Social Network Lifestyle Interventions Reduce Non-Communicable Diseases Risk Factors in Financial Sector Employees: Randomized Controlled Trial.

OBJECTIVE: To determine if scientifically based social network (Facebook) lifestyle interventions reduce 10-year cardiovascular disease (CVD) risk. METHODS: Financial sector employees (n = 300) were equally randomly assigned: Facebook plus Health Professionals (FB+HP), Facebook (FB), or control (C). We report changes in 10-year Framingham risk score (FRS) for CVD (%) and risk factors over 12 months. RESULTS: FRS did not change within and between groups. Overweight (-7.4% vs -5.6%, P  = 0.005) and diabetes risk (-10.7% vs 0.2%, P  = 0.011) reduced significantly in FB+HP versus FB and C, respectively. Inadequate fruit/vegetable intake (-9.4% vs 3.6%, P  = 0.011) and smoking (-0.7% vs 14.9%) reduced significantly in FB versus C. No significant changes in physical activity, central obesity, hypertension, and hypercholesterolemia between groups. CONCLUSIONS: Scientifically based social network lifestyle intervention programs could be included in workplace health promotional programmes to improve certain non-communicable disease risk factors.

Resting Energy Expenditure and Related Factors in 6- to 9-Year-Old Southern African Children of Diverse Population Groups.

Lower resting energy expenditure (REE) may partially explain the disproportionate prevalence of overweight/obesity among black African women. As no previous studies have investigated the REE of Southern African (South. Afr.) children, we aimed to determine, by sex and population group, the REE of 6- to 9-year-old urban school children. In a cross-sectional study with quota sampling, REE was measured with indirect calorimetry (IC). Confounders considered were: body composition (BC) (fat-free mass (FFM), FFM index, fat mass (FM), FM index), assessed using multifrequency bioelectrical impedance analysis, and physical activity (PA) measured with a pedometer. Multivariate regression was used to calculate REE adjusted for phenotypes (BC, z-scores of weight-for-age, height-for-age, body mass index-for-age) and PA. Sex and population differences in REE were determined with two-way ANOVA. Ninety-four healthy children (59.6% girls; 52.1% black) with similar socioeconomic status and PA opportunities participated. Despite BC variations, sex differences in REE were not significant (41 kcal/day; P = 0.375). The REE of black participants was lower than of white (146 kcal/day; P = 0.002). When adjusted for FFM and HFA z-score, the differences in REE declined but remained clinically meaningful at 91 kcal/day (P = 0.039) and 82 kcal/day (P = 0.108), respectively. We recommend the development of population-specific REE prediction equations for South. Afr. children.

Repeated Annual Health Risk Assessments With Intervention Did Not Reduce 10-year Cardiovascular Disease Risk: A 4-year Longitudinal Study in 13,737 Financial Sector Employees.

OBJECTIVE: To determine if repeat annual health risk assessments (RAHRAs) with intervention reduce 10-year cardiovascular disease (CVD) risk in financial sector employees. METHODS: Retrospective analysis from RAHRAs in 13,737 employees over 4 years. We report changes in 10-year FRS for CVD (%) and risk factors after 1 (GR1), 2 (GR2), and 3 (GR 3) RAHRAs. RESULTS: Mean FRS increased with RAHRAs (GR1: +0.4%; GR2: +0.7%; GR3: +0.8%) (P < 0.001) and was higher for GR3 versus GR1 (P < 0.001) and GR2 (pairwise: P < 0.0355). RAHRAs were associated with increased inadequate fruit/vegetable intake (GR1: +5.4%; GR2: +9.8%; GR3: +15.8%) (all pairwise: P < 0.001) and overweight (GR1: +5.4% vs GR2: +9.8%) (P < 0.001) and only hypercholesterolemia decreased (GR1: -4.4% vs GR3: -9.6%) (P < 0.001). CONCLUSION: RAHRAs did not reduce 10-year CVD risk in financial sector employees. Role of RAHRAs in chronic disease management requires further study.

High Prevalence of Non-Communicable Diseases Risk Factors in 36,074 South African Financial Sector Employees: A Cross-Sectional Study.

OBJECTIVE: To determine the prevalence of non-communicable disease (NCD) risk factors, total NCD risk category and 10-year risk for cardiovascular diseases (CVD) in financial sector employees. METHODS: This descriptive observational cross-sectional analysis, data from 36,074 employees was analysed. NCD risk factor data was obtained from health risk assessments that included a questionnaire and clinical measures. The 10-year risk for CVD was calculated using the Framingham non-laboratory based equation. RESULTS: Inadequate fruit and vegetable intake (89.3%), insufficient physical activity (77.4%), and being overweight (66.8%) were the most prevalent risk factors. Women had significantly higher prevalence ratios for central obesity (2.28; P < 0.001), insufficient physical activity (1.21; P < 0.001), hypercholesterolaemia (1.15; P < 0.001), and overweight (1.08; P < 0.001) compared with men. CONCLUSION: A more concerted effort is required to provide employees with appropriate tools and education at the workplace to decrease and manage NCDs.

Heart rate variability assessment of the effect of physical training on autonomic cardiac control.

BACKGROUND: The effect of exercise interventions on autonomic nervous system (ANS) control of the heart by heart rate variability (HRV) is often investigated in just one position. It was hypothesized that results of exercise-induced changes on ANS are dependent on body position and that it is possible to distinguish between exercise induced changes in vagal and sympathetic influence by taking measurements in different body positions. METHODS: One hundred eighty-three (male = 100, female = 83) healthy volunteers, between 18 and 22 years, participated in a prospective twelve week medium to high intensity exercise intervention study with a self-control design. The influence of the exercise intervention was investigated on supine, rising, and standing as well as on the orthostatic response. Time domain, frequency domain and nonlinear (Poincaré) HRV analysis were performed. RESULTS: The exercise intervention lead to a significant increase (P < 0.05) in vagal influence during supine, rising, and standing. Sympathetic control in the supine position was decreased and increased during rising and standing. In the initial orthostatic response to rising from the supine position, the exercise intervention lead to increased (P < 0.05) vagal withdrawal as well as increased sympathetic control. The orthostatic response measured as the difference between standing and supine indicated only an exercise induced increase in sympathetic control. CONCLUSIONS: Exercise-induced changes in sympathetic and parasympathetic ANS control differ, depending on posture and period of measurement. Exercise induced changes in parasympathetic and sympathetic outflow, respectively, can be extracted from measurements from supine, through the orthostatic response, to standing, thereby detecting changes in ANS that are otherwise obscured.