3700 Sagamore Parkway North . PO Box 5729 . Lafayette, IN 47903 USA . Ph: 765-423-1505 Fax: 765-423-4111 . www.lafayetteinstrument.com . E-mail:[email protected]
The Lafayette Manual Muscle Test System (MMT)
3700 Sagamore Parkway North . PO Box 5729 . Lafayette, IN 47903 USA . Ph: 765-423-1505 Fax: 765-423-4111 . www.lafayetteinstrument.com . E-mail:[email protected]
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Part:
Part Number:
Replacement Parts List:
01163CS
01163LFS
01163SFS
1-003-0035
1-003-0036
4-221-275
1-003-0037
3-281-017
3-323-175
6-240-001
MAN078
3-422-135
4-212-136
Curved Stirrup
Large flat stirrup
Small flat stirrup
Battery Door
MMT Strap
Strap rod
Front Label
3V Lithium Battery
Battery Holder
MMT Case
MMT Manual
Button caps
Battery Door Screw
Appendix A - Torque Measurements with the MMT
In some research and rehabilitation applications, it is necessary to obtain torque measurements
for the limb being tested. Torque is often a more accurate indicator of total strength because
it takes into account the length of the muscle being tested. The Lafayette Manual Muscle Test
System (MMT) can be used to obtain torque values through a series of basic calculations.
Torque is measured in units of Newton meters (Nwm) in the Metric system and in foot pounds
(ftwlbs.) in the English system. Torque is the product of the force applied times the distance
between the force and the pivot point (usually a joint).
Equations for obtaining torque readings with the MMT using metric values:
Torque = Force x distance
Where force equals the MMT reading converted to Newtons and distance is the length between
where the force is applied and the joint being tested in meters.
Newtons conversions:
1 pound = 4.45 Newtons
1 kilogram = 9.81 Newtons
Normative Strength can also be quantified as torque per kilogram bodyweight (Nwm/kg). This
value is obtained by dividing the torque by the person’s bodyweight in kg.
Strength
= ((MMT reading in Newtons) x (distance))
bodyweight in kilograms
