Vertical Jump and Leg Power Normative Data for Colombian Schoolchildren Aged 9-17.9 Years: The FUPRECOL Study

Ramírez-Vélez, R, Correa-Bautista, JE, Lobelo, F, Cadore, EL, Alonso-Martinez, AM, and Izquierdo, M. Vertical jump and leg power normative data for Colombian schoolchildren aged 9-17.9 years: the FUPRECOL study. J Strength Cond Res 31(4): 990-998, 2017 - The aims of the present study were to generate normative vertical jump height and predicted peak power (P peak) data for 9- to 17.9-year-olds and to investigate between-sex and age group differences in these measures. This was a cross-sectional study of 7,614 healthy schoolchildren (boys n = 3,258 and girls n = 4,356, mean [SD] age 12.8 [2.3] years). Each participant performed 2 countermovement jumps; jump height was calculated using a Takei 5414 Jump-DF Digital Vertical (Takei Scientific Instruments Co., Ltd.). The highest jump was used for analysis and in the calculation of predicted P peak. Centile smoothed curves, percentiles, and tables for the 3rd, 10th, 25th, 50th, 75th, 90th, and 97th percentiles were calculated using Cole's LMS (L [curve Box-Cox], M [curve median], and S [curve coefficient of variation]) method. The 2-way analysis of variance tests showed that maximum jump height (in centimeters) and predicted P peak (in watts) were higher in boys than in girls (p less than 0.01). Post hoc analyses within sexes showed yearly increases in jump height and P peak in all ages. In boys, the maximum jump height and predicted P peak 50th percentile ranged from 24.0 to 38.0 cm and from 845.5 to 3061.6 W, respectively. In girls, the 50th percentile for jump height ranged from 22.3 to 27.0 cm, and the predicted P peak was 710.1-2036.4 W. For girls, jump height increased yearly from 9 to 17.9 years old. Our results provide, for the first time, sex- and age-specific vertical jump height and predicted P peak reference standards for Colombian schoolchildren aged 9-17.9 years. © 2017 National Strength and Conditioning Association

Normative reference of standing long jump for colombian schoolchildren aged 9-17.9 years: The fuprecol study

The purpose of this study was to generate normative values for the standing long jump (SLJ) test in 9- to 17.9-year olds and to investigate sex and age-group differences. The sample comprised 8,034 healthy Colombian schoolchildren [boys n = 3,488 and girls n = 4,546; mean (SD) age 12.8 (±2.3) years old]. Each participant performed two SLJ. Centile smoothed curves, percentile, and tables for the third, 10th, 25th, 50th, 75th, 90th, and 97th percentiles were calculated using Cole's Lambda-Mu-Sigma method. The 2-way analysis of variance tests and Cohen's d showed that the maximum SLJ (centimeter) was higher in boys than in girls across age groups (p less than 0.01), reaching the peak at 13 years. Posthoc analyses within the sexes showed yearly increases in SLJ in all ages. In boys, the 50th percentile SLJ score ranged from 109 to 165 cm. In girls, the 50th percentile jump ranged from 96 to 120 cm. For girls, jump scores increased yearly from age 9 to 12.9 years before reaching a plateau at an age between 13 and 15.9. Our results provide, for the first time, sex- and age-specific SLJ reference values for Colombian schoolchildren aged 9-17.9 years. The normative values presented in this study provide the basis for the determination of the proposed age- and sex-specific standards for the FUPRECOL (Association for Muscular Strength with Early Manifestation of Cardiovascular Disease Risk Factors Among Colombian Children and Adolescents) Study-Physical fitness battery for children and adolescents. © 2016 National Strength and Conditioning Association

Ideal cardiovascular health, handgrip strength, and muscle mass among college students: The fuprecol adults study

