Atrophy of the quadriceps musculature is frequently associated with chronic knee instability. This atrophy may persist despite the patient's ability to return to athletic competition.
When open biopsies of the quadriceps muscle from unstable knees were compared with those from normal acutely injured knees, it was found that clinical evidence of atrophy correlated with a relative decrease in the size of Type II or fast twitch muscle fibers. This sup ports the subjective, clinical impression that the unsta ble knee is less effective in explosive push-off. The findings also indicate the necessity of including exercise specific for the training of Type II fast twitch fibers in any program designed to rehabilitate the injured knee.
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References
1.
Baugher WH, Warren RF, Joseph A.: Unpublished data
2.
Costill DL, Daniels J., Evans W., et al. Skeletal muscle enzymes and fiber composition in male and female track athletes. J Appl Physiol40: 149-154, 1976
3.
DePalma AF: Diseases of the Knee Philadelphia, J B Lippincott Company, 1954, pp 405-408
4.
Edgerton RV Mammalian muscle fiber types and their adaptability. Am Zool18: 113-125, 1978
5.
Edgerton VR, Smith, JL, Simpson DR: Muscle fibre type populations of human leg muscles Histochem J7. 259-266, 1975
6.
Edgerton RV, Barnard RJ, Peter JB, et al: Propertes of Immobilized hindlimb muscles of the Galago senegalensis . Exp Neurol46: 115-131, 1975 7 Edstrom L., Torlegard K. Area estimation of transversely sectioned muscle fibers. Z Wiss Mikr69. 166-178, 1969
7.
Edstrom L., Nystrom B.: Histochemical types and sizes of fibres in normal human muscles. Acta Neurol Scand45. 257-269, 1969
8.
Edstrom L. Selective atrophy of red muscle fibres in the quadnceps in long-standing knee-Joint dysfunction injunes to the anterior cruciate ligament. J Neurol Sci11: 551-558, 1970
9.
Gollnick PD, Sembrowich WL: Adaptations in human skeletal muscle as a result of training, In Amsterdam E, Wilmore J, DeMaria A (eds) Exercise in Cardiovascular Health and Disease. New York , Yorke Medical Books, 1977,p 74
10.
Gregor RJ, Edgerton VR, Perrine JJ, et al: Torque-velocity relationships and muscle fiber composition in elite female athletes. J Appl Physiol47: 388-392, 1978
11.
Haggmark T. , Enksson E.: Cylinder or mobile cast brace after knee ligament surgery. Am J Sports Med7. 48-56, 1979
12.
Johnson MA, Polgar J., Weightman D., et al Data on the distribution of fibre types In thirty-six human muscles An autopsy study J Neurol Sci18111-129, 1973
13.
Larsson L., Sjodin B., Karlsson J. Histochemical and biochemical changes In human skeletal muscle with age in sedentary males Acta Physiol Scand10331-39, 1969
14.
Nicholas JA, Stnzak AM, Veras G. A study of thigh muscle weakness in different pathological states of the lower extremity Am J Sports Med4: 241-248, 1976
15.
Padykula HA, Herman E.- The specificity of the histochemical method of adenosme triphosphatase J Histochem Cytochem3. 170-195, 1955
16.
Palmer I.: On the injuries to the ligaments of the knee joint Acta Chir Scand Supp/87-53,1938
17.
Smillie IS Injuries of the Knee Joint Edinburgh, Churchill Livingston, 1978, pp 1-3,235
18.
Tesch P., Karlsson J.: Isometric strength performance and muscle fiber type distribution in man Acta Physiol Scand103. 47-51, 1978
19.
Tesch P., Sjodin B., Karlsson J.: Relationship between lactate accumulation, LDH activity, LDH isoenzyme and fibre type distribution In human skeletal muscle Acta Physiol Scand103: 40-46, 1978
20.
Thorstensson A., Grimby G., Karlsson J.: Force-velocity relations and fiber composition in human knee extensor muscles J Appl Physiol40: 12-16, 1976
21.
Thorstensson A., Larsson L., Tesch P., et al Muscle strength and fiber composition in athletes and sedentary men Med Sci Sports9: 26-30, 1977
22.
Warren RD, Murray SM, Otis JC, et al Torque-velocity relationships of the knee extensor and flexor muscles in individuals sustaining injuries of the anterior cruciate ligament Presented at the Annual Meeting of the AOSSM , Williamsburg, VA, July 1983
