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Cervical Extension machine
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Cervical Extension machine

The MedX Medical Cervical Extension machine is designed to isolate and strengthen the muscle groups that support the cervical spine by utilizing a unique restraint system that stabilizes the neck and torso. The Cervical Extension machine supports Isometric Testing by utilizing an integrated load cell that is able to accurately measure isometric torque. In addition, the Cervical Extension machine supports Dynamic Exercise activities through the use of a specialized cam and weight stack that can accommodate up to 291 levels of resistance that can be adjusted in increments of three (3) inch-pounds from 30 to 900 inch-pounds. The Cervical Extension machine also includes a potentiometer that accurately measures the full Range of Motion (ROM) of the cervical spine from 0 degrees at maximum extension to 126 degrees at maximum flexion.

Cervical Extension Restraint System

The restraint system of the MedX Medical Cervical Extension machine is comprised of three (3) components, including:

  • Chest Restraint
  • Torso Restraint
  • Thigh Restraint/Lap Belt

The thigh restraint is a thick and heavy lap belt that is secured about the user’s thighs and is secured using the thigh restraint adjustment until the thigh muscles are completely restrained. This restraint prevents upward movement of the thighs and pelvis while the user is secured in the machine.

Isometric Testing

Isometric Testing is performed using the MedX Medical Cervical Extension machine at up to eight (8) positions through a 126-degree range of motion (ROM) in 18-degree increments, including 0, 18, 36, 54, 72, 90, 108, and 126 degrees. At each test point, the user is asked to exert force against the head rest of the machine, which is connected to the movement arm and load cell, for approximately 3 to 5 seconds. During this exertion, the MedX Rehab software visually displays the force exerted by the user on the display screen. At the conclusion of the exertion period, the force reading is automatically saved and the user is moved to the next test point. This process is repeated until the user has been evaluated at all test points within their range of motion (ROM). The resultant data is then utilized by clinicians to evaluate the strength of the muscle groups that support the user’s cervical spine.

Dynamic Exercise

In order to increase strength of the lumbar extensor muscles, Dynamic Exercise sessions are used to engage the user in exercise repetitions until the isolated muscle groups are exercised to exhaustion. In accordance with default MedX standards and protocols, users will exercise with a resistance weight that represents approximately 50% of their peak torque reading obtained from their most recent Isometric Test. The user will then perform between eight (8) and twelve (12) exercise reps starting from their maximum flexion position, extending through their maximum extension position, and returning back to their maximum flexion position in order to complete a single repetition. If the user is unable to complete at least 8 repetitions, then the exercise resistance is reduced. Conversely, if the user is able to complete more than 12 repetitions, then the exercise resistance is increased.

Exercise Frequency

Due to its unique ability to isolate and strengthen the muscle groups that support the Cervical Spine, the MedX Medical Cervical Extension machine requires no more than three (3) Dynamic Exercise sessions per week with a session duration of no more than 10 to 15 minutes including machine setup, configuring the machine for use, and restraining the user within the machine. In fact, numerous studies have shown that the Cervical Extension machine is able to increase strength in the muscle groups that support the cervical spine with only one (1) session per week.

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