The GripTrack Dynamometer
Contents
1. Statistics To scroll through and review all the statistics for the displayed test continue press ing REVIEW Press Next to view statistics for the next test In the following example the statistics for test 2 are displayed in the order they will appear by pressing REVIEW For the example on the next page the number of repetitions was set at two TEST g REVIEW TEST g REVIEW TEST g REVIEW REP RIGHT REP 2 RIGHT RIGHT 0J ur z OT LL 7 WO Maximum force Maximum force Average force right side repetition 1 right side repetition 2 for right side repetitions TEST g REVIEW TEST e REVIEW TEST g REVIEW RIGHT RIGHT REP LEFT To 1 _ mmm I FATIGUE md A uo LBS MAX CV for right side Fatigue for right side Maximum force Only displayed for timed left side repetition 1 tests 3 TEST g REVIEW TEST g REVIEW TEST g REVIEW REP 2 LEFT LEFT LEFT I am LBS LBS m am UJ W gt Maximum force Average force CV for left side left side repetition 2 for left side repetitions TEST 2 REVIEW TEST 2 REVIEW After all statistics have LEFT LEFT been selected the display gu gum y DEFICIT circles back to the begin e I7 eros _ To view the next test press NEXT The dis Fatigue for left side Bilateral deficit play inde2. 2 Plot the average force value for each position versus setting The plot Determine the number of tests performed and the number that had a CV less than or equal to 15 should resemble a bell curve with a peak at position 2 or 3 3 Compare maximum effort during REG test with maximum effort dur ing corresponding 5 position test REG values should be less Copyright 1997 JTech Medical Industries To reorder call JTech Customer Service I 800 985 8324 played on the console and on the Reporter printout is used to determine the consis tency of effort for all the same side repetitions at the specified handle position Several CV values greater than 15 may indicate inconsistency of effort The Rapid Exchange Grip REG Test Hildreth et al 1989 showed that the rapid exchange grip REG test could be used as another validity check to supplement the 5 position grip test In the event that the bell shaped curve generated by a maximally performing injured hand is some what flat or an uncooperative patient produces a mildly bell shaped curve the REG can serve as a distinguishing maximum voluntary effort test According to Hildreth a patient should be suspected of submaximal effort if the greatest force recorded during the REG exceeds the maximum force seen in the 5 position test at the same handle positiion The reason for this is theorized to be the short period of time the patient has to process the complex feedback of
3. also suggests that after two weeks of intensive care treatment the patient s grip strength should be re tested After 6 8 weeks of rehabilitation care the grip strength should again be tested Upon dis charge of the patient or release to pre injury status a final grip strength should be performed The 5 Position Grip Test The GripTrack Commander gives you the flexibility to perform a test at any or all of the 5 positions available with the dynamometer The two most common test methodologies are 1 a complete 5 position test to be used as a validity check or as part of a functional capacity evaluation and 2 a simple position 2 or position 3 maximum grip test as part of a routine musculoskeletal evaluation According to the American Society of Hand Therapists 1981 and Mathiowetz et al 1984 the proper positioning of the patient for this test is as follows Seated with the shoulder adducted and neutrally rotated elbow flexed at 90 fore arm in neutral position and the wrist between 0 and 30 extension and between 0 and 15 ulnar deviation In all cases the arm should not be supported The dynamometer is presented verti cally and in line with the forearm to maintain the standard forearm and wrist posi tions Commander Setup Before you begin a 5 position test setup the Commander console as follows 1 Clear any previous tests from the memory by holding the On Off button down for two seconds 2 Make sure REP r
4. signals sent to the central nervous system involving frequency of neuronal firing and number and types of motor units required The REG test is performed at the position in which the patient achieved maximum load during the 5 position test REG Test Setup The REG test can be performed following a 5 position grip test without having to erase or record the 5 position data However the Commander console setup must be changed to provide the correct number of repetitions Use the following instruc tions to set up the Commander console 1 Set the dynamometer grip handle to the position where the highest force value was recorded for the 5 position test 2 Enter Setup mode and set the number of repetitions to eight select TEST ALT and make sure TEST TIME is set at blank 3 Make sure the display is set for test 6 and is starting with the right side Patient Position and Instructions The proper positioning of the patient for this test is as follows Seated with both shoulders adducted and neutrally rotated elbows flexed at 90 forearms in neutral position and the wrists between 0 and 30 extension and between 0 and 15 ulnar deviation In all cases the arms should not be supported The dynamometer is presented verti cally and held by the examiner equidistant between the patient s hands at a height to maintain the standard forearm and wrist positions The examiner should hold the dynamometer by the pressure dyna
