BackgroundPrevious studies speculated that the Incremental Shuttle Walking Test (ISWT) is a maximal test in children and adolescents, however comparison between ISWT with cardiopulmonary exercise test has not yet performed. Furthermore, there is no regression equation available in the current literature to predict oxygen peak consumption (VO2 peak) in this population. This study aimed to assesses and correlate the cardiorespiratory responses of the ISWT with the cardiopulmonary exercise (CEPT) and to develop and validate a regression equation to predict VO2 peak in healthy sedentary adolescent boys.MethodsForty-one participants were included in the study. In the first stage, the VO2 peak, respiratory exchange ratio (R peak), heart rate max (HR max) and percentage of predicted HR max (% predicted HR max) were evaluated in CEPT and ISWT (n = 26). Second, an equation was developed (n = 29) to predict VO2 peak. In both phases, the VO2 peak, respiratory exchange ratio R and hearth rate (HR) were evaluated. In the third stage, the validation equation was performed by another 12 participants.ResultsSimilar results in VO2 peak (P>0.05), R peak (P>0.05) and predicted maximum HR (P>0.05) were obtained between the ISWT and CEPT. Both tests showed moderate significant correlations of VO2 peak (r = 0.44, P = 0.002) e R peak (r = -0.53, P < 0.01), as well as the agreement of these measurements by Bland-Altman analysis (VO2 peak, bias = -0.13; R peak, bias = 0.0). Distance walked was the variable that explained 42.5% (R2 = 0.425, p = 0.0001) of the variance in VO2 peak. The equation was VO2 peak (predicted) = 20.94 + (0.02 x distance walked). The results obtained by the equation were not significantly different compared to the values obtained by the gas analyzer and the Bland-Altman analysis showed agreement (bias = 1.6).ConclusionThe ISWT produced maximal cardiorespiratory responses comparable to the CEPT, and the developed equation showed viability for the prediction of VO2 peak in healthy sedentary adolescent boys.

Introduction:In the child's first year of life, motor development is critical for the other areas of child development. Beliefs and parenting practices influence the parents' care and encouragement of their children, reflecting in their motor development; however, the Brazilian literature on this subject is scarce. Objective: to characterize the parental practices and beliefs associated with motor development in the first year of life; and to verify if practices and beliefs are interrelated. Methods: Two questionnaires were developed and applied, one about parenting practices and the other about parental beliefs on motor development in the first year life, to 27 caregivers of children between 12 and 24 months of age, who participated in an aquatic stimulation program. The agreement between practices and beliefs was verified by a graphical method, based on the transformation of ordinal scores to an interval scale using Rasch analysis. Results: The participants had higher levels of education and economic status. They reported a variety of practices focused on the motor development of their children, such as family interaction through playing, toy offers, lap time and free movement space. Conclusion: Most of the practices were based on parental beliefs, for some activities, however, beliefs and practices diverged, demonstrating the complexity inherent to the formation of parental beliefs.

INTRODUÇÃO: Os pais são responsáveis por organizar uma variedade de experiências dentro de casa e na comunidade, que favorecem o desenvolvimento infantil. Embora seja importante e amplamente estudado nos diferentes domínios do desenvolvimento, existem poucos estudos sobre a relação entre práticas parentais e o desenvolvimento motor. OBJETIVO: Verificar quais práticas parentais estão mais relacionadas com o desenvolvimento motor no primeiro ano de vida. MÉTODOS: Estudo transversal, exploratório, metodologia Apoio Multicritério à Decisão e Correlação de Spearman. Foram aplicados questionários estruturados sobre práticas parentais e marcos do desenvolvimento motor no primeiro ano de vida em 35 pais ou cuidadores de crianças com idade entre 12 a 24 meses. RESULTADOS: Verificou-se que de quatro a seis meses as práticas de não deixar no berço, colocar de pé com apoio, colocar no chão, dar brinquedos variados, apresentaram correlação moderada e inversa com quatro apoios (r= -0,440 p= 0,010), engatinhar (r= -0,418 p= 0,013) e passos (r= -0,397 p= 0,018). Entre seis a doze meses as práticas de não deixar no berço, colocar de pé com apoio, estimular passos, apresentaram correlação moderada e inversa com sentar-se (r= -0,368 p=0,030), sentar-se bem (r= -0,388 p= 0,021), em pé (r=-0,407 p= 0,015) e passos (r= -0,373 p= 0,027). CONCLUSÃO: Foi possível verificar que há relação entre as práticas parentais e o surgimento dos marcos do desenvolvimento motor no primeiro ano de vida, a partir de 4 meses de idade. Aquelas práticas relacionadas com a oferta de material para aprendizagem e liberdade de movimento foram as mais favoráveis.

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