Effects of educational sessions on school backpack use among elementary school students

OBJETIVO: Avaliar a modificação na quantidade de carga transportada, o modelo e o modo de transportar mochilas escolares após sessões educativas. MÉTODOS: Estudo de uma série de casos, com 99 crianças de sete a 11 anos do ensino fundamental, em escola particular da cidade São Paulo, São Paulo. Foram avaliadas a massa corporal (kg) e estatura dos alunos (cm), quantidade de carga transportada nas mochilas (kg). Os modelos e os modos de transporte das mochilas foram avaliados por filmagem pré e pós-intervenção. Como medida de intervenção, os sujeitos (crianças, pais e professores) foram submetidos a uma sessão educativa, que consistiu de orientações teóricas sobre coluna vertebral e transporte de carga. Para os escolares foi adicionada orientação prática das posturas corretas no transporte de carga. Os escolares receberam um reforço prático mensal por três meses. Pais e professores receberam reforço em folheto informativo e orientações na homepage da escola. Os dados foram analisados pelos testes estatísticos de igualdade de duas proporções e Wilcoxon. O nível de significância adotado foi 5%. RESULTADOS: O modelo de mochila modificou para duas alças de 46,5% para 60,6% (p=0,046), modo de transporte para ombro bilateral de 41,4% para 55,6% (p=0,047). A carga transportada nas mochilas diminuiu 2,66kg (p<0,001) e a relação massa corporal do sujeito e carga transportada nas mochilas diminuiu 7%. Na modificação por categorias, o número de alunos do grupo inadequado (carga transportada>15% da massa corporal do aluno) diminuiu (p<0,001). CONCLUSÕES: As sessões educativas promoveram mudanças na utilização de mochilas, revelando adesão satisfatória ao modelo de intervenção proposto entre os escolares e o importante papel da Fisioterapia na saúde escolar.OBJECTIVE: To evaluate the changes in loads carried, in the model of backpack used and in the way of carrying school backpacks after the implementation of an educational program. METHODS: This study was performed on 99 children aged seven to 11 years at elementary school level in a private school in São Paulo, São Paulo, Brazil. The subjects' body mass (kg) and height (cm) and the loads carried in their backpacks (kg) were evaluated. The backpack models and the ways of carrying them were evaluated by filming before and after the intervention. The intervention program consisted of educational sessions offered to the children, parents and teachers. The sessions involved lectures about the spine and about the principles of load carrying. The children also received practical guidance relating to correct postures for load carrying. The children received monthly practical reinforcement for three months. The parents and teachers received reinforcement by means of information flyers and guidance on the school's home page. The data were analyzed by means of two-proportion equality and Wilcoxon statistical tests. The significance level was considered as &#945;=0.05. RESULTS: The use of a two-strap backpack model increased from 46.5% to 60.6% (p=0.046) and carrying it on two shoulders increased from 41.4% to 55.6% (p=0.047). The load carried in the backpacks decreased by 2.66kg (p<0.001) and the ratio between the subject's body mass and the load carried in the backpacks decreased by 7%. With regard to change per category, the number of subjects in the inappropriate group (load carried>15% of the subject's body mass) decreased (p<0.001). CONCLUSIONS: The educational sessions promoted changes in backpack use and it was observed a satisfactory adherence to the intervention program proposed. These results demonstrate the importance of Physical Therapy educational programs in schoolchildren's health

The steel–concrete interface

Although the steel–concrete interface (SCI) is widely recognized to influence the durability of reinforced concrete, a systematic overview and detailed documentation of the various aspects of the SCI are lacking. In this paper, we compiled a comprehensive list of possible local characteristics at the SCI and reviewed available information regarding their properties as well as their occurrence in engineering structures and in the laboratory. Given the complexity of the SCI, we suggested a systematic approach to describe it in terms of local characteristics and their physical and chemical properties. It was found that the SCI exhibits significant spatial inhomogeneity along and around as well as perpendicular to the reinforcing steel. The SCI can differ strongly between different engineering structures and also between different members within a structure; particular differences are expected between structures built before and after the 1970/1980s. A single SCI representing all on-site conditions does not exist. Additionally, SCIs in common laboratory-made specimens exhibit significant differences compared to engineering structures. Thus, results from laboratory studies and from practical experience should be applied to engineering structures with caution. Finally, recommendations for further research are made