5. testing or delete the exam See the appropriate headings below Setup Mode Testing Defaults The Commander console enables you to use the Setup mode to control a variety of test parameters such as the testing threshold number of tests test time number of repetitions per test and force readings in pounds or newtons Once test parame ters are set they become the defaults for the console For example if you set the number of repetitions to three then the unit will test for three repetitions per side for every exam until you change the default Default settings do not change when the unit is turned off or when an exam is deleted Defaults can only be reset manu ally Setting Defaults Three buttons are used when setting console defaults SETUP SELECT and CHANGE The buttons function as follows SETUP Press this button until Setup is displayed at the top of the LCD It is also used to exit Setup after setting parameters SELECT Use this button to advance and select the parameter to be changed CHANGE This button changes the parameter setting TEST ALT Press this button until console is in Setup mode After parameters are set use this button to exit back to Test mode While in Setup mode use this button to advance through parameters When a parameter is displayed use this button to change the 2 CHANGE default setting Adjustable Defaults The GripTrack Commander console allows you to contr
6. C The GripTrack dynamometer plugs into the Grip port of the Tracker Interface Box without any modifications Tracker software automatically records test results analyzes sta tistics makes comparisons to previous tests during exams works seamlessly with other Tracker diagnostic devices and outputs data in a comprehensive report for mat For more information on upgrades contact your JTECH sales representative or call JTECH at 1 801 985 8324 or 801 478 0680 Wrist and Desktop Use of the Console The GripTrack Commander system comes equipped with two cords for connecting the dynamometer to the console unit The short cord is used when the Commander console is strapped to the examiner s forearm The longer cord is used when the Commander console is placed on a desktop or left in the case during testing The cords connect to the console and dynamometer with telephone jack plugs To remove a cord press down on the cord jack s plastic release lever and slide the end out of the receptacle When installing a cord make sure the jack snaps securely into place NOTE f a cord is damaged or lost do not attempt to replace with a standard tele phone cord as the wiring is not the same Contact JTECH Customer Service for the correct replacement cord Using the Commander Console Conventions This manual adopts the following conventions throughout Test Refers to one strength assessment that may include multiple repetitions and
7. Grip Track COMMANDER User s Manual Written by Tracy Livingston David Bernardi and Michael Carroll Published by JTECH Medical 470 Lawndale Drive Suite G Salt Lake City UT 84115 801 478 0680 www jtechmedical com JTECHwzbcaL Copyright 2004 JTECH Medical All rights reserved Part Nunber 685 Contents Commander Warranty 4 9 ed ede e eoe ERR aes 1 To have your Commander or GripTrack repaired 1 beatures and Benefits 2404 evo ewe x Sm dus 2 Check Your System caead x ace o e WR DEI do NA 3 Proper Care usd tos guest v RH DR NE CRUR B AP Vae RANA 3 Calibration ao220 sies tota s M esed bet Shit nies od dag MEE 3 Battery Life Lol Leeskirexikecdupbe veqge puexde Pa ade ed 3 Available Upgrades 22222 od cbr d aee 4 Wrist and Desktop Use of the Console usus 4 Using the Commander Console Convenllons crust vetu ge Dace ke wo RI La Ea d 5 Om OP BUttOD 3 2 oia doces wind OC Sis Rc Le M a reed 5 Sep Mode S decal wei dO sue Eau ERA Essais 6 Test and Test Alt Modes iiio Eum RIED as 7 Testing Methods 224 loko RR biwediwne DA EEORS E DG 8 Advanced Console Features llll elles 10 Reviewing and Exam vii dae e tee rh eee meet RR qa 10 Statistics Defmitohsc sieved th ESSERE EGIMUS eA 12 Deleting an EX ise vs oe xo EX aay SoMa OER 12 Printing Reports ea s s o et S aa A a a a ees 12 The GripTrack Dynamometer Care and Cleaning 22 229 erbSCE ULIS EP ached RUNI 13 Changing Handle P
8. IAL DAMAGES THE REMEDIES SET FORTH IN THIS WARRANTY SHALL BE THE ONLY REMEDIES AVAILABLE EXCEPT AS SPECIFICALLY PROVIDED BY STATE LAW NO PERSON HAS ANY AUTHORITY TO BIND JTECH TO ANY REPRESENTATION OR WARRANTY EXCEPT AS SPECIF ICALLY SET FORTH HEREIN To have your Commander or GripTrack repaired 1 Contact JTECH Customer Service and describe the problem After receiving a return authorization number return the product to JTECH including all acces sories postage paid and insured to JTECH JTECH is not responsible for damages or losses incurred in shipping 2 Submit proof of purchase and date 3 Include a brief explanation describing the problem Features and Benefits GripTrack Transducer Uses standard gauge for comparison to published norms Precision instrument with 97 force accuracy guarantee Upgradable to Tracker computerized testing system Commander Console Easy to read 1 5 high LCD display Operates during exams either as a wrist unit or as a desktop system using the included longer cable Gathers stores and analyzes up to 25 bilateral grip strength tests including up to eight repetitions per side Calculates CV fatigue maximum force and average force for each repetition Documents outcomes assessment with the automatic bilateral deficit analysis Helps determine consistency of effort in workers compensation and FCE exams Test now record later because the exam is stored in memory
