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Kenan Erdağı
Mehmet Kaan Altunok
Osman Tüfekçi
Raif Özel
Bülent Işık
Sönmez Bayram Ünüvar


OBJECTIVE: To find out the quadriceps femoris angle (Q-angle) values of elite and non-elite athletes in Olympic style weightlifting.

METHODS: This study included 22 male elite athletes that won medals in international Olympic style weightlifting championships and 22 male non-elite athletes who won medals in national Olympic style weightlifting championships. A goniometer was used to determine the angle of the quadriceps femoris muscle while the athletes were in supine position and the muscle was inactivated.  Anthropometric measurements of right-left thigh and lower leg length, right-left thigh and calf girth, and pelvic width of athletes were obtained. One repetition maximum of snatch, clean and jerk and leg strength of the athletes was recorded. To study demographic characteristics and some anthropometric values of lower extremity of the athletes, t-Test was conducted for independent groups. To compare anthropometric measurements of right-left lower extremity and right-left Q-angle values, paired sample t-Test was used. Right-left Q-angle values and relations among other variables were studied by Pearson correlation analysis. SPSS was used for all analyses.

RESULTS: Mean age was 19.73±2.97 years and 18.73±1.55 years for of elite and non-elite athletes respectively. No significant difference was observed in demographic characteristics and in some anthropometric values of lower extremity of elite and non-elite athletes (p>0.05). However, right-left Q-angle values of non-elite athletes (10.14±1.55o and 10.14±1.52o, respectively) were higher than the right-left Q-angle values of elite athletes (8.32±1.39o and 8.32±1.32o, respectively) [p<0.003].

CONCLUSIONS: Olympic style weightlifting, which is maintained in elite level, affects the quadriceps femoris angle.

Article Details

How to Cite
Erdağı, K., M. Altunok, O. Tüfekçi, R. Özel, B. Işık, and S. Ünüvar. “QUADRICEPS FEMORIS ANGLE OF ELITE AND NON-ELITE ATHLETES IN OLYMPIC STYLE WEIGHTLIFTING”. KHYBER MEDICAL UNIVERSITY JOURNAL, Vol. 14, no. 1, Mar. 2022, doi:10.35845/kmuj.2022.22016.
Original Articles


