Korean J Sports Med.  2022 Jun;40(2):128-137. 10.5763/kjsm.2022.40.2.128.

Comparison of Isokinetic Knee Strength Profiles According to History of Knee Surgery in Korean Women’s Professional Basketball Players

  • 1College of Sport Science, Sungkyunkwan University, Suwon, Korea
  • 2Samsung Training Center, Suwon, Korea


This study compared isokinetic knee strength profiles by knee surgery history in basketball players.
A total of 17 professional female basketball players (age, 23.7±3.8 years) participated in this study. All the participants performed maximal isokinetic knee strength test concentrically at a velocity of 60°• sec −1 and 180°• sec −1 . Strength variables included peak torque (PT), body mass normalized PT (NPT), bilateral strength difference (BD), hamstrings to quadriceps strength (H/Q) ratio. Independent t-test and one-way analysis of variance were used to compare mean differences in the measured parameters by knee surgery history and limb-based sugroups, respectively.
Nine subjects had a history of knee surgery. At all velocities, there were no significant group differences in PTs, NPTs, BDs, and H/Q ratios of the knee extensor and flexor muscles by knee surgery history. Overall, NPTs of knee extensor and flexor muscles were 2.91−3.01 N• m• kg −1 and 1.55−1.59 N• m• kg−1 , respectively, and H/Q ratios ranged from 52% to 55%. At 180°• sec −1 . NPTs of knee extensor and flexor muscles were 1.90−1.92 N• m• kg −1 and 1.08−1.10 N• m• kg −1 , respectively, and H/Q ratios ranged from 57% to 58%.
The current findings suggested that isokinetic knee strength profiles measured at 60°• sec −1 and 180°• sec −1 velocities were similar regardless of a history of knee surgery in the professional female basketball players.


Isokinetic knee strength; Basketball players; Knee injuries; Quadriceps; Peak torque