9. Testing on page 14 In this example test 1 would corre spond with the GripTrack handle in RIGHT position 1 closest position NOTE When performing a rapid exchange grip test REG as a validity check fol lowing a 5 position test the REG becomes test 6 in the sequence See Rapid Exchange Grip Testing on page 16 for complete console settings Helpful Hint Since the display indexes past old tests stored in memory this method is recommended only if all previous tests have been erased Assigned Testing Method This method is used for single position grip tests and for REG tests Therefore Automatic Indexing should not used with this method Instead select test num bers on the Commander unit by pressing the NEXT button until the display s test number matches the grip gauge handle position In this example the test number on TEST J TEST the display corresponds to grip han REP f RIGHT dle position 3 the third position out from the handle Helpful Hint You should be careful to select the proper test number before starting a test and be extremely careful not to inadvertently continue with the next automat ic test in the series If you inadvertently begin a test at the next test number because of Automatic Indexing delete the test by pressing REVIEW and hold ing it while you press Redo Advanced Console Features OHO OOO Press REDO to test the last repetition again This feat
10. comparisons between the right and left side For instance testing grip strength at dynamometer position 2 with three repetitions for the right side and three repetitions for the left side is one test Exam Refers to multiple tests For example testing grip strength before therapy and after therapy could comprise one exam On Off Button Press the button once to turn on press again to turn off Exams stored in Mt memory are not erased when power is turned off Pressing this button and holding for two seconds deletes stored exams For information about deleting tests see Advanced Console Features on page 10 The console will shut off automatically after four minutes of inactivity Note Make sure no force is applied to the dynamometer when turning the console on When the console unit is turned on it will activate in either Test mode or Review mode depending on whether an exam is stored in memory If no exam is stored in memory the console will activate in Test mode ready for test 1 The active mode in this case TEST is displayed in this area Pes Ri repetition numbers are _ TEST shown here REP RIGHT Side being tested is displayed on this line 3 Real time force on dynamometer can be shown in pounds or new tons Testing Mode If an exam is in memory when the console is turned on Commander activates in Review mode From this point you can review exam data change to Test mode to finish
11. de as indicated by the coefficient of variation Testing Methods The Commander console can store up to 25 tests in memory complete with data for all repetitions and statistics In order to easily record multiple tests the Commander uses Automatic Indexing This method automatically indexes the display to the next test in the series without requiring you to press any buttons For example after completion of all right and left side repetitions of test 1 the display indexes to TEST 2 REP 1 RIGHT NOTE After completing a test Commander prevents inadvertent deletion of tests previously stored in memory by indexing to the next test not completed For example if test 2 was completed previously after test 1 is completed Commander will skip test 2 and index to test 3 Sequential Testing Method This method always begins with handle position 1 test 1 and uses Automatic Indexing to proceed from handle position 1 to handle position 2 etc Mark the results on the exam worksheet corresponding to the test numbers from the display When sequential testing and automatic indexing are used with a 5 position grip test test 1 indicates grip position 1 test 2 indicates grip position 2 etc In position 1 the adjustable grip handle is in the closest position to the gauge Using this method the entire 5 position test including three repetitions at each position can be quickly completed without touching the Commander console See 5 Position Grip
12. epetitions is set at three and TEST TIME is set to blank see page for setup information NOTE When using the Reporter printer setting the number of repetitions to five or more will cause the test to be incor rectly labeled as a rapid exchange test 3 Set the dynamometer to grip position 1 The Commander console will begin a test 1 for the right side and prompt for repetitions and new test positions 4 Select TEST or TEST ALT method TEST is the default which tests first the right then the left for each grip position TEST ALT alternates repeti tions between the right and left hand Patient Instructions Use the following standard instructions and verbal prompts developed by Mathiowetz and associates 1984 for performing the test 1 Tell the patient I want you to hold the handle like this and squeeze as hard as you can 2 Demonstrate position and procedure then give the dynamometer to the patient 3 After the patient is positioned appropriately say Are you ready Squeeze as hard as you can 4 As the patient begins to squeeze say Harder Harder Relax Repeat the test two more times then move on to the other hand Using the Worksheet for 5 Position Grip Tests The worksheet can be filled out after all the repetitions for all five handle positions are completed or following the REG test For more information about the REG test see below The worksheet provides space fo
