A biomechanical analysis of differences between natural and clinical angle degrees and correlations to performance in road cycling

Keywords: back curve, functional threshold power, natural angle, clinical angle, cyclist


Background and Study Aim. The study aims to determine differences between natural and clinical angle degrees in hips and shoulders, and determination of the correlations between angle degrees and functional threshold power (FTP) in road cycling athletes. Material and Methods. The study includes 11 male road cycling athletes aged 14-16 years old. The volunteer's body weight average was determined as 68.5±14.58, body height average was 175.4±6.98, and body mass index average 21.8±3.87. Volunteers are active athletes in “Büyükçekmece Road Cycling Team”. To measure the performance of the cyclists clinical hip angle, clinical shoulder angle, hip angle degree, shoulder angle, functional threshold power (FTP) tests were used. The Kinovea 0.8.15 program was used in the data analysis of the variables in the study. Analyzes were performed using SPSS 26 analysis program. The analyses of the Shapiro Wilks test resulted in the normal distribution of the variables included in the study.  Correlations between FTP test parameters and angle degrees, the correlation of a continued variable were calculated with Pearson correlation. Results. A statistically significant correlation between functional threshold power parameters such as distance, power avarege, total energy, cadance avarege, speed avarege, functional threshold power, and hip angle degree parameter (p<0.05). Similarly, correlations between functional threshold power, parameters such as power avarege and back curve resulted to be statistically significant (p<0.05). Also, like an functional threshold power parameter, speed avarege resulted to be in a significant correlation with the clinical shoulders angle degree. Conclusions. Based on these results, increases in the FTP parameters may affect positively the cyclist’s performance helping to avoid undesirable hip angles, which may lead to back pain. Similarly, power average and back curve degree resulted to be in a correlation. Therefore, the back curve degree may be increased or decreased by the changes in the power average parameter.  In addition, during the high intensity of training and fatigue levels increased, the clinical hip and shoulder angles were also increased.


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Author Biographies

Aliye Büyükergün, Istanbul Gelisim University
abuyukergun@gelisim.edu.tr; Coaching Department, School of Physical Education and Sport, Istanbul Gelisim University, Istanbul, Turkey.
Milaim Berisha, Istanbul Gelisim University; UBT College
mbeisha@gelisim.edu.tr  dr.milaimberisha@gmail.com; Coaching Department, School of Physical Education and Sport, Istanbul Gelisim University, Istanbul, Turkey.  UBT College, Faculty of Sports and Movement Sciences, Kosovo


1. Kılınç F, Aksoy I. Milli Yol Bisikletçisinin Bikefit (Bisiklet Ile Fiziksel Uyumluluk) Analizinin Mekanik Ve Appa Bikefit Programiyla Karşilaştirmali Incelenmesi [A Comparative Analysis of National Road Cyclist's Bike Fit (Physical Compatibility with Bicycle) Analysis with Mechanics and Appa Bikefit Program]. Sivas Cumhuriyet Üniversitesi Spor Bilimleri Dergisi, 2017; 2 (2): 76-86. (In Turkish).

2. Holliday W, Fisher J, Theo R, Swart J. Static versus dynamic kinematics in cyclists: A comparison of goniometer, inclinometer and 3D motion capture, European Journal of Sport Science, 17:9, 1129-1142.

3. Syahrul M, Nizam M. Anterior Knee Pain (Patellar Tendonitis) Management And Modification In Bike Fitting For A Track Cyclist. Proceedings of the 30th Annual Conference of Biomechanics in Sports, Melbourne; 2012; (203):290–93.

4. Schulz SJ, Gordon SJ. Riding position and lumbar spine angle in recreational cyclists: A pilot study. Int J Exerc Sci, 2010; 3(4):174-181.

5. Dettori NJ, Norvell DC. Non-traumatic bicycle injuries: A review of the literature. Sports Medicine, 2006; 36(1): 7–18.

6. Süzen LB. Hareket sistemi anatomisi ve kinesiyoloji [Movement system anatomy and kinesiology]. Istanbul: Nobel Medical Bookstores; 2017. (In Turkish).

7. Mellion MB. Common cycling injuries: Management and prevention. Sports Medicine, 1991;11:52-70.

8. Jeffreys I. Warm-up revisited: The ramp method of optimizing warm-ups. Prof Strength Cond, 2007; (6):12.

9. Clarsen BR, Bahr MW, Heymans M, Engedahl G, Midtsundstad L, Rosenlund, G. Thorsen, and G. Myklebust. “The Prevalence and Impact of Overuse Injuries in Five Norwegian Sports: Application of a New Surveillance Method.” Scandinavian Journal of Medicine and Science in Sports, 2015; 25(3):323–30.

10. Streisfeld GM, Bartoszek C, Creran E, Inge B, McShane MD, Johnston T. Relationship between body positioning, muscle activity, and spinal kinematics in cyclists with and without low back pain: A systematic review. Sports Health, 2017; 9(1): 75–79.

11. Muyor JM., Zabala M. Road Cycling and Mountain Biking Produces Adaptations on the Spine and Hamstring Extensibility. International Journal of Sports Medicine, 2015; 37(1):43–49.

12. Karasar N. Bilimsel araştırma yöntemi [Scientific research method]. Ankara: Nobel Publishing; 2012.

13. Swart J, Holliday W. Cycling Biomechanics Optimization - The (R) Evolution of Bicycle Fitting. Current Sports Medicine Reports, 2019; 18(12):490–96.

14. Ansley L, Patrick C. Determinants of ‘Optimal’ Cadence during Cycling. European Journal of Sport Science. 2009;9 (2):61–85.

15. Wilson IJ. Wattbike. [Internet]. 2007. [updated 2022; cited 2022 Jan 20]. Available from: https://wattbike.com/

16. Kinovea 0.8.15. 2006-2011. [Internet]. 2021. [updated 2021 Apr 15; cited 2021 Feb 5]. Available from: https://www.kinovea.org/

17. Hoof WV, Volkaerts K, O'Sullivan K, Verschueren S, Dankaerts W. Comparing lower lumbar kinematics in cyclists with low back pain (flexion pattern) versus asymptomatic controls – field study using a wireless posture monitoring system, Manual Therapy, 2012;17(4):312-317.

18. Salai M, Brosh T, Blankstein A, Oran A, Chechik A. Effect of changing the saddle angle on the incidence of low back pain in recreational bicyclists. British Journal of Sports Medicine, 1999;33(6):398-400.

19. Kotler DH, Babu A, Robidoux G. Prevention, Evaluation, and Rehabilitation of Cycling-Related Injury, Current Sports Medicine Report, 2016; 15(3):199-206.
How to Cite
Büyükergün A, Berisha M. A biomechanical analysis of differences between natural and clinical angle degrees and correlations to performance in road cycling. Pedagogy of Physical Culture and Sports. 2022;26(3):144-50. https://doi.org/10.15561/26649837.2022.0301