Palabras claves: ACTIVIDAD FÍSICA/CALIDAD DE VIDA

Title: SECULAR TRENDS IN BODY SIZE AND BODY FAT IN CROATIAN 11-YEAROLDS FROM 1982 TO 2006
Authors: Prof. Misigoj-Durakovic Marjeta, MD PhD FECSS1, Prof. Durakovic Zijad, MD PhD2, Soric Maroje, MD1
Institutions:
1 Department of Kinesiological Anthropology, Faculty of Kinesiology, University of
Zagreb, Croatia
2 Department of Medical Anthropology and Epidemiology, Institute for
Anthropological Research, Zagreb, Croatia
Country: Croatia

Fuente: Foro Mundial de Educación Física; II Cumbre Iberoamericana de Educación Física y Deporte Escolar; Simposio de Actividad Física y Calidad de Vida; Taller Internacional de  Deporte Escolar y Alto Rendimiento, 2010.


The growing epidemic of obesity is becoming pronounced, even among children. Physical inactivity, along with inadequate nutrition, is one of the main reasons of the growing prevalence of obesity. The aim of the study was to
determine secular trends in height (HT), weight (WT), body mass index (BMI) and percent body fat (%BF) in Croatian 11-yr-old children from 1982 to 2006.
METHODS: In 1982 fifty-two participants were selected and the same number of participants was selected 24 yrs later from elementary schools in Zagreb, Croatia. HT, WT, and four sites skinfolds were measured. BMI and %BF according to Slauther’s equation were calculated. BMI cut-off points proposed by the IOTF were used to distinguish between normal- weight and overweight (OW) or obese (OB) children. Secular trends were assessed using two-way ANOVA with time and gender as fixed factors. Differences in proportions were calculated by Fisher's exact te st. RESULTS: Children in 2006 were significantly taller (151.1 [149.7-152.5] cm vs. 146.3 [144.7-148. 0] cm, p<0.001) and heavier (44.4 [42.1- 46.7] kg vs. 37.9 [3 5.9-39.9] kg, p<0.001) compared to their peers 24 years ago. The average BMI increased from 17.7(16.8-18.5) kg/m2 in 1982 to 19,4 (18.5-20.3) kg/m2 in 2006 (p<0.001). Similarly, %BF increased from 19.2% (17.2- 21.1) in 1982 to 24.8% (22.7-26.9) in 2006 (p<0.001). In 1982 four children were OW and one child was OB, while in 2006 twelve children were OW and two were OB. The joined prevalence of OW and OB rose from 10% in 1982 to 27% in 2006 (p=0,04). CONCLUSION: Secular trends in both body size and adiposity were noted between 1982 and 2006. Consequently, a significant rise in the prevalence of overweight (including obesity) was found. Initiatives aiming to increase physical activity are warranted in order to reverse secular trends in adiposity.