13. even when Commander is turned off Automatic audio prompts examiner for the next test in the series and provides motivation during timed tests Measures up to 200 pounds for very strong performers Battery powered for portable operation Test protocols can be customized according to number of tests starting force newtons pounds test time and number of repetitions Check Your System Your GripTrack Commander system should include the following parts Commander Wrist Unit GripTrack Dynamometer Short Cord Long Cord Worksheets Make sure the serial number on the GripTrack matches the serial number on the Commander Console If these numbers do not match call JTECH Customer Service Proper Care With proper care your new GripTrack Commander will provide many years of worry free use Do not immerse the dynamometer or the console in water place in an autoclave or sterilize with harsh disinfectants Clean the housings with a soft non abrasive cloth moistened with clean water Clean the display using a non abra sive dry cloth Do not use cleaners Avoid dropping the unit or banging it against hard objects Do not stand on apply more than 200 Ib of force or use the dynamometer for anything other than grip strength testing Failure to follow these policies will void the warranty Calibration To ensure accuracy the GripTrack and Commander console have been factory cali brated with weights traceable to the National Institute of S
14. ition corresponds with the test number selected on the Commander Console
15. mometer and pres ent it to the patient as shown on the next page Starting the REG test with the right hand Use the following standard instructions for performing the test l Tell the patient Starting with your right hand grasp the dynamometer and squeeze as hard as you can Switch your hands as rapidly as possible and squeeze maximally with your left hand We will repeat this ten times Remember to exert maximal force and alternate you hands as quickly as possi ble Demonstrate and then give the dynamometer to the patient After the patient and dynamometer are positioned appropriately say Are you ready Begin As the patient begins to squeeze say Quickly Quickly A minimum of five repetitions is required for a validity determination The Commander console will prompt for eight but the test can be ended anytime after five Graph results on the worksheet General Grip Testing In order for a grip test to be used as a validity check a minimum of two repetitions must be performed bilaterally Additionally to obtain fatigue data the test must be timed see Setup Mode on page 7 Validity is based on the coefficient of variation CV of the completed repetitions for the hand and grip position Generally CVs greater than 1596 denote inconsistency of effort If a strength deficit greater than 15 exists bilaterally weakness is indicated For proper documentation purposes make sure that the grip pos
16. n There are many reasons to measure a patient s grip strength In worker s compen sation cases it may be necessary to establish if the patient can return to work Grip strength can also be used to determine the nature of injury organic versus psycho logical or the patient s sincerity of effort as in a functional capacity evaluation As part of a screening comparing a subject s strength relative to a normative database may be desirable As part of a post offer grip strength may be used to determine an employee s predisposition to repetitive motion disorders With insurance compa nies requiring documentation of improvement grip testing new patients to establish a baseline from which to assess treatment effectiveness surgical chiropractic or otherwise may also be helpful As part of a functional capacity evaluation the 5 position grip test is the minimum grip strength testing that should be performed The rapid exchange grip REG test and the sustained grip test should be performed if there is any question about sin cerity of effort resulting from the 5 position test A recently published rehabilitation protocol for patients with carpal tunnel syn drome suggests that grip strength testing should occur as part of an initial exam which also includes orthopedic and neurological tests nerve latency tests range of motion and X ray This test could be as simple as a position 2 maximum effort test or a complete 5 position test The article
