The rapid recovery of vertical force propulsion production and postural sway after a specific fatigue protocol in female handball athletes

Author(s)

Souza Bedo, Bruno Luiz ^{[1, 2, 3]} ; Pereira, Dayanne Rodrigues ^{[4, 1, 3]} ; Moraes, Renato ^{[1, 2, 5]} ; Kalva-Filho, Carlos Augusto ^{[2, 5]} ; Will-de-Lemos, Tenysson ^{[1, 3]} ; Pereira Santiago, Paulo Roberto ^{[1, 2, 5]}

Affiliation

^[1] Univ Sao Paulo, Sch Phys Educ & Sport Ribeirao Preto, Biomech & Motor Control Lab, Av Bandeirantes 3900, BR-14040907 Ribeirao Preto, SP - Brazil

^[2] Univ Sao Paulo, Ribeirao Preto Med Sch, Rehabil & Funct Performance Grad Program, Ribeirao Preto, SP - Brazil

^[3] 3900 Monte Alegre, BR-14040900 Ribeirao Preto, SP - Brazil

^[4] Univ Sao Paulo, Ribeirao Preto Med Sch, Ribeirao Preto, SP - Brazil

^[5] 3900 Monte Alegre, BR-14040907 Ribeirao Preto, SP - Brazil

• Document type: Journal article
• Source: GAIT & POSTURE; v. 77, p. 52-58, MAR 2020.
• Web of Science Citations: 0

Abstract

Background: Muscle fatigue is characterized by a decrease in muscle performance, accompanied by an increase in perceived exertion to produce a desired amount of force. The duration of the fatigue effects is not completely clear regarding postural sway and force production in athletes. Research question: What is the effect of a specific fatigue protocol in postural sway and force production in female handball athletes and the recovery time necessary for these variables? Methods: Twenty female handball athletes participated in this study. Specific handball actions composed the fatigue protocol in the format of a circuit with the gradual increment of laps. They stood upright in one-leg posture on a force plate. For the maximum propulsion force (F-MAX), they performed a countermovement jump on the force plate. The center of pressure (COP) and the F-MAX were obtained at baseline, immediately after the exhaustion due to the fatigue protocol and every minute during the first 10 min of the recovery phase. Results: The F-MAX decreased similar to 9.5% after the fatigue protocol, whereas de COP area increased 224%. During the recovery phase, the F-MAX and the COP area returned to baseline values after five minutes. Significance: The first five minutes immediately after the fatigue protocol represent the time interval where the fatigue effects are still present. Future studies willing to investigate the effects of fatigue in athletes should perform the analysis within this short time-window. (AU)

• FAPESP's process: 18/20362-8 - Effect of a specific handball protocol fatigue on semi-static postural control on handball athletes
• Grantee: Dayanne Rodrigues Pereira
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 19/04721-0 - XXVII Congress of the International Society of Biomechanics
• Grantee: Paulo Roberto Pereira Santiago
• Support Opportunities: Research Grants - Meeting - Abroad
• 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