Test Positioning

It is important to use bony landmarks and proper positioning when measuring range of motion so the reliability between one therapist taking measurements and numerous therapist taking the same measurements is reliable. If the goniometer isn’t placed properly on the structure you are measuring this could decrease the validity.  Following the landmarks and correct positioning allows for more accurate repeatable results. The test position for MMT is important in the fact that you do not want to measure the start or the end of the motion. You want to measure the mid-line of a motion because this is the most optimal muscle contraction where the actin and myosin filaments overlap to form the best contraction. MMT is measured either with gravity applied or gravity eliminated.  If an individual struggle lifting their desired limb because gravity makes it hard difficult it may be best to use gravity eliminated movements. Gravity eliminated movements are possible by keeping the moving structure parallel to the ground, the client is not the one that needs to be parallel to the ground just the structure moving. When measuring knee flexion and extension with gravity eliminated the client needs to lie on their sideline with the moving structure on top, not in contact with the mat. Scores of 5-3 normally involves movements against gravity. If the individual struggles with barely moving a limb they are either on a scale of 2-0. Any score less than 3 should use gravity eliminated so you can get a true idea of muscle strength without over exerting or harming the patient.