NexGen DynEx 2 Electronic Hand Dynamometer

Simlar to the NexGen DynEx 1, the DynEx 2 performs grip testing in the following modes. In addition, it can be used to perform grip therapy functions.

Max Grip Strength Test> mode provides up to ten consecutive measurements of maximum grip strength in a series, each of which may be stored into a non-volatile memory as an accepted measurement or over-written with a next measurement. Following each accepted measurement, a set of statistics related to the series of measurements is automatically computed and displayed, including Average Strength, Standard Deviation, and Coefficient of Variation.

Endurance Grip-Strength Test enables measuring maximum grip strength (MVC, Maximum Voluntary Contraction), then selecting a % MVC (Max) as a target force to be held by a patient to evaluate the time this load can be maintained. The Endurance Test also measures the maximum force that can be maintained by a patient after it is impossible for them to maintain the target force as time progresses. The DynEx stores time markers in seconds as the applied force drops each 10% increment below the target force. Force data is archived by time markers for review after the test.

Rapid Exchange Strength Test provides a means of comparing a Right/Left Hand exchange spaced by 0.8 seconds or 1.5 seconds to measure instantaneous handgrip strengths in both hands, sequentially over a series of 10 or 20 exchanges. Following conclusion of this test, each of the strength measurements may be individually reviewed along with the statistics related to the series of measurements. Statistics provided include Average Strength, Standard Deviation, and Coefficient of Variation of the measurement series.

Archived Test Data is stored for ease of review during each DynEx session. All grip strength measurements are automatically stored into a non-volatile memory to provide therapists and users the opportunity to conduct a series of tests, and then later review each of the test results. These data are stored until the DynEx is intentionally turned off or a 5-minute period has elapsed without use, at which time the device is automatically turned off to save battery life.

DynEx training requires much less energy than rhythmic training, does not generate large amounts of heat in the working muscles, and does not yield sweating. Compliance Scores are calculated during the therapy and are totaled during Rest Periods. Scores indicate the percent compliance with the prescribed Therapy thereby providing feedback to both the patient and the therapist on the quality of exercise accomplished. The DynEx provides two training regimens, called Fixed Therapy and Stepped Therapy.