1. Smith TO, Hunt NJ, Donell ST. The reliability and validity of the Q-angle: a systematic review. Knee Surg Sports Traumatol Arthrosc 2008;16(12):1068-79. https://doi.org/10.1007/s00167-008-0643-6
2. Rauh MJ, Koepsell TD, Rivara FP, Rice SG, Margherita AJ. Quadriceps angle and risk of injury among high school cross-country runners. J Orthop Sports Phys Ther 2007;37(12):725-33. https://doi.org/10.2519/jospt.2007.2453
3. O'brien M. Clinical anatomy of the patellofemoral joint. Int Sport Med J 2001;2(1):1-8.
4. Shambaugh JP, Klein A, Herbert JH. Structural measures as predictors of injury basketball players. Med Sci Sports Exerc 1991;23(5):522-7.
5. Byl T, Cole JA, Livingston LA. What Determines the Magnitude of the Q Angle? A Preliminary Study of Selected Skeletal and Muscular Measures. J Sport Rehab 2000;9(1):26-34. https://doi.org/10.1123/jsr.9.1.26
6. Bloomfield J, Polman R, O'Donoghue P, McNaughton L. Effective speed and agility conditioning methodology for random intermittent dynamic type sports. J Strength Cond Res 2007;21(4):1093-100. https://doi.org/10.1519/r-20015.1
7. Hewett TE, Myer GD, Ford KR, Colosimo AJ, McLean SG, Paterno MV, et al. Biomechanical measures of neuromuscular control and valgus loading of the knee predict anterior cruciate ligament injury risk in female athletes: a prospective study. Am J Sports Med 2005;33(4):492-501. https://doi.org/10.1177/0363546504269591
8. Mohanty NR, Tiwari A, Koley S. Bilateral correlation of q-angle with selected lower extremity biomechanical alignment variables ın state level female basket-ball players. Eur J Phys Educ Sport Sci 2019;5(7):26-35. https://doi.org/10.5281/zenodo.2603135
9. Saç A, Taşmektepligil MY. Correlation between the q angle and the isokinetic knee strength and muscle activity. Turk J Phys Med Rehabil 2018;64(4):308-13. https://doi.org/10.5606/tftrd.2018.2366
10. Hahn T, Foldspang A. The Q angle and sport. Scand J Med Sci Sports 1997;7(1):43- 8. https://doi.org/10.1111/j.1600-0838.1997.tb00116.x
11. Kishali NF, İmamoglu O, Burmaoglu G, Atan T, Yildirim K. Q-angle values of elite soccer and taekwondo athletes. Pain Clin 2004;16(1):27-33. https://doi.org/10.1163/156856904322858675
12. Eliöz M, Atan T, Saç A, Yamak B. The investigion of the relatonship between some physicial features with q angle in athletes and sedanteres. J Sports Performance Res 2015;6(1):58-65. https://doi.org/10.17155/spd.76168
13. Livingston LA, Mandigo JL. Bilateral q angle asymmetry and anterior knee pain syndrome. Clin Biomech (Bristol, Avon) 1999;14(1):7-13. https://doi.org/10.1016/s0268-0033(98)00045-x
14. Erdağı K. The investigation of angle values of quadriceps femoris in male weightlifters. Kilis 7 Aralık Üniversitesi Beden Eğitimi ve Spor Bilimleri Dergisi 2020;4(1):10-17.
15. Bayraktar B, Yücesir İ, Öztürk A, Çakmak AK, Taşkara N, Kale A, et al. Change of quadriceps angle values with age and activity. Saudi Med J 2004;25(6):756-60.
16. Rauh M.J, Koepsell T.D, Rivara F.P, Rice S.G, Margherita A.J. Quadriceps angle and risk of ınjury among high school cross-country runners. Journal of Orthopaedic & Sports Physical Therapy 2007; 37(12): 725–733. https://doi.org/10.2519/jospt.2007.2453
17. Weiss L, DeForest B, Hammond K, Schilling B, Ferreira L. Reliability of goniometry-based Q-angle. Pain Med Rehab 2013;5(9):763-8. https://doi.org/10.1016/j.pmrj.2013.03.023
18. Caia J, Weiss LW, Chiu LZ, Schilling BK, Paquette MR. Consistency of lower-body dimensions using surface landmarks and simple measurement tools. J Strength Cond Res 2016;30(9): 2600-8. https://doi.org/10.1519/jsc.0000000000001353
19. Mohamed EE, Useh U, Mtshali BF. Q-angle, Pelvic width, and Intercondylar notch width as predictors of knee injuries in women soccer players in South Africa. Afr Health Sci 2012;12(2):174-80. https://doi.org/10.4314/ahs.v12i2.15
20. Eston R (ed). Kinanthropometry and exercise physiology laboratory manual. 3rd edition 2008; Routledge, London, United Kingdom. ISBN 9780203868744. https://doi.org/10.4324/9780203868744
21. Norton KI. Standards for anthropometry assessment. In: Eston R, Norton K, Kinanthropometry and Exercise Physiology. 4th ed 2018;68-137. Routledge, London, United Kingdom. https://doi.org/10.4324/9781315385662
22. Saygın Ö, Polat Y, Karacabey K. The effects of movement training, applied to children on their physical fitness parameters. Fırat Üniversitesi Sağlık Bilimleri Dergisi 2005;19(3):205-12.
23. Cinar O, Viechtbauer W. The poolr package for combining independent and dependent p values. J Stat Softw 2022;101(1):1-42. https://doi.org/10.18637/jss.v101.i01
24. Wheeless III CR. Q angle of the Knee. In Wheeless III CR,Nunley AJ, Urbaniak JR (ed) Wheeless' Textbook of Orthopaedics. Duke Orthopedics, Data Trace Internet Publishing LLC 2012. [Accesses on: Spetember 01, 2021]. Available from: http://www.wheelessonline.com/ortho/q_angle_of_the_knee.
25. Tsakoniti AE, Stoupis CA, Athanasopoulos SI. Quadriceps cross-sectional area changes in young healthy men with different magnitude of Q angle. J Appl Physiol 2008;105(3):800-4. https://doi.org/10.1152/japplphysiol.00961.2007
26. Hazar K, Gürsoy R, Günay AR. The analysis of patella femoral (q) angle’s correlation between leg strength and balance ın athletes. Niğde Uni J Phys Educ Sport Sci 2016;10(2):182-92.
27. Akınoğlu B, Kocahan T, Kabak B, Ünüvar E, Hasanoğlu A. Investigation of the relationship between quadriceps angle and quadriceps muscle strength in male athletes. Türkiye Klinikleri J Sports Sci 2020;12(2):129-36. https://doi.org/10.5336/sportsci.2019-71553