Percorrer por autor "Gómez-Campos, Rossana"
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- Linear and nonlinear relationships between body mass index and physical fitness in Brazilian children and adolescentsPublication . Lopes, Vitor P.; Cossio-Bolaños, Marco; Gómez-Campos, Rossana; Arruda, Miguel de; Hespanhol, Jefferson Eduardo; Rodrigues, Luis PauloThe purpose of this study was to evaluate the linear and curvilinear relationship between body mass index (BMI) and physical fitness in children and adolescents. Participants were 4567 (2505 girls) children aged 6–16 years. Weight and height were measured and BMI was calculated and adjusted for age and sex using WHO z-scores. Physical fitness was evaluated with the following tests: Yo-Yo test, standing long jump, seated 2-kg medicine ball throw, and 20-m dash. Participants were grouped into two groups according to their maturity status, estimated as years from peak height velocity. Associations were determined with linear and nonlinear quadratic regression models. The nonlinear quadratic regression coefficient was significant for the 20-m dash among girls of both maturity status levels, and in maturity status level 1 boys; for the standing long jump among boys of both maturity status levels, and in maturity status level 1 girls. The Yo-Yo test was only significant for maturity status level 1 boys. For the medicine ball throw, the linear regression coefficient was significant for both maturity status levels in both sexes. Almost all physical fitness items were observed to have meaningfully large nonlinear relationships with BMIz, but they were not all significant due to the small sample size, especially in maturity status level 2. Conclusion: The association between BMI and physical fitness is nonlinear in the majority of its components, and those with lower and higher BMI had poorer fitness.
- Motor competence predicts self-esteem during childhood in typical development childrenPublication . Lopes, Vitor P.; Martins, Susana; Gonçalves, Celina; Cossio-Bolaños, Marco; Gómez-Campos, Rossana; Rodrigues, Luis PauloThe purpose of this study was to study the relationship between motor competence (MC) and self-esteem in children between 7 and 13 years of age. Methods: This is five years mixed longitudinal study, although only the last two years were included in the analysis. Participants were N = 144 of both sexes (69 girls) divided in 6 cohorts. At baseline the youngest and the oldest cohorts had 4 and 9 years of age respectively. MC was assessed with KTK. Self-esteem and self-worth were assessed with the Portuguese version of Physical Self-Perception Profile for Children and Youth (PSPP-CY). Cross-lagged models were used to find out whether MC predicts self-esteem and self-worth, or the reverse. Linear mixed models were applied. Results: Overall, only self-esteem was predicted by MC across age. Results show that self-esteem had a significant decrease between 7 and 13 years of age (−0.56) and that MC is positively associated with self-esteem (b = 0.006). Conclusions: MC had a mitigating effect on the decrease of self-esteem. Promoting MC during childhood and adolescence might have a positive effect on children's well-being and mental health and prevent them to dropout from physical activities
- Muscle strength and body fat percentage in children and adolescents from the Maule region, ChilePublication . Cossio-Bolaños, Marco; Gómez-Campos, Rossana; Campos, Luis Felipe Castelli Correia; Sulla-Torres, Jose; Urra-Albornoz, Camilo; Lopes, Vitor P.To analyze the association between relative handgrip strength (RHGS) and fat mass (FM) after controlling for the potential effect of maturity status. Methodology. Both male and female children and adolescents aged ≥ 7.5 to ≤ 15.49 years were studied. RHGS was assessed using a hydraulic hand dynamometer. FM percentage was established using a dual-energy X-ray absorptiometry. Age and sex differences in RHGS levels between normal weight and obese participants were studied with an analysis of covariance. A covariate was years from peak height velocity (maturity status). The association between RHGS and FM levels was analyzed using a partial correlation and controlling for age at peak height velocity. Results. A total of 1685 students (731 girls and 954 boys) participated. Four age groups were established (7.5-9.4 years, 9.5-11.4 years, 11.5- 13.4 years, and 13.5-15.4 years). RHGS increased with age in both males and females. FM values were high in all age groups. No differences were observed in groups 3 and 4 among girls or in group 4 among boys. Participants classified as normal weight showed a significantly higher RHGS than their obese peers. A negative association was noted between RHGS and FM