The American Heart Association established the 2020 Strategic Impact Goals to define the concept of ideal cardiovascular health (CVH) and the metrics needed to monitor it across populations. The purpose of this study was to investigate the relationship between handgrip strength, muscle mass, and ideal CVH among Colombian college students. Data from 1,835 college students were analyzed (1,128 female). Muscular strength was estimated using a hand-held dynamometer and normalized to body mass (normalized grip strength [NGS]). The percentage of body fat was determined for bioelectrical impedance analysis using tetrapolar whole-body impedance. Ideal CVH was defined as meeting the ideal levels of 4 behaviors (smoking, body mass index, physical activity, and diet adherence) and 3 factors (total cholesterol, fasting glucose, and blood pressure). Higher levels of NGS and muscle mass (relative to body mass) were associated with a higher number of ideal CVH metrics in both sexes (p for trend less than 0.001). For the total ideal CVH metrics scored on a continuous scale from 0 (all 7 poor) to 7 (all 7 ideal), a 1-metric increase was associated with reduced odds of weak NGS (33 and 36%) and low-medium muscle mass (28 and 34%) mass in men and women, respectively (all p less than 0.001). This study indicates that in Colombian college students, both handgrip strength and muscle mass are positively associated with the ideal CVH metrics. To reduce the possible future public health burden of muscular weakness, health professionals need to encourage the public to optimize lifestyle-related risk factors during the young adult stage. © 2019 National Strength and Conditioning Association

Muscle mass to visceral fat ratio is an important predictor of the metabolic syndrome in college students

This study aimed to evaluate the associations between the muscle mass to visceral fat (MVF) ratio and cardiometabolic risk factors in a large population of college students in Colombia and to propose cut-off points of this index for the metabolic syndrome (MetS). A total of 1464 young adults recruited from the FUPRECOL (Asociación de la Fuerza Prensil con Manifestaciones Tempranas de Riesgo Cardiovascular en Jóvenes y Adultos Colombianos) study were categorised into four groups based on their MVF ratio. Muscle mass and visceral fat level of the participants were measured using a bioelectrical impedance analysis. Cardiometabolic risk factors including lifestyle characteristics, anthropometry, blood pressure and biochemical parameters were assessed. The prevalence of moderate to severe obesity, hypertension and the MetS was higher in subjects in quartile (Q)1 (lower MVF ratio) (P less than 0·001). ANCOVA revealed that the subjects in Q1 had higher cardiometabolic disturbances, including altered anthropometry, blood pressure, muscle strength and biochemical parameters after adjusting for age and sex compared with young adults in higher MVF ratio quartiles (P less than 0·001). Muscular mass and physical activity levels were significantly lower in subjects with a lower MVF ratio (P less than 0·001). The receiver operating characteristic curve analyses indicated that in men the best MVF ratio cut-off point for detecting the MetS was 18·0 (AUC 0·83, sensitivity 78 % and specificity 77 %) and for women, the MVF ratio cut-off point was 13·7 (AUC 0·85, sensitivity 76 % and specificity 87 %). A lower MVF ratio is associated with a higher risk cardiometabolic profile in early adulthood, supporting that the MVF ratio could be used as a complementary screening tool that may help clinicians identify young adults at high cardiometabolic risk. © The Authors 2018

Etapas de cambio comportamental frente al consumo de sustancias psicoactivas en escolares de 9 a 17 años de Bogotá D.C., Colombia

Introduction: Psychoactive substance use is a problem that affects schoolchildren from an early age. Objective: To describe the stages of behavior change and their correlation with alcohol, tobacco and drug use in schoolchildren of Bogotá D.C., Colombia. Materials and methods: Cross-sectional study in 6 965 schoolchildren from Bogotá D.C. Behavior change was evaluated by self-report using a structured questionnaire based on the precontemplation, contemplation, preparation and action/maintenance stages of the Transtheoretical Model. Results: 58.4% of the participants were women with a mean age of 12.7±2.3 years. Regarding illicit drug use, 6% of schoolchildren were in the precontemplation stage, 44% in contemplation, 30% in preparation and 20% in action/maintenance. With respect to alcohol consumption, 5% were in precontemplation stage, 36% in contemplation, 12% in preparation and 46% in action/maintenance. Smoking showed prevalence of 4% for precontemplation, 33% for contemplation, 12% for preparation and 51% for action/maintenance. Conclusions: The use of psychoactive substances is an increasing issue among schoolchildren. Most interviewees were in the maintenance stage of tobacco and alcohol use, and in the contemplation stage of drug use. Government efforts are required to promote preventive programs in schools. © 2019, Universidad Nacional de Colombia. All rights reserved

