Scielo RSS <![CDATA[Motriz: Revista de Educação Física]]> http://www.scielo.br/rss.php?pid=1980-657420180002&lang=pt vol. 24 num. 2 lang. pt <![CDATA[SciELO Logo]]> http://www.scielo.br/img/en/fbpelogp.gif http://www.scielo.br <![CDATA[Dematerializing physical education in public schools: an indication of permanence]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1980-65742018000200301&lng=pt&nrm=iso&tlng=pt Abstract AIMS The objective of this study was to identify and analyze the most recurrent difficulties reported by Physical Education teachers of state and municipalized schools of the state of São Paulo, Brazil. METHODS The sample involved 13 cities (12 - Mogi-Mirim Region and 1 - São Paulo city), totaling 73 Physical Education teachers. Its research used a descriptive and exploratory methods and a questionnaire by instrument. The answers were analyzed using content analysis (Bardin, 2011). RESULTS As a result, the most reported difficulty, from both samples, was the lack, in quantity and in quality, of materials. Other difficulties were reported, like: inadequate physical space, indiscipline and demotivation of students. CONCLUSION We conclude that the material problem is a permanent difficulty in this discipline at school. <![CDATA[Translation and validation of the perceived locus of causality questionnaire (PLOCQ) in a sample of portuguese physical education students]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1980-65742018000200302&lng=pt&nrm=iso&tlng=pt Abstract AIM This study main aim was to translate and validate one of the most used SDT-based instruments to assess motivation in PE classes, the Perceived Locus of Causality Questionnaire (PLOCQ), to the Portuguese context. METHOD Sample was composed of 652 boys (M=15.4 years; SD=1.90) and 702 girls (M=15.47 years; SD=1.95), enrolled in physical education classes in several Portuguese schools. RESULTS The analysis provided support for a five factors and 18 items model, after excluding two items (χ² = 491.473, df = 125, p = &lt;.001, SRMR = .062, NNFI = .908, CFI = .924, RMSEA = .067, 90% CI .061-.073). Sample and gender invariance procedures were made to ensure proper psychometric validation. Results presented support for the model in both gender and calibration/validation samples. CONCLUSION This study suggests that PLOCQ with five factors and 18 items has good psychometric proprieties and can be used to assess contextual motivation towards PE in the Portuguese context. <![CDATA[The importance of history, language, change and challenge: What Vygotsky can teach sports coaches]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1980-65742018000200303&lng=pt&nrm=iso&tlng=pt Abstract AIMS In recent years, recognition of the pedagogical nature of coaching has gained increasing traction. However, within this line of inquiry, only limited attention has been given to the work of Lev Vygotsky. The aim of this article is to construct a more comprehensive case about how Vygotsky’s principal ideas can aid our understanding of both the act and process of sports coaching. METHODS The method involves constructing a case from Vygotsky’s original work, and how it has been interpreted by others, related to the applicability of using some of his concepts to further our understanding of sports coaching practice. The case presented represents an interpretive and considered approach to the question and task at hand. DISCUSSION The discussion is centred on the utility of Vygotsky’s theorising to sports coaching practice. In particular his advocacy of (1) the cultural-historical perspective; (2) the claim of language as the greatest mediator in learning; (3) how perezhivane contributes to such knowledge generation; (4) the zone of proximal development and the role of the ‘more capable other’ within it; and (5) the dialectical approach, focussing on the dynamic relationship between everyday and scientific concepts, are given primacy. CONCLUSION Finally, a reflective conclusion summarises the main points made and suggests possible future courses of action. <![CDATA[Socio-demographic factors influences on guardians’ perception of Developmental Coordination Disorder among Brazilian schoolchildren]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1980-65742018000200304&lng=pt&nrm=iso&tlng=pt Abstract AIM The objective of this study was to identify socio-demographic factors that are associated with the guardians’ perception of developmental