C. Moreira

Objectively Measured Physical Activity and Body Mass Index in Preschool Children

Aim. To examine the association between objectively measured physical activity (PA) and body mass index (BMI) in preschool children. Methods. The study comprised 281 children (55.9% boys) aged from 4 to 6 years. PA was measured by accelerometer. Children were categorized as non-overweight (NOW) and overweight/obese (OW) according to the sex-adjusted BMI z-score (<1 and ≥1, resp.). Results. Total and moderate intensity PA were not associated with BMI. We observed that a higher proportion of OW children were classified as low-vigorous PA compared to their NOW peers (43.9 versus 32.1%, resp., P > .05). Logistic regression analysis showed that children with low-vigorous PA had higher odds ratio (OR) to be classified as OW compared to those with high-vigorous PA (OR = 4.4; 95% CI: 1.4–13.4; P = .008) after adjusting for BMI at first and second years of life and other potential confounders. Conclusion. The data suggests that vigorous PA may play a key role in the obesity development already at pre-school age.

C-reactive protein, physical activity and cardiorespiratory fitness in Portuguese adolescents: a cross-sectional study.

The goal of this study was to investigate the association of physical activity (PA) and cardiorespiratory fitness with C-reactive protein (CRP) concentration in adolescents. The sample included 386 Portuguese adolescents (n = 207, female), age 12-18 years, assessed in the year 2012. The PA was assessed with the use of accelerometers, and the cardiorespiratory fitness was assessed by the Fitnessgram Pacer test. Blood samples were collected after a 10-hour fasting, and high-sensitivity PCR concentration was further assessed. Significant associations between CRP and cardiorespiratory fitness were found for females (r = -0.313; p < 0.001) and males (r = -0.163; p < 0.05); however, when adjusted by the BMI, the associations remained significant only for females (r = -0.215; p < 0.001). Regarding the association between CRP and PA, no significant associations were found for both genders. Therefore, CRP is apparently negatively associated with cardiorespiratory fitness, with differences between males and females; for females it seems less dependent than BMI.O objetivo deste estudo foi investigar a associacao da atividade fisica (AF) e aptidao cardiorrespiratoria com os niveis de concentracao proteina C-reativa (PCR) em adolescentes. Fizeram parte da amostra 386 adolescentes Portugueses (n = 207, feminino), de 12-18 anos avaliados no ano de 2012. AF foi avaliada com acelerometros e a aptidao cardiorrespiratoria pelo teste de Vai- e-vem da bateria de testes fitnessgram. Amostras sanguineas foram obtidas apos jejum de 10 horas e posteriormente avaliaram-se os niveis de concentracao de PCR por alta sensibilidade. Foram encontradas associacoes significativas entre a PCR e a aptidao cardiorrespiratoria no genero feminino (r = -0,313; p < 0.001) e masculino (r = -0,163; p < 0,05), porem quando ajustadas pelo IMC essas associacoes permaneceram significativas apenas no genero feminino (r = -0,215; p < 0,001). Para associacoes entre PCR e AF nao se encontraram associacoes estatisticamente significativas em ambos os generos. Assim a PCR aparentemente se associa de forma negativa com a aptidao cardiorrespiratoria, mas de forma diferenciada em funcao do genero, sendo que no feminino parece menos dependente do IMC.

Proteína C-reativa, atividade física e aptidão cardiorrespiratória em adolescentes portugueses: um estudo transversal