"Etapas de cambio comportamental frente al consumo de sustancias psicoactivas en escolares de 9 a 17 años de Bogotá D.C., Colombia"

"Introduction: Psychoactive substance use is a problem that affects schoolchildren from an early age. Objective: To describe the stages of behavior change and their correlation with alcohol, tobacco and drug use in schoolchildren of Bogotá D.C., Colombia. Materials and methods: Cross-sectional study in 6 965 schoolchildren from Bogotá D.C. Behavior change was evaluated by self-report using a structured questionnaire based on the precontemplation, contemplation, preparation and action/maintenance stages of the Transtheoretical Model. Results: 58.4% of the participants were women with a mean age of 12.7±2.3 years. Regarding illicit drug use, 6% of schoolchildren were in the precontemplation stage, 44% in contemplation, 30% in preparation and 20% in action/maintenance. With respect to alcohol consumption, 5% were in precontemplation stage, 36% in contemplation, 12% in preparation and 46% in action/maintenance. Smoking showed prevalence of 4% for precontemplation, 33% for contemplation, 12% for preparation and 51% for action/maintenance. Conclusions: The use of psychoactive substances is an increasing issue among schoolchildren. Most interviewees were in the maintenance stage of tobacco and alcohol use, and in the contemplation stage of drug use. Government efforts are required to promote preventive programs in schools. © 2019, Universidad Nacional de Colombia. All rights reserved.

Conocimientos, actitudes y prácticas sobre los factores de riesgo relacionados con el autoexamen de mamas y el comportamiento relacionados con el comportamiento para el cáncer de mama entre las estudiantes universitarias en Colombia

Introduction Breast cancer is a growing public health problem worldwide. Breast-self examination (BSE) is an inexpensive strategy proposed to improve early detection behaviors. Behavioral risk factors are crucial for cancer control. More than half of breast cancer cases can be prevented through behavior change. Objectives To describe and establish assocations between the knowledge, attitudes and practices of breast-self examination, the knowledge about breast cancer risk and behavioral-related risk factors for breast cancer among female college students in Bogotá, Colombia. Methods A cross-sectional study was carried out involving data from 628 young female students. Data for BSE were collected using a validated tool and the Behavioral Risk Factors Surveillance System (BRFSS) was used for lifestyle-related variables. Results Women were a mean age of 21.7±11.8 years old. Fifty-seven percent of the women knew how to carry out BSE, although only 26.3 % perfom it monthly. Further, a sedentary lifestyle was found in 53.3 % of women and similar prevalences were observed for other behavioral variables. BSE was associated with age (p=0.02), socioeconomic status (p<0.001), knowledge about risk factors (p<0.001) and unhealthy lifestyles (p<0.001). Conclusions There exists a low level of knowledge and practice of BSE among female college students. This population is at a high-risk of breast cancer beacuse of the critical prevalences of some behaviors related to unhealthy lifestyles found in this study. Further health-promotion strategies are warranted

General strength index and adiposity as a measure of health-related physical fitness among children and adolescents from Bogotá, Colombia: The FUPRECOL study [Índice general de fuerza y adiposidad como medida de la condición física relacionada con la salud en niños y adolescentes de Bogotá, Colombia: Estudio FUPRECOL]"

Objective: The purposes were: a) to generate normative values of general strength index (GSI) scores of 9- to 17.9-year-olds; and b) to describe the associations between GSI and adiposity markers in healthy schoolchildren from Bogotá, Colombia. Methods: From a total of 7,268 Colombian children and adolescents (age 9-17.9 years) taking part in the FUPRECOL study (4,139, 57% girls). A GSI score were measured using handgrip strength and standing long jump. Each of these variables was standardized as follows: standardized value = (value = mean)/SD. The GSI score was calculated as the mean of the two standardized scores and recoded into quartiles Q1 (low GSI) to Q4 (high GSI). Body mass index (BMI), waist circumference (WC), waist-to-height ratio (WtHR) and percentage body fat (%BF) by electrical bioimpedance analysis were measured such as adiposity markers. Results: The average age was 12.8 ± 2.3 years. It can be seen that the results for the boys were generally more homogeneous than for the girls, regarding muscular fitness. There was also a trend towards increased muscular strength in the boys as their age increased, whereas the girls showed stability or a slight increase in GSI. In contrast, there was an inverse relationship between the GSI and WtHR (r = - 0,280, p less than 0,01) and %BF (r = -0,327, p less than 0,01) in males. Participants with Q4 (high GSI), compared to those in with Q1 (low GSI), had significantly lower levels of BMI, WC, WtHR and %BF. Conclusion: This paper presents the first sex- and age-specific percentiles for general strength index score among Colombian children and adolescents aged 9-17.9 years. The testing of muscle strength at early ages should be included in health-monitoring systems. © 2016, Grupo Aula Medica S.A. All rights reserverd

