Physical Activity at School Recess: A Key Element in Balancing Social Disparities.

BACKGROUND: Since children are generally not achieving desirable levels of physical activity (PA), schools can provide an opportunity to increase their active time. This study aimed to describe individual- and social-level variables associated with PA at school recess in a culturally diverse primary school. METHODS: This observational cross-sectional study included 131 children attending primary school. PA data were measured via accelerometry during school recess and analyzed in relation to data on sociodemographics, anthropometrics, and PA outside school. Data were analyzed using generalized linear modeling and logistic regression. FINDINGS: Girls were more sedentary and engaged in less moderate to vigorous physical activity (MVPA) than boys (p < .001), while older girls were less active than younger girls (p < .001). Also, non-Caucasian children were less sedentary (p < .001) and engaged in more MVPA (p = .007). Belonging to ethnic minorities was also associated with lower socioeconomic status, higher body mass index, and less PA outside of school and on weekends. CONCLUSIONS: Girls (especially older girls) and children from lower socioeconomic contexts should be prioritized when promoting PA. IMPLICATIONS FOR SCHOOL HEALTH POLICY: School recess can be used as an effective strategy aimed at increasing PA and reducing social inequalities.

Successful breastfeeding among women with intention to breastfeed: From physiology to socio-cultural factors.

BACKGROUND: Even if women have intention to breastfeed, they do not always achieve a successful breastfeeding. AIM: This study aims to analyse factors affecting breastfeeding prevalence among mothers that intended to breastfeed. METHODS: This is a prospective observational study involving 401 pregnant women that intended to breastfeed (asked at the 20th week). Breastfeeding prevalence was evaluated in reference to health-related, socio-cultural factors and healthcare professionals' interventions at 1 month, 6 months and 12 months after birth. Data were analysed using descriptive statistical methods, bivariate logistic regression and multivariate logistic regression modelling. RESULTS: Independent factors negatively affecting breastfeeding prevalence related to mothers' and newborns' health parameters and birth characteristics included smoking during pregnancy, anaemia and use of analgesia during labour. Regarding sociocultural parameters, being an immigrant, higher education level, intention to breastfeed before pregnancy, comfort with public breastfeeding and bedsharing were positively linked to breastfeeding, while teat or pacifier use in the first week was negatively linked. Regarding healthcare professionals' practices, mother and father/partner antenatal education course attendance and exclusive breastfeeding at the hospital were positively associated with breastfeeding. CONCLUSION: Breastfeeding is a very complex phenomenon affected by multiple and diverse variables. Physiological factors only affect the short term (1st month), while middle and long term BF affecting variables are mainly identical and include mostly socio-cultural factors and also BF related practices, especially in the first days after birth. These data should help to develop more effective breastfeeding promotion strategies.

Patterns of Change in Dietary Habits and Physical Activity during Lockdown in Spain Due to the COVID-19 Pandemic.

BACKGROUND: Lockdown due to COVID-19 influenced food habits and lifestyles with potential negative health impact. This study aims to identify patterns of change in eating habits and physical activity during COVID-19 lockdown in Spain and to identify associations with sociodemographic factors and usual habits. METHODS: This cross-sectional study included 1155 adults recruited online to answer a 10-section questionnaire. The protocol assessed usual diet by means of a semi-quantitative food frequency questionnaire, usual physical activity (PA) and supplement use, dietary changes, sedentary time, PA, exposure to sunlight, sleep quality, and smoking during confinement. Patterns of dietary change were identified by factor analysis. Factor scores were included in cluster analysis together with change in PA. RESULTS: Six patterns of dietary change were identified that together with PA changes during lockdown defined three clusters of lifestyle change: a cluster less active, a more active cluster, and a third cluster as active as usual. People who were usually less active were more likely to be classified in the cluster that increased physical activity in confinement. Scores of the Healthy Mediterranean-Style dietary pattern were higher in this group. Conclusions: Different patterns of change in lifestyles in confinement suggest the need to tailor support and advice to different population groups.

