Maximal peak torque as a predictor of angle-specific torques of hamstring and quadriceps muscles in man

  • P. Kannus
  • M. Järvinen
  • M. Lehto


This study assessed the relationship between the isokinetic peak torque (PT) (speed of movement 1.05 and 3.14 rads−1) and the angle-specific torques (ASTs) at 0.26 and 1.31 rad of knee flexion in multiple contractions of the quadriceps and hamstrings in 70 individuals with a chronic anterior cruciate ligament (ACL) insufficiency and 78 individuals with a chronic medial collateral ligament (MCL) insufficiency in one knee. At every test speed, the Pearson product moment correlation coefficients (r) between the PT and ASTs were highly significant (P<0.001) in the uninjured knees (r=0.61–0.93) as well as in the knees with ACL (r=0.61–0.87) and MCL (r=0.74–0.91) insufficiency. In addition, in both groups the majority of the correlation coefficients exceeded 0.80, which is generally regarded as the threshold for the relationship to be considered clinically significant. Furthermore, using regression analysis, both extremities showed completely non-systematic distribution of the residuals. It is concluded that in healthy knees or knees with ACL or MCL insufficiency, the predictability of ASTs from PT was good, and, therefore, that AST analyses may offer little additional information about thigh muscle function to that obtained from a simpler and more commonly used measurement, the PT analysis.

Key words

Anterior cruciate ligament Medial collateral ligament insufficiency Isokinetic contraction Knee joint Torque relationship 


