User's Manual

189
The “Hand Grip – Rapid Exchange” test is performed with a JAMAR handgrip dynamometer. This device
is utilized to measure handgrip strength in both the right and left hands.
The “Hand Grip – Rapid Exchange” test is performed by having the client rapidly squeeze the grip
dynamometer and move it to the other hand for a series of six trials each for both right and left hands.
The adjustable handle component of the grip dynamometer is to be set up in spacing position two. The
average maximum force for all six trials is compared to the values obtained for the standard or MMVE
handgrip strength test for validity purposes.
Prepare the grip dynamometer position as indicated on the screen. If the client has completed the
Modified Maximum Validity Effort test, the adjustable handle spacing will be in position 2 (1-1/2 inches), or
the second position away from the fixed handle. If the Maximum Validity Effort test was completed the
position will be based on the position where the client registered the strongest readings. The device must
be presented to the client with the cord attachment on top in order to conform to the metacarpal arch of
the hand.
The client should optimally be positioned sitting as follows:
Both feet flat on the floor
Upper arm next to body
Elbow flexed at 90 degrees
Forearm neutral (thumb up)
Hand & forearm in slight shoulder internal rotation (toward the center front of the torso)
Forearm should not be resting on any surface while gripping
Click Start Test at the top of the page.
Voice prompts will guide the tester and the client through the test. Observe the client closely to ensure
he/she understands.
Instruct the client to begin gripping the device quickly and with maximum force for a one-second trial
duration beginning with the right hand. The client must follow the voice prompts to “Switch to Left,” and
“Switch to Right” to complete 6 consecutive trials each of both right and left hands.