Physical exercise interventions have no effect on serum BDNF concentration in older adults living in long-term nursing homes.

Physical exercise protects against age-related cognitive decline. Brain-derived neurotrophic factor (BDNF) may mediate some of the cognitive benefits of physical exercise, but the effect of physical exercise on serum BDNF is unclear. Indeed, differential findings have been reported depending on the characteristics of the participants and the intensity, duration, and type of exercise. The aim of this study was to determine whether three different physical exercise interventions alter serum BDNF levels in older adults living in long-term nursing homes (LTNHs) and whether changes in physical, cognitive, and dual-task performance are related to changes in serum BDNF. LTNH study participants (n = 126) were randomly assigned to multicomponent or dual-task training or a walking program and serum BDNF levels were analyzed by ELISA. We also assessed physical, cognitive, and dual-task parameters. Neither the multicomponent, dual-task, nor walking exercise programs caused changes in serum BDNF concentration in older adults living in LTNHs. Changes in BDNF during the interventions were not significantly associated with modifications in physical, cognitive or dual-task performance parameters. Our results provide new evidence clarifying the relationship between physical and cognitive exercise and BDNF.

Cambios en los hábitos alimentarios durante el periodo de confinamiento por la pandemia COVID-19 en España / Changes in eating habits during lockdown period due to the COVID-19 pandemic in Spain

FUNDAMENTOS: El cierre de fronteras, el confinamiento de la población y el distanciamiento físico han sido las principales medidas instauradas en muchos países para contener el alcance y gravedad de la pandemia COVID-19. En este estudio se analizan los cambios en los hábitos alimentarios y en otros estilos de vida durante el periodo de confinamiento en un grupo de población en España. MATERIAL Y MÉTODOS: Se ha realizado un estudio transversal, observacional en una muestra de conveniencia de personas mayores de 18 años de edad, reclutada de forma electrónica entre el 21 de abril y 8 de mayo de 2020 (semanas 6-8 de confinamiento) en España (n= 1036). El protocolo contemplaba datos sociodemográficos, características del confinamiento, hábitos de consumo alimentario y actividad física usuales, y modificaciones durante el periodo de confinamiento. RESULTADOS: Los cambios más frecuentes se refieren a mayor consumo de fruta (27%), huevos (25,4%), legumbres (22,5%), verduras (21%) y pescado (20%) y reducción en el consumo de carnes procesadas (35,5%), cordero o conejo (32%), pizza (32,6%), bebidas alcohólicas destiladas (44,2%), bebidas azucaradas (32,8%) o chocolate (25,8%), con algunas diferencias sobre todo en función de la edad y el grado de adecuación de la dieta usual. Un 14,1% que habitualmente no cocina, lo hace en este periodo. El 15% no realiza ejercicio físico, 24,6% pasa sentado más de 9 horas diarias y el 30,7% de las personas fumadoras (14,7%) fuma más. Un 37% refiere no dormir bien. CONCLUSIONES: Los participantes en este estudio refieren cambios alimentarios en el periodo de confinamiento en España con tendencia hacia mayor consumo de alimentos saludables, menor consumo de alimentos de menos interés nutricional y aumento de la práctica de cocinar en casa

BACKGROUND: The lockout of borders, lockdown of the population and social isolation are key measures adopted in many countries to contain the COVID-19 pandemic. This study describes changes in eating habits and other lifestyles during confinement in a population group in Spain. METHODS: A cross-sectional, observational study was conducted on a convenience sample of people aged 18 yr. and over, recruited online between April 21 and May 8, 2020 (weeks 6-8 of lockdown) in Spain (n = 1036). The protocol considered sociodemographic data, characteristics of confinement, usual food consumption and physical activity, and changes during confinement. RESULTS: Most frequently reported changes in dietary habits are increased consumption of fruit (27%), eggs (25.4%), legumes (22.5%), vegetables (21%) and fish (20%) and reduced consumption of processed meats (35.5%), lamb or rabbit (32%), pizza (32.6%), distilled alcoholic beverages (44.2%), sugary drinks (32.8%) or chocolate (25.8%). Some differences were observed depending on age and adequacy of the usual diet. Some 14.1% who do not usually cook do so during this period; 15% do not do physical exercise, 24.6% sit more than 9 hours a day and 30.7% of smokers (14.7%) report increased tobacco use. 37% reported not sleeping well. CONCLUSIONS: Participants in this study report dietary changes during lockdown in Spain with a trend towards greater consumption of healthier foods, less consumption of foods of poor nutritional interest and an increase in the practice of cooking at home

