Abstract The present study examines sex differences regarding children’s self-perceptions and motor competence (locomotor and object control subtests), parents’ perceptions about their boys’ and girls’ competence, and the associations among these variables. Parents and their children (N= 77; M= 8.70, SD= 2.13) participated in the study. The children’s motor competence was assessed using the Test of Gross Motor Development — Second Edition (TGMD-2). The children’s self-perceptions were assessed using the Pictorial Scale of Perceived Competence and Social Acceptance and the Self-Perception Profile for Children, depending on the child’s age. The parental perception of their children’s motor competence was assessed using an adapted version of the children’s perceptions of motor competence. Boys and girls were similar regarding the locomotor subtest; boys showed significantly higher scores for the object control subtest than girls. Parents’ perceptions of children’s motor competence were significantly related to the children´s motor competence and were the stronger predictor in the locomotor model and the second predictor in the object control subtest model; sex was the stronger predictor for the object control subtest. Our findings address new information regarding children’s motor and parents’ motor competence.

Abstract Aim: The present study aimed to analyze if the exergaming exercise produces the same acute effects as conventional training. Methods: The Nintendo® Wii was chosen as the stimulus for this study. Participants should conduct a physical training session under Exergames Training (ET) and Conventional Training (CT). Both training conditions use two aerobic exercises and six strength exercises, which were always performed in the same sequence. The study group was composed of 30 young adults (16 men and 14 women, mean age of 23.7 ± 3.7 years). Results: Our findings showed significant results between pre and post-tests: the heart rate (HR) and the double product (DP) were higher in the post-exercise period, while the systolic blood pressure (SBP) was lower. Further analysis revealed that ET and CT conditions had no significant differences. ET condition showed to present similar results as CT condition to women (regarding HR, diastolic blood pressure - DBP, and DP), and to men (HR, SBP, and DBP). Conclusion: The present research showed that exergaming provides the same acute effects in physiological variables as conventional exercises. Thus, this kind of exercise can be a reliable way to improve the lifestyle of young adults.

Abstract Aim: This study aimed to compare the MC levels of Brazilian and Portuguese schoolchildren from 4 to 11 years. Methods: One hundred and forty-eight Brazilian children were evaluated using the Motor Competence Assessment (MCA) instrument and were later compared to the existent normative values of Portuguese children for a similar age range. Results: Our findings showed that MC increased with age, and boys outperformed girls, especially in the older age group. The distribution of the Brazilian children showed that while Brazilian boys perform above Portuguese normative values in 4 of the 6 tasks of the MCA, Brazilian girls perform below those values in all tasks, except for the standing long jump. Conclusion: The differences found, especially in girls, may be related to differences in the Physical Education curricula and how school recess periods are used.

Resumo Introdução: A Esclerose Múltipla (EM) é uma doença inflamatório crônica caracterizada pela infiltração de células inflamatórias no Sistema Nervoso Central (SNC). Há evidencias de que danos cumulativos ao DNA possam contribuir para vários mecanismos subjacentes às lesões da EM. As alterações no equilíbrio postural são observações frequentes nos sujeitos com EM. Objetivo: Este estudo avaliou os índices de dano ao DNA (ID) e equilíbrio postural em portadores de Esclerose Múltipla (EM). Métodos: Um estudo de caso-controle foi conduzido com 28 sujeitos pareados por sexo, idade e índice de massa corporal, divididos em grupo EM e controle. O ID foi avaliado pelo ensaio cometa e o equilibro postural através do registro das oscilações corporais relativas ao deslocamento centro de pressão (COP) nas direções antero posterior e médio lateral. Resultados: Maiores ID em portadores de EM (21,3 ± 4,8) do que controles (7,9 ± 6,1). Diferenças significativas entre os grupos também foram percebidas nos parâmetros do controle postural. As maiores amplitudes de oscilação foram observadas no grupo EM para ambas as direções. As associações entre o ID e parâmetros do controle postural apresentaram correlações fracas e significativas. Não foram encontradas associações entre ID e tempo de diagnóstico de EM. Conclusão: Portadores de EM apresentaram maior ID e maiores oscilações corporais do que controles saudáveis.

Abstract Introduction: Multiple Sclerosis (MS) is a chronic inflammatory disease characterized by infiltration of inflammatory cells on the Central Nervous System (CNS). There is evidence that cumulative DNA damage can contribute to various mechanisms underlying MS lesions. Changes in postural balance are frequent observations in subjects with MS. Objective: Evaluated the DNA damage index (DDI)) and postural balance in patients with MS. Methods: A case-control study was conducted with 28 subjects matched for sex, age, and body mass index, divided into MS group and control. The DDI was assessed by comet assay and postural balance through recording the body oscillations of the center of pressure (COP), in the anterior-posterior and lateral middle directions. Results: Showed higher DDI in MS patients (21.3 ± 4.8) than controls (7.9 ± 6.1). Significant differences between groups were also noted in postural control parameters. The wider ranges of postural sway were observed in the MS group. The associations between DDI and postural control parameters showed weak, but significant correlations. No associations were found between DDI and time of diagnosis of MS. Conclusion: People with MS had higher DDI and larger body oscillations than healthy individuals.

RESUMO O estudo investigou a influência do foco de atenção na aprendizagem de crianças, em uma tarefa de equilíbrio dinâmico. Setenta e quatro crianças (38 meninas e 36 meninos) com média de idade de 8,03 anos participaram do estudo. A tarefa consistia no deslocamento do Pedalo(r) em um percurso de 7 metros, sem apoios. Os participantes foram divididos em três grupos, para cada sexo, em relação a instrução: Foco Externo Próximo (FP); Foco Externo Distante (FD); Controle (C). Os resultados mostraram que na aquisição, os meninos desempenharam melhor a tarefa (p=0,022). Nas fases de transferências, apenas a fase T2 apresentou diferença significativa (p=0,014), com desempenho melhor dos meninos e, em relação ao foco de atenção, o foco externo distante mostrou-se superior do que o grupo controle, em ambas as fases de transferência (p=0,034; p=0,018). Conclui-se que direcionar a atenção a certa distância do corpo, os meninos potencializam sua aprendizagem.

ABSTRACT The aim of this study was to investigate the influence of focus of attention in learning of boys and girls, in a balance task. Seventy-four children (38 girls and 36 boys) with a mean age of 8,03 years participated in the study. The task involved participants to ride a Pedalo, without support. The participants were divided in six groups, three for each sex, in relation to the instruction: Proximal External Focus (FP); Distal External Focus (FD); Control (C). The results showed that, in acquisition phase, boys outperformed girls (p=0,022). In transfers tests, only T2 showed a significant difference (p=0,014), with better performance of boys and, for the focus of attention, the distant external focus was higher than the control group in both transfers tests (p=0,034; p=0,018). Thus, directing the focus of attention externally, at a greater distance from the body, can enhance learning of boys.