This retrospective study summarizes the range of knee extension forces associated with the manual muscle test grade of 5. The range of the forces (>560 Newtons) was large and encompassing of more than 86% of measurable forces. These findings help to explain the insensitivity of manual muscle testing and why it has such a profound ceiling effect.
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References
1.
AitkenS.LordJ.BernauerE.FowlerW. M.LiebermanJ. S.BerckP. (1989) Relationship of manual muscle testing to objective strength measurements. Muscle & Nerve, 12, 173–177.
2.
AndersenH.JakobsenJ. (1997) A comparative study of isokinetic dynamometry and manual muscle testing of ankle dorsal and plantar flexors and knee extensors and flexors. European Neurology, 37, 239–242.
3.
BeasleyW. C. (1956) Influence of method on estimates of normal knee extension force among normal and post-polio children. Physical Therapy Review, 36, 21–42.
4.
BohannonR. W. (1992) Manual muscle testing of the limbs: Considerations, limitations and alternatives. Physical Therapy Practice, 2, 11–21.
5.
BohannonR. W. (1997) Reference values for extremity muscle strength obtained by hand-held dynamometry from adults aged 20 to 79 years. Archives of Physical Medicine and Rehabilitation, 78, 26–32.
6.
BohannonR. W. (1998) Alternatives for measuring knee extension strength of elderly at home. Clinical Rehabilitation, 12, 434–440.
7.
BohannonR. W. (in press) Manual muscle testing versus hand-held dynamometry for measuring knee extensor muscle strength. American Journal of Physical Medicine and Rehabilitation.
8.
BohannonR. W.CorriganD. (in press) Reliability and validity of measurements of knee extension strength obtained by hand-held dynamometry from community dwelling elderly women. Age & Ageing.
9.
SchwartzS.CohenM. E.HerbisonG. J.ShahA. (1992) Relationship between two measures of upper extremity strength: Manual muscle test compared to hand-held myometry. Archives of Physical Medicine and Rehabilitation, 73, 1063–1068.
10.
Van der PloegR. J. O.OosterhuisH. J. G. H.ReuvekampJ. (1984) Measuring muscle strength. Journal of Neurology, 231, 200–203.