1. Dick R, Hertel J, Agel J, Grossman J, Marshall SW. 2007; Descriptive epidemiology of collegiate men's basketball injuries: National Collegiate Athletic Association Injury Surveillance System, 1988-1989 through 2003-2004. J Athl Train. 42:194–201.
2. Kerr ZY, Marshall SW, Dompier TP, Corlette J, Klossner DA, Gilchrist J. 2015; College sports-related injuries: United States, 2009-10 through 2013-14 academic years. MMWR Morb Mortal Wkly Rep. 64:1330–6. DOI: 10.15585/mmwr.mm6448a2. PMID: 26655724.
3. Deitch JR, Starkey C, Walters SL, Moseley JB. 2006; Injury risk in professional basketball players: a comparison of Women's National Basketball Association and National Basketball Association athletes. Am J Sports Med. 34:1077–83. DOI: 10.1177/0363546505285383. PMID: 16493173.
4. Drakos MC, Domb B, Starkey C, Callahan L, Allen AA. 2010; Injury in the national basketball association: a 17-year overview. Sports Health. 2:284–90. DOI: 10.1177/1941738109357303. PMID: 23015949. PMCID: PMC3445097.
5. Baker H, Rizzi A, Athiviraham A. 2020; Injury in the Women's National Basketball Association (WNBA) from 2015 to 2019. Arthrosc Sports Med Rehabil. 2:e213–7. DOI: 10.1016/j.asmr.2020.02.003. PMID: 32548586. PMCID: PMC7283941.
6. Bove T, Rodas G, Pedret C, Esparza F, Casals M. 2019; Analysis of the injuries of a professional basketball team during 22 seasons attended by the same physiotherapist. Apunts Med Esport. 54:139–47. DOI: 10.1016/j.apunts.2019.07.006.
7. Ito E, Iwamoto J, Azuma K, Matsumoto H. 2014; Sex-specific differences in injury types among basketball players. Open Access J Sports Med. 6:1–6. DOI: 10.2147/OAJSM.S73625. PMID: 25565908. PMCID: PMC4284005.
8. Song M, Choi S, Kim H, Kim Y, Lee S, Kang HS. 2020; Analysis of the injuries of Korean professional basketball players during the 2019–2020 regular season. Korean J Sports Med. 38:182–9. DOI: 10.5763/kjsm.2020.38.3.182.
9. Schiltz M, Lehance C, Maquet D, Bury T, Crielaard JM, Croisier JL. 2009; Explosive strength imbalances in professional basketball players. J Athl Train. 44:39–47. DOI: 10.4085/1062-6050-44.1.39. PMID: 19180217. PMCID: PMC2629038.
10. Natri A, Järvinen M, Latvala K, Kannus P. 1996; Isokinetic muscle performance after anterior cruciate ligament surgery. Long-term results and outcome predicting factors after primary surgery and late-phase reconstruction. Int J Sports Med. 17:223–8. DOI: 10.1055/s-2007-972836. PMID: 8739578.
11. Halinen J, Lindahl J, Hirvensalo E. 2009; Range of motion and quadriceps muscle power after early surgical treatment of acute combined anterior cruciate and grade-III medial collateral ligament injuries. A prospective randomized study. J Bone Joint Surg Am. 91:1305–12. DOI: 10.2106/JBJS.G.01571. PMID: 19487506.
12. Ageberg E, Roos HP, Silbernagel KG, Thomeé R, Roos EM. 2009; Knee extension and flexion muscle power after anterior cruciate ligament reconstruction with patellar tendon graft or hamstring tendons graft: a cross-sectional comparison 3 years post surgery. Knee Surg Sports Traumatol Arthrosc. 17:162–9. DOI: 10.1007/s00167-008-0645-4. PMID: 18982311.
13. Delextrat A, Cohen D. 2009; Strength, power, speed, and agility of women basketball players according to playing position. J Strength Cond Res. 23:1974–81. DOI: 10.1519/JSC.0b013e3181b86a7e. PMID: 19855320.
14. Park EK, Kim JS, Park DH. 2018; Comparison of anthropometric and physical fitness characteristics of Korean female professional basketball players by class and playing position. Exerc Sci. 27:200–8. DOI: 10.15857/ksep.2018.27.3.200.
15. Buchanan PA, Vardaxis VG. 2009; Lower-extremity strength profiles and gender-based classification of basketball players ages 9-22 years. J Strength Cond Res. 23:406–19. DOI: 10.1519/JSC.0b013e3181942140. PMID: 19209081.
16. Hadzić V, Erculj F, Bracic M, Dervisević E. 2013; Bilateral concentric and eccentric isokinetic strength evaluation of quadriceps and hamstrings in basketball players. Coll Antropol. 37:859–65. PMID: 24308229.
17. Kabacinski J, Murawa M, Mackala K, Dworak LB. 2018; Knee strength ratios in competitive female athletes. PLoS One. 13:e0191077. DOI: 10.1371/journal.pone.0191077. PMID: 29315348. PMCID: PMC5760073.
18. Croisier JL, Ganteaume S, Binet J, Genty M, Ferret JM. 2008; Strength imbalances and prevention of hamstring injury in professional soccer players: a prospective study. Am J Sports Med. 36:1469–75. DOI: 10.1177/0363546508316764. PMID: 18448578.
19. Sutton KM, Bullock JM. 2013; Anterior cruciate ligament rupture: differences between males and females. J Am Acad Orthop Surg. 21:41–50. DOI: 10.5435/JAAOS-21-01-41. PMID: 23281470.
20. Quatman CE, Hewett TE. 2009; The anterior cruciate ligament injury controversy: is "valgus collapse" a sex-specific mechanism? Br J Sports Med. 43:328–35. DOI: 10.1136/bjsm.2009.059139. PMID: 19372087. PMCID: PMC4003572.
21. Emami MJ, Ghahramani MH, Abdinejad F, Namazi H. 2007; Q-angle: an invaluable parameter for evaluation of anterior knee pain. Arch Iran Med. 10:24–6. PMID: 17198449.
22. Ekim AA, Hamarat H, Musmul A. 2017; Relationship between Q-angle and articular cartilage in female patients with symptomatic knee osteoarthritis: ultrasonographic and radiologic evaluation. Arch Rheumatol. 32:347–52. DOI: 10.5606/ArchRheumatol.2017.6145. PMID: 29901018. PMCID: PMC5868394.
23. Krosshaug T, Nakamae A, Boden BP, et al. 2007; Mechanisms of anterior cruciate ligament injury in basketball: video analysis of 39 cases. Am J Sports Med. 35:359–67. DOI: 10.1177/0363546506293899. PMID: 17092928.
24. Zedde P, Mela F, Del Prete F, Masia F, Manunta AF. 2015; Meniscal injuries in basketball players. Joints. 2:192–6. DOI: 10.11138/jts/2014.2.4.192. PMID: 25750909. PMCID: PMC4334220.
25. Omi Y, Sugimoto D, Kuriyama S, et al. 2018; Effect of hip-focused injury prevention training for anterior cruciate ligament injury reduction in female basketball players: a 12-year prospective intervention study. Am J Sports Med. 46:852–61. DOI: 10.1177/0363546517749474. PMID: 29360406.
26. Rambaud A, Ardern CL, Thoreux P, Regnaux JP, Edouard P. 2018; Criteria for return to running after anterior cruciate ligament reconstruction: a scoping review. Br J Sports Med. 52:1437–44. DOI: 10.1136/bjsports-2017-098602. PMID: 29720478.
27. Bauer KL. 2018; Osteochondral injuries of the knee in pediatric patients. J Knee Surg. 31:382–91. DOI: 10.1055/s-0038-1625956. PMID: 29381884.
28. Rouis M, Coudrat L, Jaafar H, et al. 2015; Assessment of isokinetic knee strength in elite young female basketball players: correlation with vertical jump. J Sports Med Phys Fitness. 55:1502–8. PMID: 25373468.
Full Text Links
  • KJSM
export Copy
  • Twitter
  • Facebook
Similar articles
Copyright © 2024 by Korean Association of Medical Journal Editors. All rights reserved.     E-mail: koreamed@kamje.or.kr