coordination disorder among schoolchildren from seven to ten years old. METHODS The parents/guardians of 361 children completed the Developmental Coordination Disorder Questionnaire (DCDQ) and a socio-demographic questionnaire in this cross-sectional study. The univariate relationship between the DCDQ and socio-demographic factors was tested by the chi-square test. The odds ratio (OR) with 95% confidence interval was calculated. Socio-demographic variables with p≤0.20 were included in the logistic regression analysis. RESULTS The child's age (B = 0.40; OR = 1.49; p &lt;0.01) and the guardian undergoing treatment for illness (B = 0.97; OR = 2.65; p = 0.02) were retained in the final regression model. CONCLUSION Thus, increasing children’s’ age and guardians undergoing treatment for illness increased the guardians’perception of developmental coordination disorder. <![CDATA[Acute melatonin administration enhances aerobic tolerance: an analysis of biochemical and hematological parameters]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1980-65742018000200305&lng=pt&nrm=iso&tlng=pt Abstract Aims This study is aimed at testing the acute melatonin administration (oral; 6 mg) on aerobic tolerance at cycloergometer and analyzing the consequences on biochemical and hematological parameters. Methods The maximal aerobic capacity intensity (iMAC) at cycloergometer of eleven male healthy men (24.18±3.92 years-old; 87.07±12.48 kg; 1.82±0.05 m; 26.18±3.63 kg/m2; and 16.28±5.77 % of fat) was individually determined and used to perform a time to exhaustion (tlim) trial of 30 minutes after melatonin or placebo administration. We observed 48-72h interval between tests, performed in a double-blind experiment design. In order to determine hematological and biochemical parameters we collected venous blood samples before and after tlim. Statistical significance was set at 5%. Results The intensity and the lactatemia corresponding to the maximal aerobic capacity were 120.88±18.78 W and 3.32±1.03 mmol.L-1, respectively. The tlim with placebo (33.94±15.26 min, confidence interval = 24.92 - 42.95) was significantly lower than the tlim with melatonin (41.94±17.22 min; CI = 31.76 - 52.12; p = 0.03; 19.06%; effect size = 0.49). All of the 21 analyzed blood physiological variables resulted in no significant variation after tlim when placebo was compared to melatonin, except for total sera cholesterol (lower after exercise with melatonin). Conclusion Acute melatonin administration enhanced aerobic tolerance at iMAC in 19% at cycloergometer; however, the biochemical and hematological variables assessed were not significantly modulated. <![CDATA[Erratum: Impacts of low or vigorous levels of physical activity on body composition, hemodynamics and autonomic modulation in Down syndrome subjects]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1980-65742018000200901&lng=pt&nrm=iso&tlng=pt Abstract Aims This study is aimed at testing the acute melatonin administration (oral; 6 mg) on aerobic tolerance at cycloergometer and analyzing the consequences on biochemical and hematological parameters. Methods The maximal aerobic capacity intensity (iMAC) at cycloergometer of eleven male healthy men (24.18±3.92 years-old; 87.07±12.48 kg; 1.82±0.05 m; 26.18±3.63 kg/m2; and 16.28±5.77 % of fat) was individually determined and used to perform a time to exhaustion (tlim) trial of 30 minutes after melatonin or placebo administration. We observed 48-72h interval between tests, performed in a double-blind experiment design. In order to determine hematological and biochemical parameters we collected venous blood samples before and after tlim. Statistical significance was set at 5%. Results The intensity and the lactatemia corresponding to the maximal aerobic capacity were 120.88±18.78 W and 3.32±1.03 mmol.L-1, respectively. The tlim with placebo (33.94±15.26 min, confidence interval = 24.92 - 42.95) was significantly lower than the tlim with melatonin (41.94±17.22 min; CI = 31.76 - 52.12; p = 0.03; 19.06%; effect size = 0.49). All of the 21 analyzed blood physiological variables resulted in no significant variation after tlim when placebo was compared to melatonin, except for total sera cholesterol (lower after exercise with melatonin). Conclusion Acute melatonin administration enhanced aerobic tolerance at iMAC in 19% at cycloergometer; however, the biochemical and hematological variables assessed were not significantly modulated.