Qualitative postural analysis among boys and girls of seven to ten years of age Análise postural qualitativa entre meninos e meninas de sete a dez anos de idade

BACKGROUND: Postural abnormalities are often found in children. At this stage of life, posture undergoes many adjustments and adaptations due to body changes. Objective: To qualitatively identify the postural abnormalities which occur most frequently among children aged OBJECTIVE: Reven and ten years, comparing boys and girls, and to evaluate these subjects' lumbar flexibility. METHODS: One hundred and ninety-one children were photographed in the sagittal and frontal planes. The variables analyzed were: ankle (valgus and varus), tibiotarsal angle (opened and closed), knee (hyperextension and semiflexion, valgus and varus), pelvis (anteversion and retroversion; lateral pelvic inclination), trunk (antepulsion and retropulsion), lumbar spine (hyperlordosis and rectification), thoracic spine (hyperkyphosis and rectification), cervical spine (hyperlordosis and rectification), scoliosis, shoulder (imbalance and protraction), scapula (winged, abducted and adducted) and head (tilt and protraction). The lumbar flexibility was assessed using Schöber's index. RESULTS: The boys had greater incidence of winged scapula, shoulder imbalance, protraction of shoulders and head and cervical hyperlordosis than the girls did. Conversely, the girls had greater incidence of head tilt and larger Schöber index values. CONCLUSIONS: There were abnormalities in children's postural development that are probably related to muscle, skeletal and flexibility differences between the genders. These differences may influence each child's postural pattern during growth.<br>CONTEXTUALIZAÇÃO: Alterações posturais são freqüentemente encontradas em crianças. Nessa fase, a postura sofre uma série de ajustes e adaptações às mudanças no próprio corpo. OBJETIVO: Identificar, de maneira qualitativa, quais as alterações posturais mais freqüentes em crianças entre sete e dez anos, comparando meninos e meninas, e avaliar a flexibilidade lombar desses sujeitos. MATERIAIS E MÉTODOS: Cento e noventa e uma crianças foram fotografadas nos planos frontal e sagital. As variáveis analisadas foram: tornozelo (valgo e varo), ângulo tíbio-társico (aberto e fechado), joelho (hiperextensão e semiflexão, valgo e varo), pelve (anteversão e retroversão, inclinação pélvica lateral), tronco (antepulsão e retropulsão), lombar (hiperlordose e retificação), torácica (hipercifose e retificação), cervical (hiperlordose e retificação), escoliose, ombro (desnível e protração), escápula (alada, abduzida e aduzida) e cabeça (inclinada e protraída). A flexibilidade da coluna lombar foi avaliada pelo índice de Schöber. RESULTADOS: Os meninos mostraram maior incidência de escápula alada, desnível de ombros, protração de ombros e cabeça e hiperlordose cervical do que as meninas. Por sua vez, as meninas apresentaram maior incidência de inclinação de cabeça e maior valor para o índice de Schöber. CONCLUSÕES: Existem alterações no desenvolvimento postural das crianças que podem estar relacionadas a diferenças, entre os sexos, no sistema muscular, esquelético e na flexibilidade. Estas diferenças podem influenciar o padrão postural do indivíduo durante o crescimento

Psychometric properties of the Mental Health Continuum-Short Form : A study of portuguese speaking children/youths

The development of measures of children and adolescents’ subjective well-being is crucial to the conceptualization and evaluation of positive mental health. The aim of this study was to investigate the factorial structure and invariance of the Mental Health ContinuumShort Form (MHC-SF—adolescents) across children and youths. Participants were from two different samples: 208 elementary school children (sample 1) and 216 middle school youths (sample 2). Results confirmed the three-dimensional structure of subjective well-being in both samples. The three sub-scales of the MHCSF yielded high internal consistency and results from the HTMT85 indicated discriminant validity. Measurement invariance testing across three different age groups (7–8, 9–10 and 11–14 years) confirmed the full metric and approximate scalar invariance of the MHC-SF. Full scalar invariance was achieved across gender. The study also compared the latent means for mental well-being in the three age groups, and found that the younger groups showed significantly higher levels of wellbeing. The present research study strongly suggests that the MHC-SF (adolescents) is an appropriate instrument to measure the positive mental health and well-being of children and pre-adolescents as multidimensional construct