Eduardo Macedo Penna

Nadadores medalhistas olímpicos: contexto do desenvolvimento brasileiro

Expertise as a field is one that studies the authenticity of the expert, meaning the skill or knowledge level he or she has in a certain field, such as athletics. Different models, from the ambient perspective, judge factors that influence the development of the expert. The aim of this study was to verify the context in which Brazilian swimmers develop, specifically those who have won an olympic medal. Eight swimmers who have won at least one medal in any category of the Olympic games were interviewed. The transcripts of the interviews were recorded, after which a qualitative analysis using Meaning - Units (MUs). 218 MUs were classified as follows: when the athletes career began, the presence of coaches, the influence of family and friends, and deliberated practice. From the results, it can be concluded that the context of development contributed fundamentally to the evolution of the athletes. The diverse realities show that there is not a necessary pattern needed to restrict excellency.

EFEITO DA IDADE RELATIVA NO FUTSAL DE BASE DE MINAS GERAIS

The effect of relative age, understood as the advantage obtained by athletes born in the beginning of the year of selection, is a signi?cant variable for the development of talents in several modalities. Therefore, the objective is to assess the quartile of birth of athletes of the minor league categories of futsal in Minas Gerais. The sample was composed by 510 athletes enrolled in federated competitions in 2009. The chi-square test was used in this analysis. There were signi?cant differences in the distribution of the quartiles of birth in four of the ?ve categories assessed, with a predominance of the ?rst and second quartiles. In conclusion, the effect of relative age is a factor which might in?uence the choice of futsal players in the base categories.

FADIGA MENTAL NÃO ALTERA A RECUPERAÇÃO DA FREQUÊNCIA CARDÍACA, MAS AFETA O DESEMPENHO DE JOGADORES DE HANDEBOL

ABSTRACT Introduction: This study involved an analysis of the impact of mental fatigue on heart rate recovery (HRR), subjective measures of fatigue and intermittent running performance in handball players. Objective: This study was aimed at (1) examining the effects of an induced state of mental fatigue on the aerobic performance of handball players, as measured by the Yo-Yo IR1 test, and (2) exploring possible changes in heart rate regulation through HRR analysis. Methods: Twelve handball players (age: 17.50 ± 3.63 years; 5 ± 2.2 years of practice) undertook a Yo-Yo IR1 test on two occasions, separated by an interval of at least 72 hours. The Yo-Yo IR1 test was preceded by a 30-min treatment, consisting of the Stroop Color-Word Test, to induce mental fatigue. Participants in the control condition watched an emotionally neutral video. Results: Higher ratings of mental fatigue and mental effort following the Stroop Test were observed for the experimental group. No differences in motivation were observed between conditions. Moreover, the induction of mental fatigue impaired running performance and led to a higher RPE during the Yo-Yo IR1 test. Notwithstanding, no changes in HRR or blood lactate levels were observed across conditions. Conclusion: Altogether, these results suggest that mental fatigue impairs intermittent running performance, without affecting HRR values. Level of Evidence III; Case-Control study.

Influence of Autonomic Control on the Specific Intermittent Performance of Judo Athletes

Abstract Judo is a high-intensity intermittent combat sport which causes cardiac adaptations both morphologically and related to the autonomic nervous system (ANS). Therefore, this study aims to verify the correlation between heart rate variability (HRV) at rest with performance in the Special Judo Fitness Test (SJFT) and whether groups with different RR values at rest show different performance in the SJFT and during post-test recovery. Sixteen judo athletes with 7.2 ± 3.9 years of training experience participated in the study. Before and after the SJFT execution HRV and lactate measurements were conducted. For HRV analysis, we used the mean interval RR, the standard deviation of the RR interval (SDNN), the root mean square of successive differences in RR intervals (RMSSD), the low frequency (LF) and high frequency (HF) in normalized and absolute units. The sample was split into two groups (low RR and high RR) to verify if this variable could differentiate between specific performance. For the SDNN, a significant and moderate correlation (r = 0.53) was found with the total number of throws and throws in the series A (r = 0.56) and B (r = 0.54) and for the RMSSD a correlation with throws during series B (r = 0.59) in the SJFT. However, the groups did not differ in performance and recovery. Therefore, HRV is related to intermittent judo performance; however, it cannot differentiate between judokas at different levels of performance.

El efecto de la edad relative en el fútbol sala de las categorias de base de Minas Gerais

The effect of relative age, understood as the advantage obtained by athletes born in the beginning of the year of selection, is a signi?cant variable for the development of talents in several modalities. Therefore, the objective is to assess the quartile of birth of athletes of the minor league categories of futsal in Minas Gerais. The sample was composed by 510 athletes enrolled in federated competitions in 2009. The chi-square test was used in this analysis. There were signi?cant differences in the distribution of the quartiles of birth in four of the ?ve categories assessed, with a predominance of the ?rst and second quartiles. In conclusion, the effect of relative age is a factor which might in?uence the choice of futsal players in the base categories.

Relative age effect in futsal in Minas Gerais

The effect of relative age, understood as the advantage obtained by athletes born in the beginning of the year of selection, is a signi?cant variable for the development of talents in several modalities. Therefore, the objective is to assess the quartile of birth of athletes of the minor league categories of futsal in Minas Gerais. The sample was composed by 510 athletes enrolled in federated competitions in 2009. The chi-square test was used in this analysis. There were signi?cant differences in the distribution of the quartiles of birth in four of the ?ve categories assessed, with a predominance of the ?rst and second quartiles. In conclusion, the effect of relative age is a factor which might in?uence the choice of futsal players in the base categories.