Aptidão cardiorrespiratória e nível de atividade física em adolescentes

Abstract

-More objective methods to detect inactive adolescents may help identify young people that are vulnerable to obesity and other chronic diseases. The objective of this study was to examine the association between classifications obtained with the cardiorespiratory fitness test and physical activity level in adolescents, as well as the agreement between tertiles and z-score distribution of the variables generated with these methods (distance covered and total physical activity score). A cross-sectional study was conducted using a random sample of 639 adolescents (61% girls) aged 12 to 19 years (mean age of 16 ± 1.8 and categorized into two age groups: 12-13 and 14-19 years), from public schools in Niterói, Rio de Janeiro, Brazil. Cardiorespiratory fitness was assessed by a 9-min run/walk test (T9) and physical activity level by the International Physical Activity Questionnaire (IPAQ). The chi-square test (or Fisher's exact test) and Kruskal-Wallis test were applied for the evaluation of associations, and the weighted kappa coefficient and intraclass correlation coefficient were used to investigate agreement between variables. A level of significance of p<0.05 was adopted. A significant association between the classifications obtained with the two methods was only observed for adolescents aged ≥ 14 years. However, there was agreement between the variables generated with the two methods in both age groups. The median distance covered in the T9 increased according to tertiles of total physical activity score. An association between the classifications obtained with the IPAQ and T9 was only found for older adolescents. However, the continuous variables and variables categorized into tertiles generated with the methods were associated and showed agreement in both age groups. Key words: Adolescents; Fitness; Motor activity. Resumo -Métodos mais objetivos para identificar adolescentes inativos podem auxiliar na identificação de jovens vulneráveis à obesidade e outras doenças crônicas. O objetivo do estudo foi examinar a associação entre as classificações obtidas pelo teste de aptidão cardiorrespiratória e o nível de atividade física, bem como a concordância entre os tercis e a distribuição em z escore das variáveis geradas a partir destes métodos (metros percorridos

Association between eating habits, body mass index, cardiorespiratory fitness, and cardiometabolic risk factors in children

“…When overweight/obese children are compared with children with adequate weights, such influence of the CRF does not hold. [6,18,20]. Some authors also suggest that better CRF levels might constrict the hazards of a profile with metabolic risks, as obese and overweight children who have better CRF levels were found to have lower risks in that sense [20,22].…”

“…Studies show that lower CRF levels are linked with cardiovascular risk and metabolic syndrome [9,15,16]. Some authors suggest that CRF is connected with the nutritional state in children of school age, meaning that good CRF levels are associated with adequate BMI values [17][18][19]. Also, the literature has shown that CRF might influence the relation between obesity and cardiovascular risk [20][21][22].…”