Critical points of performance in repeated sprint: A kinematic approach

Author(s)

de Andrade, V. L. ^{[1, 2, 3]} ; Palucci Vieira, L. H. ^{[1, 3, 4]} ; Kalva-Filho, C. A. ^{[3, 4]} ; Santiago, P. R. P. ^{[1, 3]}

Affiliation

^[1] Univ Sao Paulo, Sch Phys Educ & Sport Ribeirao Preto, LaBioCoM Biomech & Motor Control Lab, Ribeirao Preto, SP - Brazil

^[2] Sao Paulo State Univ, Biosci Inst Rio Claro, Phys Educ Dept, Rio Claro, SP - Brazil

^[3] Univ Sao Paulo, Fac Med Ribeirao Preto FMRP, Postgrad Program Rehabil & Funct Performance, Ribeirao Preto, SP - Brazil

^[4] Sao Paulo State Univ, Fac Sci, MoVI LAB Human Movement Res Lab, Grad Program Movement Sci, UNESP, Campus Bauru, Bauru, SP - Brazil

• Document type: Journal article
• Source: SCIENCE & SPORTS; v. 36, n. 4 SEP 2021.
• Web of Science Citations: 0

Abstract

Purpose. - The objectives of the present study were to analyze possible changes in biomechanical patterns during a repeated sprint protocol and identify the mechanical factors that could influence performance. Methods. - Sixteen male athletes (22.1 +/- 3.1 years old, 78.6 +/- 22.9 kg and 186.1 +/- 10.1 cm in height) participated in this study. Warm-up exercises were performed. Thereafter, the subjects carried out the Running Anaerobic Sprint Test (RAST), composed of six explosive effort sprints of 35 m separated by 10 s of passive recovery. During the protocol, performed on an official indoor court (rigid surface), two cameras recorded performance parameters (time) while twelve cameras (OptiTrack (TM) Natural Point Inc. - USA) adjusted to 120 Hz, monitored the 3-D running kinematics. Results. - The time length of effort (+11.6%; P < 0.05) increased from the first (4.67 +/- 0.39 s) to the sixth (5.28 +/- 0.36 s) repetitions. Significant changes were identified in stride frequency, contact time, stride time, horizontal speed of core body mass (BCM), and angle of thigh at touchdown (-14.9%; 19.1%; 8.2%; 17.0%; -18.8%; P < 0.05). Correlations were found between common step variables (i.e., S-F and T-S) and complex variables of the ankle, hips, and center of mass (BCM) kinematics (i.e., phi thigh(TD), phi thigh(TO), STDz(H), phi knee(TD), theta ankle(TD), and theta ankle(TO)) with the minimum Time (4.43 +/- 0.37 s) and mean Time (4.91 +/- 0.23 s) in the RAST. Conclusion. - We can conclude that RAST performed on-court modify the mechanics of running and both, common and advanced kinematic measures such as derived from ankle, hips, and BCM motion are mechanical outputs linked with performance in this repeated sprint model. (C) 2020 Elsevier Masson SAS. All rights reserved. (AU)

• FAPESP's process: 13/08302-6 - Changes in kicks performance associated with patterns of displacements during futsal matches
• Grantee: Luiz Henrique Palucci Vieira
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 10/20538-7 - Kinematic analysis of movements of rotation of the knee joint during a single-leg drop-landing by quaternions: gender differences
• Grantee: Paulo Roberto Pereira Santiago
• Support Opportunities: Regular Research Grants
• FAPESP's process: 16/50250-1 - The secret of playing football: Brazil versus the Netherlands
• Grantee: Sergio Augusto Cunha
• Support Opportunities: Research Projects - Thematic Grants