17. ol the following default parameters THRESHOLD Determines the amount of force that must be exerted against the dynamometer before the console begins recording data This setting is used to avoid inadvertently beginning a test It can be set at 3 5 10 or 20 pounds TEST TIME Determines the length of a sustained test in seconds During the test the buzzer sounds The test ends when either the allotted time expires or the force drops below the threshold value Test Time can be set from 1 5 seconds or to blank for untimed tests TEST Controls the number of tests available for an exam The console automati cally goes into Review mode when the number is reached It can be set from 5 25 in increments of five REP Sets the number of repetitions per side per test It can be set from 1 8 Set Rep to a maximum of five for an REG test and to 4 or less for 5 position and gener al grip tests A minimum of two repetitions is required for CV calculations LBS N This parameter controls whether force readings are in pounds or new tons Test and Test Alt Modes Tests are conducted using either the Test or Test Alt modes How the modes are used is described below To conduct a test apply pressure on the dynamometer Test recording begins when the default threshold force is exceeded A test ends when test time expires or the force on the dynamometer drops back below the threshold The display then index es to the next repe
18. om GripTrack Commander data using optional Easy Docs Plus software from JTECH Medical For more information on Easy Docs Plus contact JTECH Medical sales at 800 985 8324 or 801 264 1001 The GripTrack Dynamometer Care and Cleaning GripTrack is an electronic device and therefore should not be submerged in liquid or placed in an autoclave The device should be cleaned with a soft non abrasive cloth dampened with clean water Do not use solvents detergents or harsh disin fectants on the GripTrack handle When not in use the device should be stored in the case provided Avoid dropping or banging the device against hard objects Never stand on pound with or apply more the 200 Ib of pressure against the dynamometer Changing Handle Positions The GripTrack dynamometer handle adjusts quickly and easily To change the han dle position At the logo end of the dynamometer flip the retaining clip off the slot ted piston arm and slip the handle out of the slots Place the vertical slot in the new position slot then rotate the horizontal handle slot into the corresponding position slot on the other piston arm and flip the retaining clip into position Important The grip handle can only be installed in the proper orientation Make sure the horizontal sideways handle slot is at the logo end of the dynamometer Always secure the handle with the retaining clip before using Using the GripTrack Dynamometer Grip Testing When Why How Ofte
19. osition 2o ey esas EAR Peewee eke 13 Using the GripTrack Dynamometer Grip Testing When Why How Often 13 The 5 Position Grip Test uou ex weed gece de EE 14 The Rapid Exchange Grip REG Test 16 General Grip Testing 24 i64 2 65406 Sees Re eee ess ede 453 18 Commander Warranty One year Limited Warranty The Commander console and GripTrack transducer are designed to perform reliably and to meet specifications In spite of diligence in manufacturing eliminating malfunctions resulting from random component failure is impossible Therefore JTECH will at its option repair or replace the product with a new or reconditioned unit at no charge for a period of one year from the date of purchase In view of the varied conditions in which the unit will be used the Commander Console and GripTrack are sold as is and JTECH s responsibility does not go beyond the terms set forth above JTECH will not be responsible for medical expenses or any direct indirect or conse quential damages arising from the use of this product JTECH shall in no way be liable loss of revenue or profits resulting or alleged to result from use of this product THIS WARRANTY IS MADE EXPRESSLY IN LIEU OF ANY OTHER WARRANTY EXPRESS OR IMPLIED INCLUDING AN IMPLIED WARRANTY OF MER CHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE UNDER NO CIR CUMSTANCES SHALL JTECH BE LIABLE FOR ANY DIRECT INDIRECT INCI DENTAL OR CONSEQUENT
20. r entering in all the data and sta tistics recorded by the Commander console The worksheet also provides a graph for plotting the averages from each side for each handle position Stokes 1983 and Janda et al 1987 reported that a patient giving maximum effort at all five settings should produce a bell shaped curve This applies to injured and uninjured popula tions alike It is based on the mechanical advantage unique to each test position Plotting the averages provides an indica tion of the patient s performance on the 5 position test If the data is indicative of the characteristic curve the patient can be said with reasonable certainty to have given valid effort and the test should be labeled as such The graph serves as a maximum volun tary effort check for the overall 5 position test and should not be confused with the validity check used for the individual test positions Coefficient of variation dis Commander Grip Strength Report Date Examiner Right Left REP3 FAT REP2 REP3 Average AVG Force Average AVG Force 12234 5 Grip Position Setting 122345 Grip Position Setting Rapid Exchange Test REG Consistency of Effort CV lt 15 of Q Maximum Voluntary Effort Bell shaped curve R Yes Bell shaped curve L Yes REG lt 5 pos max R Yes REG lt 5 pos max L Yes 0
