely. This window is only a few inches. The rest of the arc of a sit-up is spinal compression and momentum.

Even though these products and machines are all different they are in essence the same thing. They all involve different variations of crunches, sit-ups or leg raises. Crunches, leg raises, and sit-ups lead to bad posture, neck and shoulder problems and back degeneration. Let’s analyze a crunch for instance: a crunch usually involves crisscrossing your hands behind your head and crunching up roughly half way to your knees. During the “raising” phase of this movement the neck is being pulled forward by the hands on the head. The shoulders are rounded forward and the spine is flexed forward. This all occurs under a tremendous amount of force, over 400 lbs. of force to be exact. The result is a poor movement with virtually no benefit. View More

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