Effect of Body Position on Knee Flexor Peak and Average Torques
We evaluated the effect of body position (seated, supine and prone) on knee flexor muscle strength. Ten healthy women (mean age; 21yr) performed isokinetic knee movement on a KIN/COMTR dynamometer. The parameters recorded were peak torques (PT) and average torques (AT) during concentric (CON) and ec...
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| Published in | Rihabiritēshon igaku Vol. 33; no. 4; pp. 237 - 241 |
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| Main Authors | , , |
| Format | Journal Article |
| Language | English |
| Published |
The Japanese Association of Rehabilitation Medicine
1996
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| Subjects | |
| Online Access | Get full text |
| ISSN | 0034-351X 1880-778X |
| DOI | 10.2490/jjrm1963.33.237 |
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| Abstract | We evaluated the effect of body position (seated, supine and prone) on knee flexor muscle strength. Ten healthy women (mean age; 21yr) performed isokinetic knee movement on a KIN/COMTR dynamometer. The parameters recorded were peak torques (PT) and average torques (AT) during concentric (CON) and eccentric (ECC) contraction at 60°/sec on each position. ECC torques were significantly greater than CON torques. CON AT and ECC AT on seated position were significantly larger than on prone and supine. Seated CON and ECC PT were also the largest. ECC/CON ratios were not significantly different among the three positions, indicating that body position had similar effects on CON and ECC torque production. Knee flexor torques on seated and prone were measured in one subject once a week for 8 weeks. Coefficients of variation of 8 measurements on both positions were comparable. In conclusion, seated position is a position that produces the highest torques with acceptable reliability, and because of ease of positioning, is recommended for routine clinical use. |
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| AbstractList | We evaluated the effect of body position (seated, supine and prone) on knee flexor muscle strength. Ten healthy women (mean age; 21yr) performed isokinetic knee movement on a KIN/COMTR dynamometer. The parameters recorded were peak torques (PT) and average torques (AT) during concentric (CON) and eccentric (ECC) contraction at 60°/sec on each position. ECC torques were significantly greater than CON torques. CON AT and ECC AT on seated position were significantly larger than on prone and supine. Seated CON and ECC PT were also the largest. ECC/CON ratios were not significantly different among the three positions, indicating that body position had similar effects on CON and ECC torque production. Knee flexor torques on seated and prone were measured in one subject once a week for 8 weeks. Coefficients of variation of 8 measurements on both positions were comparable. In conclusion, seated position is a position that produces the highest torques with acceptable reliability, and because of ease of positioning, is recommended for routine clinical use. |
| Author | CHINO, Naoichi ARITA, Motohide LIU, Meigen |
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| References | 8) Houtz SJ, Lebow MJ, Beyer FR: Effect of posture on strength of the knee flexor and extensor muscles. J Appl Physiol 11: 475-480, 1957. 10) Bobath B: Abnormal Postural Reflex Activity Caused by Brain Lesion. Wood and Westworth Co, Great Britain, 1972, pp. 20-56. 5) Holmes J, Alderick G: Isokinetic strength characteristics of the quadriceps femoris and hamstring muscles in high school students. Phys Ther 61: 190-195, 1981. 6) Morris A, Lussier L, Bell G, Dolley J: Hamstring/quadriceps strength ratios in collegiate middle-distance and distance runners. Phys Sports Med 11: 17-77, 1983. 2) Gerdle B: The relationship between peak torque and work of the quadriceps and hamstrings after knee injury. J Sports Med Phys Fitness 31: 185-189, 1991. 14) Christopher JS: Reliability of knee flexor peak torque measurements from a standardized test protocol on a kin/com dynamometer. Arch Phys Med Rehabil 73: 15-21, 1992. 13) Stanton G, Purdam C: Hamstring injuries in sprinting; the role of eccentric exercise. J Orthop Sports Phys Ther 10 (9): 343-349, 1989. 7) Barr A, Duncan P: Influence of position on knee flexor peak torque. J Orthop Sports Phys Ther 9: 279-283, 1988. 12) Hellebrandt FA, Houtz SJ, Partridge MJ, Walters CE: Tonic neck reflexes in exercises of stress in man. Am J Phys Med 35: 144-159, 1956. 11) Tokizane T, Murao M, Ogata T, Kondo T, et al: Electromyographic studies on tonic neck, lumbar, and labyrinthine reflexes in normal persons. Japan J Physiol 2: 130-145, 1951. 3) Worrell TW: Factors associated with hamstring injuries. An approach to treatment and preventative measures. Sports Med 17: 338-345, 1994. 1) 里宇明元:小児リハビリテーションの最近の動向-小児における筋力の評価-. リハ医学 30:571-583, 1993. 4) Costain R, William A: Isokinetic quadriceps and hamstring torque level of adolescent female soccer players. J Orthop Sports Phys Ther 5: 196-200, 1984. 9) Worrell TW, Deneger CR: Effect of body position on hamstring muscle group average torque. J Orthop Sports Phys Ther 11: 449-452, 1990. |
| References_xml | – reference: 4) Costain R, William A: Isokinetic quadriceps and hamstring torque level of adolescent female soccer players. J Orthop Sports Phys Ther 5: 196-200, 1984. – reference: 13) Stanton G, Purdam C: Hamstring injuries in sprinting; the role of eccentric exercise. J Orthop Sports Phys Ther 10 (9): 343-349, 1989. – reference: 3) Worrell TW: Factors associated with hamstring injuries. An approach to treatment and preventative measures. Sports Med 17: 338-345, 1994. – reference: 10) Bobath B: Abnormal Postural Reflex Activity Caused by Brain Lesion. Wood and Westworth Co, Great Britain, 1972, pp. 20-56. – reference: 9) Worrell TW, Deneger CR: Effect of body position on hamstring muscle group average torque. J Orthop Sports Phys Ther 11: 449-452, 1990. – reference: 11) Tokizane T, Murao M, Ogata T, Kondo T, et al: Electromyographic studies on tonic neck, lumbar, and labyrinthine reflexes in normal persons. Japan J Physiol 2: 130-145, 1951. – reference: 5) Holmes J, Alderick G: Isokinetic strength characteristics of the quadriceps femoris and hamstring muscles in high school students. Phys Ther 61: 190-195, 1981. – reference: 1) 里宇明元:小児リハビリテーションの最近の動向-小児における筋力の評価-. リハ医学 30:571-583, 1993. – reference: 8) Houtz SJ, Lebow MJ, Beyer FR: Effect of posture on strength of the knee flexor and extensor muscles. J Appl Physiol 11: 475-480, 1957. – reference: 7) Barr A, Duncan P: Influence of position on knee flexor peak torque. J Orthop Sports Phys Ther 9: 279-283, 1988. – reference: 12) Hellebrandt FA, Houtz SJ, Partridge MJ, Walters CE: Tonic neck reflexes in exercises of stress in man. Am J Phys Med 35: 144-159, 1956. – reference: 2) Gerdle B: The relationship between peak torque and work of the quadriceps and hamstrings after knee injury. J Sports Med Phys Fitness 31: 185-189, 1991. – reference: 6) Morris A, Lussier L, Bell G, Dolley J: Hamstring/quadriceps strength ratios in collegiate middle-distance and distance runners. Phys Sports Med 11: 17-77, 1983. – reference: 14) Christopher JS: Reliability of knee flexor peak torque measurements from a standardized test protocol on a kin/com dynamometer. Arch Phys Med Rehabil 73: 15-21, 1992. |
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| Title | Effect of Body Position on Knee Flexor Peak and Average Torques |
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