21. tandards and Technology When turned on the Commander console automatically zero calibrates itself Therefore make sure no force is being applied to the dynamometer when the Commander console is turned on Any force applied to the dynamometer when the console is turned on will become the zero value and will result in inaccurate force readings Battery Life The Commander console uses a standard 9 volt alkaline battery The estimated bat tery life is 28 hours of operation The Commander console should always be turned off when not in use to maximize battery life The console will automatically shut itself off after four minutes of inactivity NiCad batteries can be used however the active battery life will be reduced to approximately eight hours or less When using a NiCad battery completely drain the battery before recharging to prevent memory in the battery that will further reduce battery life Available Upgrades The GripTrack M can be used with the following upgrade products Easy Docs Plus Create cutting edge reports using this versatile software package With Easy Docs Plus you can enter data from your GripTrack Commander and from other testing devices such as pinch dynamometers inclinometers goniometers and muscle testers Tracker Software Package GripTrack comes ready to plug into the leading Windows based musculoskeletal evaluation software package The package includes the Tracker Interface Box for connecting to a P
22. tition in the series After all repetitions for a test are completed the display indexes to the next sequential test number Continue testing with this method until all tests are recorded in memory Repetitions for a Test The Commander console can record and average up to eight strength repetitions per side for each test The repetition order is selected by either of two methods Same Side Repetition Order When Test mode is displayed the unit prompts for all right side repetitions first then all left side repetitions For example if the default is two repetitions the test sequence in Test mode is TEST 1 REP 1 RIGHT TEST 1 REP 2 RIGHT TEST 1 REP 1 LEFT TEST 1 REP 2 LEFT TEST 2 REP 1 RIGHT TEST 2 REP 2 RIGHT we etC Helpful Hint If unilateral testing is required the right side can be tested and the left side skipped by pressing the NEXT button or the right side can be skipped by pressing NEXT and testing the left side Alternating Sides Repetition Order When Test Alt mode is displayed the rep etitions alternate between right and left side as follows TEST 1 REP 1 RIGHT TEST 1 REP 1 LEFT TEST 1 REP2 RIGHT TEST 1 REP2 LEFT TEST 2 REP 1 RIGHT TEST 2 REP 1 LEFT etc This method can be used for rapid exchange testing see page 16 or if submaximal effort is indicated By mixing up the left and right side routine the subject may have a more difficult time repeating the results on each si
23. ure is helpful if the current test was started inadvertently was done incorrectly or was for prac tice Redo or delete other tests Press REVIEW then press NEXT until the correct test number is displayed While holding the REVIEW button down press Redo The entire test including all right and left side repeti tions will be deleted Then redo all repetitions for the deleted test Important Note When using REDO for a test the entire test including repetitions for the right and left side are deleted Once a test is deleted it cannot be recovered later Review last repetition To review the measured force for the last repeti tion press REVIEW after the repetition is complete To review other statistics associated with the test continue pressing REVIEW and the display will scroll through all available statistics To continue testing with the next repetition press TEST CONT To erase the repetition and start over press REDO Reviewing an Exam OOD An exam can be reviewed at any time either during testing or after by pressing the REVIEW button The last completed repetition will be dis played To review other tests within the exam press NEXT to advance to the next test with recorded data When advancing through tests the Commander display shows the test number with the right side repetition To see left side repetitions and additional statistics press REVIEW
24. xes only to test Only displayed for timed left side numbers with data tests Statistics Definitions LBS In Test and Test Alt modes LBS displays force against the dynamome ter in real time In Review mode LBS shows maximum force that was applied to the dynamometer for the displayed repetition AVG The average force of all repetitions for the indicated side CV The coefficient of variation for all the repetitions for the indicated side using the n 1 method Fatigue Calculated only for timed tests using the highest force repetition for the indicated side Fatigue shows the reduction in force at the end of a timed test compared to the maximum force reached during the same test For example if the maximum force reached is 100 Ib and the force at the end of the test is 80 Ib the fatigue is 2096 The fatigue formula is 100 80 x 100 Note If test ends before test time expires Fatigue will be 10096 Deficit Bilateral deficit indicating weakness of one side compared to the other Deleting an Exam To erase an exam turn the Commander console on then press and hold the on off button for a minimum of two seconds or until the unit reactivates The unit will beep and turn off indicating data has been erased Note All test default values will be retained Reports GripTrack Commander comes with a worksheet tablet that enables you to manually document test results In addition computerized reports can be created fr
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