- Reference standards to assess physical fitness of children and adolescents of Brazil: An approach to the students of the Lake Itaipú region-BrazilPublication . Hobold, Edilson; Lopes, Vitor P.; Gómez-Campos, Rossana; Arruda, Miguel de; Andruske, Cynthia Lee; Pacheco-Carrillo, Jaime; Cossio-Bolaños, Marcohe importance of assessing body fat variables and physical fitness tests plays an important role in monitoring the level of activity and physical fitness of the general population. The objective of this study was to develop reference norms to evaluate the physical fitness aptitudes of children and adolescents based on age and sex from the lake region of Itaipú, Brazil. Methods. A descriptive cross-sectional study was carried out with 5,962 students (2,938 males and 3,024 females) with an age range of 6.0 and 17.9 years. Weight (kg), height (cm), and triceps (mm), and sub-scapular skinfolds (mm) were measured. Body Mass Index (BMI kg/m 2 ) was calculated. To evaluate the four physical fitness aptitude dimensions (morphological, muscular strength, flexibility, and cardio-respiratory), the following physical education tests were given to the students: sit-and-reach (cm), pushups (rep), standing long jump (cm), and 20-m shuttle run (m). Results and Discussion. Females showed greater flexibility in the sit-and-reach test and greater body fat than the males. No differences were found in BMI. Percentiles were created for the four components for the physical fitness aptitudes, BMI, and skinfolds by using the LMS method based on age and sex. The proposed reference values may be used for detecting talents and promoting health in children and adolescents.
- Relación entre adiposidad corporal y aptitud aeróbica en adolecentes de la Isla de Santiago (Cabo Verde)Publication . Lopes, Otniel J.P.B; Vidal Espinoza, Rubén; Cossio-Bolaños, Marco; Gómez-Campos, Rossana; Urra-Albornoz, Camilo; Lopes, Vitor P.El exceso de adiposidad corporal, general-mente se considera como un factor negativo en el rendi-miento físico.Objetivo: Comparar los niveles de adiposidad corporal yaptitud aeróbica con estudios referenciales y verificar la re-lación entre adiposidad corporal con la aptitud aeróbica deadolescentes. Material y Métodos: Se efectuó un estudio descriptivocomparativo-correlacional. Fueron estudiados 113 adolescen-tes con un rango de edad entre 12,0 a 16,9 años (89 hom-bres y 113 mujeres). Se evaluó el peso, la estatura, circunfe-rencia de la cintura CC y la aptitud aeróbica (AA) por mediode la prueba de la Milla. Se calculó el Índice de Masa Corporal(IMC) y VO2max (ml/kg/min-1). Resultados: En los hombres, los valores del IMC son infe-riores desde -11.60 a -13.50kg/m2, en la CC desde -9,80 a -15,90cm. En las mujeres, el IMC es inferior desde -3.90 a -5.20kg/m2 y en la CC desde -2,40 a -5,40cm. En la AA, el VO2maxfue superior a la referencia, en hombres los valores oscilan en-tre 4,20 a 9,50 ml/kg/min y en mujeres oscilaron desde 3,90 a5,60ml/kg/min. Las correlaciones entre IMC y CC con VO2maxen hombres fueron negativas (r= -0,62 a -0,58; p<0,001) y enmujeres fue de (r= -0,83 a -0,81; p<0,001). Se verificó que losadolescentes clasificados con exceso de peso presentaron va-lores inferiores de AA en relación a los normopeso y bajo peso.Esto indica que los adolescentes deben reflejar valores de adi-posidad aceptables, no solo para mantener adecuadamente suestado nutricional, sino también para mejorar su capacidadcardiorespiratoria.Conclusión: Los parámetros de adiposidad corporal fue-ron inferiores y los niveles de AE fueron superiores en com-paración con sus respectivas referencias. Además, se observóque la AE se asocia inversamente con los indicadores de adi-posidad corporal en adolescentes de ambos sexos.