ISSN 2415-3060 (print), ISSN 2522-4972 (online)
  • 54 of 59
JMBS 2020, 5(5): 400–405
Physical training and Sport. Theoretical and methodical aspects of physical education and sport

Reliability and Validity of a New Test of Change of Direction in Padel Athletes

Attia Ahmed 1, Negra Yassine 1, Sammoud Senda 2, Khemiri Aymen 1, Farhat Nejiba 3, Petrova Lilliya G. 4, Rejab Nejib 5, Khalifa Riadh 1, Chortane Sabri G. 6

Change of direction is often considered as one of the main determinants of successful performance in many field sports. It is routinely measured using field‐based tests. Thus, coaches have to use valid and reliable tests to assess the change of direction ability for their athletes. However, controversy regarding test selection still exists based upon the specificity of the tests. The purpose of this study was to analyze the validity and reliability of a specific test of change of direction in padel athletes. Methods: Twenty three male Padel players (mean±SD: 31.6 ans±7.96 year; 81.1 kg±9.95 kg; 181.1 cm±5.26 cm) volunteered for this study. They completed the change of direction modified T-tests and a Padel change of direction specific test on separate days. Material and methods. The study was performed in two stages. The first stage of our study investigated the reliability of the Padel change of direction specific test. After familiarization, the athletes performed the Padel change of direction specific test on two occasions, seven days apart and at the same time of day. Relative reliability of the Padel change of direction specific test performance was assessed using the intraclass correlation coefficient (ICC3,1), while absolute reliability was expressed in terms of the standard error of measurement. The sensitivity of Padel change of direction specific test was revealed by comparing standard error of measurement to the value of the smallest worthwhile change. In the second stage of our study Pearson product-moment correlation coefficient was used to determine the convergent construct validity between Padel change of direction specific test and the modified T-test. Results and discussion. There were no significant systematic bias between Padel change of direction specific test (7.89±0.47 second) and retest (7.91±0.49 second) performance in the first phase. The Padel change of direction specific test showed good relative (ICC = 0.96) and absolute (SEM % = 1.35%) reliability of the Padel change of direction specific test. The Padel change of direction specific test capacity to detect change was rated as “good”. Its standard error of measurement (0.11) was smaller than its smallest worthwhile change (0.26). The results of the second stage of our study, revealed that the Padel change of direction specific test was significantly associated with the the modified T-test (r= 0.77; R² = 60.2%; p < 0.001). Conclusion. Taking into account the Padel change of direction specific test high relative and absolute reliability and the appropriate level of usefulness, Padel change of direction specific test can be considered as a standard measure and a suitable protocol for quantifying change of direction in Padel players. This information may be considered to be important for trainers aiming to assess change of direction in Padel players

Keywords: agility, physical fitness, reproductibility

Full text: PDF (Eng) 335K

  1. Courel-Ibáñez J, Martínez BJSA, Cañas J. Game performance and length of Rally in professional padel players. J Hum Kinet. 2017; 30(55): 161-69.
  2. WPT. World Padel Tour Official Calendar. 2017. Available from:
  3. Priego JI, Melis JO, Llana-Belloch S, Pérez-Soriano P, González García JC, Almenara MS. Padel: A quantitative study of the shots and movements in the high performance. J Hum Sport Exerc. 2013; 8(4): 925-31.
  4. Torres-Luque G, Ramirez A, Cabello-Manrique D, Nikolaidis PT, Alvero-Cruz JR. Match analysis of elite players during paddle tennis competition. Int J Perform Anal Sport. 2015; 15: 1135-44.
  5. Courel-Ibáñez J, Martínez BJSA, Bernardino J, Muñoz Marín D. Exploring game dynamics in Paddel: Implications for assessment and training. J Strength Cond Res. 2019; 33(7): 1971-77.
  6. Sassi, RH, Dardouri, W, Yahmed, MH, Gmada, N, Mahfoudhi, ME, Gharbi, Z. Relative and absolute reliability of a modified agility t-test and its relationship with vertical jump and straight sprint. J Strength Cond Res. 2009; 23(6): 1644-51.
  7. Liow DK, Hopkins WG. Velocity specificity of weight training for kayak sprint performance. Med Sci Sports Exerc. 2003; 35: 1232-1237.
  8. Faul, F and Erdfelder, E. GPOWER: A Priori, post-Hoc, and compromise power Analyses for MS-DOS (Computer Program). Bonn, FRG: Bonn University, Department of Psychology, (2004). Available from:
  9. Impellizzeri FM, Marcora SM. Test validation in sport physiology: Lessons learned from clinimetrics. Inter J Sports Physiol Perform. 2009; 4: 269-77.
  10. Weir JP. Quantifying test-retest reliability using the intraclass correlation coefficient and the SEM. J Strength Cond Res. 2005; 19: 231-40.
  11. Pauole KK, Madole J, Garhammer M, Lacourse, Rozenek R. Reliability and validity of the T-test as a measure of agility, leg power, and leg speed in college-aged men and women. J Strength Cond Res. 2000; 14: 443-50.
  12. Nevill A, Atkinson G. Assessing agreement between measurements recorded on a ratio scale in sports medicine and sports science. Br J Sports Med. 1997; 31: 314-18.
  13. Lexell JE, Downham DY. How to assess the reliability of measurements in rehabilitation. Am J Phys Med Rehabil. 2005; 84: 719-23.
  14. Armstrong R, Greig M. The Functional Movement Screen and modified Star Excursion Balance Test as predictors of T-test agility performance in university rugby union and netball players. Phys Ther Sport. 2018; 31: 15-21.
  15. Muniroglu S, Subak E. A Comparison of 5, 10, 30 Meters Sprint, Modified T-Test, Arrowhead and Illinois Agility Tests on Football Referees. Journal of Education and Training Studies. 2018; 6(8).