In this study, we attempt to answer the following question: To what degree the higher muscular activity determined by increased load in the extension phase (eccentric muscle action) of vertical jump affects its efficiency? Ten high performance acrobats participated in this investigation. The acrobats performed tests that consisted of five single "maximal" standing vertical jumps (counter moveme...

Mailing address: rua Barão de Ataliba, 125, ap.11, Cambuí. 13024-140. Campinas, SP, Brasil. [email protected] ABSTRAcT Objective: To evaluate the sensitivity and specificity of different protocols for measurement of vertical jump tests for the diagnosis of explosive strength in soccer and volleyball players at puberty. Method: Cross-sectional study population of 110 non-probabilistic young...

ABSTRACT Study design: identify a better strategy for static stretching (SS), dynamic (DS), and proprioceptive neuromuscular facilitation (PNF) concerning the performance of their applications in countermovement vertical jump (CVJ). A systematic literature review was conducted May June 2021 Pubmed/MEDLINE, Scopus, LILACS, SPORTDiscus, Embase databases. The PRISMA-2020 checklist used. Cochrane h...

The aim of this study was to determine the effects of selected factors on horizontal-to-vertical velocity conversion in the triple jump. An understanding of this conversion is important not only for studies on the techniques of the triple jump, but also for other jumping events. Ten elite jumpers were studied. Three-dimensional kinematic data were collected for at least four complete trials in ...

PURPOSE Running at high speed and sudden change in direction or activity stresses the knee. Surprisingly, not many studies have investigated the effects of sprinting on knee's kinetics and kinematics of soccer players. Hence, this study is aimed to investigate indices of injury risk factors of jumping-landing maneuvers performed immediately after sprinting in male soccer players. METHODS Twen...

Stretching before performance is a common practice among athletes in hopes of increasing performance and reducing the risk of injury. However, cumulative results indicate a negative impact of static stretching and proprioceptive neuromuscular facilitation (PNF) on performance; thus, there is a need for evaluating other stretching strategies for effective warm-up. The purpose of this study was t...

The purpose of this study was to investigate the effect of a combined heavy-resistance and running-speed training program performed in the same training session on strength, running velocity (RV), and vertical-jump performance (VJ) of soccer players. Thirty-five individuals were divided into 3 groups. The first group (n = 12, COM group) performed a combined resistance and speed training program...