General strength index and adiposity as a measure of health-related physical fitness among children and adolescents from Bogotá, Colombia: The FUPRECOL study [Índice general de fuerza y adiposidad como medida de la condición física relacionada con la salud en niños y adolescentes de Bogotá, Colombia: Estudio FUPRECOL]"

Objective: The purposes were: a) to generate normative values of general strength index (GSI) scores of 9- to 17.9-year-olds; and b) to describe the associations between GSI and adiposity markers in healthy schoolchildren from Bogotá, Colombia. Methods: From a total of 7,268 Colombian children and adolescents (age 9-17.9 years) taking part in the FUPRECOL study (4,139, 57% girls). A GSI score were measured using handgrip strength and standing long jump. Each of these variables was standardized as follows: standardized value = (value = mean)/SD. The GSI score was calculated as the mean of the two standardized scores and recoded into quartiles Q1 (low GSI) to Q4 (high GSI). Body mass index (BMI), waist circumference (WC), waist-to-height ratio (WtHR) and percentage body fat (%BF) by electrical bioimpedance analysis were measured such as adiposity markers. Results: The average age was 12.8 ± 2.3 years. It can be seen that the results for the boys were generally more homogeneous than for the girls, regarding muscular fitness. There was also a trend towards increased muscular strength in the boys as their age increased, whereas the girls showed stability or a slight increase in GSI. In contrast, there was an inverse relationship between the GSI and WtHR (r = - 0,280, p less than 0,01) and %BF (r = -0,327, p less than 0,01) in males. Participants with Q4 (high GSI), compared to those in with Q1 (low GSI), had significantly lower levels of BMI, WC, WtHR and %BF. Conclusion: This paper presents the first sex- and age-specific percentiles for general strength index score among Colombian children and adolescents aged 9-17.9 years. The testing of muscle strength at early ages should be included in health-monitoring systems. © 2016, Grupo Aula Medica S.A. All rights reserverd

Comparison of Different Maximal Oxygen Uptake Equations to Discriminate the Cardiometabolic Risk in Children and Adolescents

Objective: To determine the ability of 8 different maximal oxygen uptake (VO 2max ) equations to discriminate between low and high cardiometabolic risk, and to determine cardiorespiratory fitness (CRF) cutoffs associated with a more favorable cardiometabolic risk profile in Colombian children and adolescents. Study design: In a cross-sectional study, CRF was estimated using the 20-m shuttle run test in 2870 schoolchildren (54.5% girls) from Bogota, Colombia. We computed a metabolic syndrome score (MetScore) as the sum of the age- and sex-standardized scores of waist circumference, triglycerides, high-density lipoprotein cholesterol, glucose, and systolic and diastolic blood pressure. Results: Linear regression analyses showed that the Barnett et al (b) and Mahar equations were negatively associated with MetScore, showing the highest discriminatory accuracy for identifying the low/high cardiometabolic risk in both sexes and both age groups (9-12 years and 13-17 years). Conclusions: We propose that the Barnett et al (b) equation for boys and girls, VO 2max = 25.8 × (6.6 × G × 0.2 × (body mass + 3.2 × (final speed))), where G is gender (male = 0; female = 1), be used to classify youths at metabolic risk. The CRF cutoffs can serve as a quantitative marker of a healthier cardiovascular profile in Colombian children and adolescents. © 2017 Elsevier Inc