Browsing by Author "Nhantumbo, Leonardo"
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- A cross cultural comparison of sedentary behavior of african and european youthPublication . Prista, António; Lopes, Vitor P.; Saranga, Sílvio; Nhantumbo, Leonardo; Santos, F.; Maia, José A.R.The study of sedentary behavior in rural Africa children and adolescents is scarce, and the goal of this research was to compare the sedentary behavior and light physical activities (LPA) between a rural sample from Mozambican school aged youth (6 to 16 years old) with their European peers, namely from Portugal. Methods: The sample comprises 146 Mozambican (MZ) and 195 Portuguese (PT) youth of both gender, and was split in 3 age groups (6–8yrs; 9–11yrs; 12–16yrs). The Actigraph model 7164 was used to obtain information marking daily PA and sedentary behaviours during 7 consecutive days in PT, and 1 only day in MZ (due to operational and logistic problems). Data files from all participants were screened by detecting blocks of consecutive zeros. Periods with 60 minutes of consecutive zeros were detected and flagged as times in which the monitor was not worn. Participants had to have at least 10 hours of data to count as a valid day. After complete screening, the raw activity “counts” were processed for time spent in the different PA intensities computations. Sedentary behavior was defined as PA with energy expenditure at the level of 1.0–1.5 metabolic equivalent units (METs). LPA was defined as PA with energy expenditure at the level of 1.6–2.9 METs. Puyau regression equation was used to determine the cut-points for PA intensities. Sedentary behavior was identified using a cut-point of <670 counts.min-1, and LPA using a cut-point of >670 and <3003 counts.min-1 Results: Mozambican rural school aged sample showed, at all age-groups and gender, an accentuated lower time spent in daily sedentary activities with a magnitude of difference around 1.5 higher for PT (Boys: MZ=370.9±78.2 vs PT=590.8±81.9; Girls: MZ=389.4±90.5 vs PT=596.2±86.2; F=493.7; p=0.0000). Using country, age and sex as factors, no statistically significant interactions were found. By turn, time spent in light activities were higher in MZ (Boys: MZ=197.5±47.9 vs PT=157.9±42.7; Girls: MZ=211.8±56.0 vs PT=158.9±47.7; F=66.7; p<0.001) in a magnitude of 1.3 higher for MZ. No significant interactions (p>0.05) were observed. Conclusions: Based on simultaneous observational studies, a significant higher time spent in light activities and less in sedentary behavior from the MZ rural school aged population may to be related to survival households activities, long distance walks and outdoor games still present in African rural areas.
- Do problema, do desenho e dos métodos. Variabilidade biológica humana em Moçambique: a visão, as pessoas e a estrutura de um projecto nacional de impacto internacionalPublication . Prista, António; Nhantumbo, Leonardo; Damasceno, Albertino; Jani, Ilesh; Samugudo, Eduardo; Maia, José A.R.; Freitas, Duarte L.; Rocha, Jorge; Seabra, André; Lopes, Vitor P.; Beunen, Gaston P.; Williams-Blangero, Sarah; Conn, CarolineO estudo de Calanga a que refere o presente livro está enquadrado num projecto multididciplinar de pesquisa intitulado Variabilidade biológica humana em Moçambique: implicações para a educação física, desporto, medicina preventiva e saúde pública (VBH). Este projecto pretende ser uma continuidade de uma linha de pesquisa na área da saúde, crescimento e desenvolvimento em populações Moçambicanas, a qual teve início em 1990 e que deu origem a múltiplas publicações científicas sob a forma de livros, artigos, comunicações e teses. O estudo constitui-se numa abordagem multivariada que cruza informação proveniente da biologia humana, da auxologia, da genética, da antropologia física, da epidemiologia e das ciências da actividade física numa proposta de visão que reclama um olhar integrado e integrador, e que possibilite um esclarecimento sólido acerca do estado de saúde individual e populacional, do estilo de vida e bem-estar.
- Níveis e padrões de actividade física de crianças e jovens de Calanga: da simples descrição à sua relevância em termos funcionaisPublication . Lopes, Vitor P.; Prista, António; Nhantumbo, Leonardo; Saranga, Sílvio; Seabra, André; Vinagre, João; Conn, Caroline; Beunen, Gaston P.; Maia, José A.R.A actividade física habitual (AF) é um comportamento associado ao estado de saúde dos sujeitos de qualquer idade. Os níveis de AF das populações de países africanos num estado de transição económica são pouco conhecidos. O propósito central deste capítulo foi o estudar de níveis de AF de crianças e adolescentes de uma comunidade rural de Moçambique (Calanga). A AF física foi avaliada recorrendo ao monitor de AF Actigraph modelo 7164 e a um questionário com questões acerca do modo e frequência de AF.
- Physical activity assessed by accelerometry in rural African school-aged children and adolescentsPublication . Prista, António; Nhantumbo, Leonardo; Saranga, Sílvio; Lopes, Vitor P.; Maia, José A.R.; Seabra, André; Vinagre, João; Conn, Caroline; Beunen, Gaston P.Physical activity (PA) in children/adolescents of both genders from a rural community in Mozambique was estimated by accelerometry and by questionnaire and was compared with PA of Portuguese youth. Total PA, moderate (MPA), vigorous (VPA) and very vigorous (VVPA) were evaluated. Mozambican boys were more active than girls. Intensity of PA declined significantly with age. Survival activities, such as household tasks, were the predominant mode of PA. Compared with Portuguese children/adolescents, Mozambicans had significantly higher total PA; showed less decline of PA with age and engaged in fewer minutes at higher intensity PA. Environmental factors likely explain documented differences.
- Physical Activity in Rural African School-Aged Children and AdolescentsPublication . Prista, António; Lopes, Vitor P.; Maia, José A.R.; Seabra, André; Nhantumbo, Leonardo; Saranga, Sílvio; Conn, Caroline; Beunen, Gaston P.In industrialized countries, reduced levels of physical activity (PA) associated with increased prevalence of the so-called “hypokinetic diseases” stimulates the interest in research in PA and its correlates