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  1. Baltzopoulos V, Brodie DA (1989) Isokinetic dynamometry. Applications and limitations. Sports Med 8:101–116Google Scholar
  2. Borges O (1989) Isometric and isokinetic knee extension and flexion torque in men and women aged 20–70. Scand J Rehabil Med 21:45–53Google Scholar
  3. Burdett RG, Van Swearingen J (1987) Reliability of isokinetic endurance tests. J Orthop Sports Phys Ther 8:484–488Google Scholar
  4. Burnie J, Brodie DA (1986) Isokinetic measurement in preadolescent males. Int J Sports Med 7:205–209Google Scholar
  5. Charteris J, Goslin B (1986) In vivo approximations of the classic in vitro length-tension relationship: an isokinetic evaluation. J Orthop Sports Phys Ther 7:222–231Google Scholar
  6. Dixon WJ (1983) BMDP statistical software. University of California Press, Berkeley, pp 1–733Google Scholar
  7. Eriksson E (1981) Rehabilitation of muscle function after sports injury — a major problem sports medicine. Int J Sports Med 2:1–6Google Scholar
  8. Fillyaw M, Bevins T, Fernandez L (1986) Importance of correcting isokinetic peak torque for effect of gravity when calculating knee flexor to extensor muscle ratios. Phys Ther 66:23–31Google Scholar
  9. Gilliam TB, Sady SP, Freedson PS, Villanacci J (1979) Isokinetic torque levels for high school football players. Arch Phys Med Rehabil 60:110–114Google Scholar
  10. Goslin BR, Charteris J (1979) Isokinetic dynamometry: normative data for clinical use in lower extremity (knee) cases. Scand J Rehabil Med 11:105–119Google Scholar
  11. Hislop HJ, Perrine JJ (1967)The isokinetic concept of exercise. Phys Ther 47:114–117Google Scholar
  12. Hughston JC, Andrews JR, Cross MJ, Moschi A (1976) Classification of knee ligament instabilities, parts I and II. J Bone Joint Surg [Am] 58:159–179Google Scholar
  13. Järvinen M, Kannus P (1985) Clinical and radiological long-term results after primary knee ligament surgery. Arch Orthop Trauma Surg 106:1–6Google Scholar
  14. Kannus P, Järvinen M (1987) Strength of quadriceps and hamstrings in knees with medial or lateral collateral ligament insufficiency. Scand J Sports Sci 9:79–83Google Scholar
  15. Kannus P, Järvinen M (1989) Prediction of torque acceleration energy and power of thigh muscles from peak torque. Med Sci Sports Exerc 21:304–307Google Scholar
  16. Kannus P, Latvala K, Järvinen M (1987) Thigh muscle strengths in the anterior cruciate ligament deficient knee: isokinetic and isometric long-term results. J Orthop Sports Phys Ther 9:223–227Google Scholar
  17. Knapik JJ, Ramos MU (1980) Isokinetic and isometric torque relationships in the human body. Arch Phys Med Rehabil 61:64–67Google Scholar
  18. Lyon LK, Benz LN, Johnson KK, Ling AC, Bryan J (1988) Qangle: a factor in peak torque occurrence in isokinetic knee extension. J Orthop Sports Phys Ther 9:250–253Google Scholar
  19. Milner-Brown HS, Mellenthin M, Miller RG (1986) Quantifying human muscle strength, endurance and fatigue. Arch Phys Med Rehabil 67:530–535Google Scholar
  20. Moffroid M, Kusiak ET (1975) The power struggle: definition and evaluation of power of muscular performance. Phys Ther 55:1098–1104Google Scholar
  21. Moffroid M, Whipple R, Hofkosh J, Lowman E, Thistle E (1969) A study of isokinetic exercise. Phys Ther 49:735–746Google Scholar
  22. Murray MP, Gardner GM, Mollinger LA, Sepic SB (1980) Strength of isometric and isokinetic contractions: knee muscles of men aged 20 to 86. Phys Ther 60:412–419Google Scholar
  23. Nicholas JJ, Robinson LR, Logan A, Robertson R (1989) Isokinetic testing in young nonathletic able-bodied subjects. Arch Phys Med Rehabil 70:210–213Google Scholar
  24. Perrin DH (1986) Reliability of isokinetic measures. Athletic training 21:319–321Google Scholar
  25. Perrin DH, Robertson RJ, Ray RL (1987) Bilateral isokinetic peak torque, torque acceleration energy, power, and work relationship in athletes and nonathletes. J Orthop Sports Phys Ther 9:184–189Google Scholar
  26. Rothstein JM, Delitto A, Sinacore DR, Rose SJ (1983) Electromyographic, peak torque, and power relationships during isokinetic movement. Phys Ther 63:926–933Google Scholar
  27. Rothstein JM, Lamb RL, Mayhew TP (1987) Clinical uses of isokinetic measurements. Critical issues. Phys Ther 67:1840–1844Google Scholar
  28. Schlinkman B (1984) Norms for high school football players derived from Cybex data reduction computer. J Orthop Sports Phys Ther 5:243–245Google Scholar
  29. Stafford MG, Grana WA (1984) Hamstrings/quadriceps ratios in college football players: high velocity evaluation. Am J Sports Med 12:209–211Google Scholar
  30. Thomee R, Renstrom P, Grimby G, Peterson L (1987) Slow or fast isokinetic training after knee ligament surgery. J Orthop Sports Phys Ther 8:475–479Google Scholar
  31. Westing SH, Seger JY (1989) Eccentric and concentric torque-velocity characteristics, torque output comparisons, and gravity effect torque corrections for the quadriceps and hamstring muscles in females. Int J Sports Med 10:175–180Google Scholar
  32. Westing S, Seger J, Karlson E, Ekblom B (1988) Eccentric and concentric torque-velocity characteristics of the quadriceps femoris in man. Eur J Appl Physiol 58:100–104Google Scholar
  33. Wigerstad-Lossing I, Grimby G, Jonsson T, Morelli B, Renstrom P (1988) Effects of electrical muscle stimulation combined with voluntary contractions after knee ligament surgery. Med Sci Sports Exerc 20:93–98Google Scholar
  34. Williams M, Stutzman L (1959) Strength variation through the range of joint motion. Phys Ther Rev 39:145–152Google Scholar
  35. Wyatt MP, Edwards AM (1981) Comparison of quadriceps and hamstring torque values during isokinetic exercise. J Orthop Sports Phys Ther 3:48–56Google Scholar

Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • P. Kannus
    • 1
    • 2
  • M. Järvinen
    • 2
  • M. Lehto
    • 2
  1. 1.McClure Musculoskeletal Research Center, Department of Orthopedics and RehabilitationUniversity of VermontBurlingtonUSA
  2. 2.UKK Institute for Health Promotion ResearchTampere Research Station of Sports MedicineTampereFinland

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