Bone Health and Its Relationship with Impact Loading and the Continuity of Physical Activity throughout School Periods.

Bone is influenced by physical activity (PA) throughout life, but childhood and adolescence provide a key opportunity to maximize peak bone mass. Thus, it is important to identify the relationship between PA practiced in childhood and young adulthood to design a promotion plan for bone health. The purpose of this study was to analyze the relationship between different impact-loading PAs (and their continuity throughout school periods from childhood to young adulthood) and bone stiffness index (SI). In this cross-sectional study, which was conducted on 145 university students aged 18-21 years, bone measurements were measured by quantitative ultrasonometry (QUS), and PA information was recalled using a self-administered questionnaire. Associations between the SI and the impact of PA performed during secondary school (p = 0.027), high school (p = 0.002), and university (p = 0.016) periods were observed. The continuity of PA over a longer period of time was related to a higher SI (p = 0.007). Those who practiced PA throughout all school periods had a higher SI than those who practiced during primary school only (p = 0.038) or through primary and secondary schools (p = 0.009). These results suggest that impact-loading PA practiced during different school periods is related to higher values of the SI. Therefore, continuous PA from an early age may be an important contributing factor to achieving and maintaining adequate bone health.

Serum Myostatin Levels Are Higher in Fitter, More Active, and Non-Frail Long-Term Nursing Home Residents and Increase after a Physical Exercise Intervention.

BACKGROUND: Myostatin has been proposed as a candidate biomarker for frailty and sarcopenia. However, the relationship of myostatin with these conditions remains inconclusive. OBJECTIVE: To determine the association of serum myostatin concentration with body composition, physical fitness, physical activity level, and frailty in long-term nursing home residents. We also aimed to ascertain the effect of an exercise program on myostatin levels. METHODS: We obtained study data on 112 participants from long-term nursing homes. Participants were randomly assigned to a control or an intervention group and performed a 6-month multicomponent exercise program. Serum myostatin levels were analyzed by ELISA. Assessments also included body composition (anthropometry and bioelectrical impedance), physical fitness (Senior Fitness Test), physical activity level (accelerometry), and frailty (Fried frailty criteria, Clinical Frailty Scale, and Tilburg frailty indicator). RESULTS: The concentration of myostatin at baseline was positively correlated with: a leaner body composition (p < 0.05), and a higher number of steps per day and light and moderate-vigorous physical activity in women (p < 0.005); greater upper and lower limb strength, endurance, and poorer flexibility (p < 0.05) in men; and better performance (less time) in the 8-ft timed up-and-go test in both women (p < 0.01) and men (p < 0.005). We observed higher concentrations of serum myostatin in non-frail than in frail participants (p < 0.05). Additionally, we found that the implemented physical exercise intervention, which was effective to improve physical fitness, increased myostatin concentration in men (p < 0.05) but not in women. The improvements in physical condition were related with increases in serum myostatin only in men (p < 0.05-0.01). CONCLUSIONS: Higher serum levels of myostatin were found to be associated with better physical fitness. The improvements in physical fitness after the intervention were positively related to increases in myostatin concentrations in men. These results seem to rule out the idea that high serum myostatin levels are indicative of frailty in long-term nursing home residents. However, although the direction of association was opposite to that expected for the function of myostatin, the use of this protein as a biomarker for physical fitness, rather than frailty, merits further study.

Associations of Anthropometric Characteristics, Dietary Habits, and Aerobic Capacity With Cardiovascular Risk Factors of Health-Science Students.