The goal of this study was to investigate the association of physical activity (PA) and cardiorespiratory fitness with C-reactive protein (CRP) concentration in adolescents. The sample included 386 Portuguese adolescents (n = 207, female), age 12-18 years, assessed in the year 2012. The PA was assessed with the use of accelerometers, and the cardiorespiratory fitness was assessed by the Fitnessgram Pacer test. Blood samples were collected after a 10-hour fasting, and high-sensitivity PCR concentration was further assessed. Significant associations between CRP and cardiorespiratory fitness were found for females (r = -0.313; p < 0.001) and males (r = -0.163; p < 0.05); however, when adjusted by the BMI, the associations remained significant only for females (r = -0.215; p < 0.001). Regarding the association between CRP and PA, no significant associations were found for both genders. Therefore, CRP is apparently negatively associated with cardiorespiratory fitness, with differences between males and females; for females it seems less dependent than BMI.O objetivo deste estudo foi investigar a associacao da atividade fisica (AF) e aptidao cardiorrespiratoria com os niveis de concentracao proteina C-reativa (PCR) em adolescentes. Fizeram parte da amostra 386 adolescentes Portugueses (n = 207, feminino), de 12-18 anos avaliados no ano de 2012. AF foi avaliada com acelerometros e a aptidao cardiorrespiratoria pelo teste de Vai- e-vem da bateria de testes fitnessgram. Amostras sanguineas foram obtidas apos jejum de 10 horas e posteriormente avaliaram-se os niveis de concentracao de PCR por alta sensibilidade. Foram encontradas associacoes significativas entre a PCR e a aptidao cardiorrespiratoria no genero feminino (r = -0,313; p < 0.001) e masculino (r = -0,163; p < 0,05), porem quando ajustadas pelo IMC essas associacoes permaneceram significativas apenas no genero feminino (r = -0,215; p < 0,001). Para associacoes entre PCR e AF nao se encontraram associacoes estatisticamente significativas em ambos os generos. Assim a PCR aparentemente se associa de forma negativa com a aptidao cardiorrespiratoria, mas de forma diferenciada em funcao do genero, sendo que no feminino parece menos dependente do IMC.

Proteína C-reactiva, actividad física y la aptitud cardiorrespiratoria en adolescentes portugueses: un estudio transversal

The goal of this study was to investigate the association of physical activity (PA) and cardiorespiratory fitness with C-reactive protein (CRP) concentration in adolescents. The sample included 386 Portuguese adolescents (n = 207, female), age 12-18 years, assessed in the year 2012. The PA was assessed with the use of accelerometers, and the cardiorespiratory fitness was assessed by the Fitnessgram Pacer test. Blood samples were collected after a 10-hour fasting, and high-sensitivity PCR concentration was further assessed. Significant associations between CRP and cardiorespiratory fitness were found for females (r = -0.313; p < 0.001) and males (r = -0.163; p < 0.05); however, when adjusted by the BMI, the associations remained significant only for females (r = -0.215; p < 0.001). Regarding the association between CRP and PA, no significant associations were found for both genders. Therefore, CRP is apparently negatively associated with cardiorespiratory fitness, with differences between males and females; for females it seems less dependent than BMI.O objetivo deste estudo foi investigar a associacao da atividade fisica (AF) e aptidao cardiorrespiratoria com os niveis de concentracao proteina C-reativa (PCR) em adolescentes. Fizeram parte da amostra 386 adolescentes Portugueses (n = 207, feminino), de 12-18 anos avaliados no ano de 2012. AF foi avaliada com acelerometros e a aptidao cardiorrespiratoria pelo teste de Vai- e-vem da bateria de testes fitnessgram. Amostras sanguineas foram obtidas apos jejum de 10 horas e posteriormente avaliaram-se os niveis de concentracao de PCR por alta sensibilidade. Foram encontradas associacoes significativas entre a PCR e a aptidao cardiorrespiratoria no genero feminino (r = -0,313; p < 0.001) e masculino (r = -0,163; p < 0,05), porem quando ajustadas pelo IMC essas associacoes permaneceram significativas apenas no genero feminino (r = -0,215; p < 0,001). Para associacoes entre PCR e AF nao se encontraram associacoes estatisticamente significativas em ambos os generos. Assim a PCR aparentemente se associa de forma negativa com a aptidao cardiorrespiratoria, mas de forma diferenciada em funcao do genero, sendo que no feminino parece menos dependente do IMC.