Int J Sports Med
DOI: 10.1055/s-0043-122738
Training & Testing
© Georg Thieme Verlag KG Stuttgart · New York

Functional Screening Tests: Interrelationships and Ability to Predict Vertical Jump Performance

Irineu Loturco1, 2, Lucas Adriano Pereira1, Ronaldo Kobal1, Cesar Cavinato Cal Abad1, William Komatsu2, Ronaldo Cunha2, Gustavo Arliani2, Benno Ejnisman2, Alberto de Castro Pochini2, Fábio Yuzo Nakamura3, Moises Cohen2
  • 1NAR - Nucleus of High Performance in Sport, Sport Science, São Paulo, Brazil
  • 2Universidade Federal de São Paulo, Escola Paulista de Medicina, Department of Orthopedics and Traumatology, São Paulo, Brazil
  • 3Universidade Estadual de Londrina, Departamento de Educação Física, Londrina, Brazil
Further Information

Publication History



accepted after revision 22 October 2017

Publication Date:
28 December 2017 (eFirst)

Abstract

There are several methods used in sports science to identify asymmetries in athletes, given their purported relevance to injury prevention and performance optimization. We aimed to verify whether asymmetries provided by isokinetic assessments, jump tests, and tensiomyography (TMG) are associated with each other, and whether their respective functional indices are related to jumping ability. TMG parameters, unilateral and bilateral squat-jump (SJ) and countermovement-jump (CMJ) performances, and peak torque in knee-extension and flexion with angular velocities of 60o/s and 300o/s for twenty-four soccer players were retained for analyses. Asymmetry was detected by examining the percentage difference between dominant and non-dominant legs. The median-split technique was used to identify the best and worst performers in SJ and CMJ tests. Results revealed that the asymmetries detected in the three different methods were not interrelated. Curiously, better performances in SJ and CMJ tests were associated with higher asymmetry levels. Furthermore, only the knee-extension peak torque at both angular velocities was correlated moderately to largely (r=0.48-0.66) with jump performance. Despite their recognized ability to predict the risk of injury, the absence of interrelationships between TMG, isokinetic tests, and unilateral jumps precludes their single use as a unique functional screening diagnostic. Finally, and very importantly, lower-limb asymmetry is not necessarily related to impaired vertical jump performance in soccer players.