The aim of this cross-sectional study was to study the relative importance of dietary habits and aerobic capacity in parameters related to cardiovascular risk in 271 female and 95 male health-science students (mean age = 19.1 ± 1.4 years). In females, fatty-meat consumption predicted triglycerides (ß = .649, p < .001) and high-density lipoprotein (HDL; ß = -.242, p = .001) and low-density lipoprotein (LDL; ß = .373, p < .001) cholesterol levels. Consumption of nuts, legumes, and complex carbohydrates predicted triglyceride (ß = -.099, p = .074), HDL (ß = .231, p = .001), and LDL (ß = -.155, p = .025) levels, respectively. Aerobic capacity (ß = -.245, p < .001) and fatty-meat intake (ß = .230, p < .001) predicted diastolic blood pressure (BP); body mass index (BMI) predicted systolic BP (ß = .340, p < .001). In males, body fat percentage was the strongest predictor of triglycerides (ß = .348, p = .004), cholesterol (ß = .366, p = .006), HDL (ß = -.378, p = .004), and LDL (ß = .271, p = .043) levels. Aerobic capacity (ß = -.263, p = .013) and fatty-meat consumption (ß = .334, p = .005) independently predicted triglyceride levels. Nut (ß = -.286, p = .013) and fatty-meat intake (ß = .361, p = .002) predicted systolic BP, while BMI predicted diastolic BP (ß = .209, p = .045). As health sciences students, these participants are future health professionals; targeting such populations is important for chronic disease prevention.

Physical Activity, Physical Fitness, Body Composition, and Nutrition Are Associated with Bone Status in University Students.

Understanding the modifiable factors that improve and maximize peak bone mass at an early age is necessary to design more effective intervention programs to prevent osteoporosis. To identify these modifiable factors, we analyzed the relationship of physical activity (PA), physical fitness, body composition, and dietary intake with bone stiffness index (SI), measured by quantitative ultrasonometry in young university students (18-21 years). Moderate-to-vigorous PA (MVPA) was the strongest predictor of SI (ß = 0.184; p = 0.035). SI was most closely related with very vigorous PA in males (ß = 0.288; p = 0.040) and with the number of steps/day in females (ß = 0.319; p = 0.002). An association between thigh muscle and SI was consistent in both sexes (ß = 0.328; p < 0.001). Additionally, extension maximal force was a bone SI predictor factor in females (ß = 0.263; p = 0.016) independent of thigh muscle perimeter. Calcium intake was the only nutrition parameter that had a positive relationship with SI (R = 0.217; p = 0.022). However, it was not included as a predictor for SI in our regression models. This study identifies predictors of bone status in each sex and indicates that muscle and bone interrelate with PA and fitness in young adults.

Adaptive response in the antioxidant defence system in the course and outcome in first-episode schizophrenia patients: a 12-months follow-up study.

Correlation of plasma antioxidant enzyme activity with the course and outcome in first-episode schizophrenia patients (n=49) was analyzed in order to assess the possible utility of peripheral markers of oxidative stress as prognostic factors. These markers were measured shortly after the onset of schizophrenia, and again 1, 6 and 12 months later. A decrease in catalase (CAT), glutathione peroxidase (GPx), superoxide dismutase (SOD), and glutathione (GSH) levels and total antioxidant status (TAS), as well as an increase in thiobarbituric acid reactive substances (TBARS), were observed 1 month after (p<0.05). 6-Months later, there was a reduction in TAS, GSH, SOD and GPx, and a increase in TBARS (p<0.05), with a normalization of CAT levels, indicating a persistent alteration of the antioxidant system and the maintenance of oxidative stress. At 12-months, a considerable decrease was observed in TBARS. Additionally, while the level of GPx decreased (p<0.05) further, SOD and GSH levels and TAS were normalizing, indicating a partial regeneration of the antioxidant defence system. These results indicate the possible contribution of oxidative stress to the onset and pathophysiology of schizophrenia, suggesting the involvement of an adaptive response in the antioxidant defence system in the course and outcome in first-episode schizophrenia patients.