Nina Ferrari

Recommendations for Promoting Physical Activity for Children and Adolescents in Germany. A Consensus Statement

Increasing physical activity and reduction of sedentary behaviour play important roles in health promotion and prevention of lifestyle-related diseases in children and adolescents. However, the question of how much physical activity is useful for which target group is still a matter of debate. International guidelines (World Health Organization; European Association for the Study of Obesity), which are mainly based on expert opinions, recommend 60 min of physical activity every day. Age- and sex-specific features and regional differences are not taken into account. Therefore, expert consensus recommendations for promoting physical activity of children and adolescents in Germany were developed with special respect to national data, but also with respect to aspects of specific target groups, e.g., children with a lower socio-economic status (SES) or with migration background. They propose 90 min/day of physical activity, or at least 12,000 steps daily. Additionally, lifestyle factors, especially restriction of media consumption, were integrated. The recommendations provide orientation for parents and caregivers, for institutions such as schools and kindergartens as well as for communities and stakeholders.

Determinants of brain-derived neurotrophic factor (BDNF) in umbilical cord and maternal serum.

OBJECTIVE Brain-derived neurotrophic factor (BDNF) plays a fundamental role in brain development; additionally, it is involved in various aspects of cerebral function, including neurodegenerative and psychiatric diseases. Involvement of BDNF in parturition has not been investigated. The aim of our study was to analyze determinants of umbilical cord BDNF (UC-BDNF) concentrations of healthy, term newborns and their respective mothers. METHODS This cross-sectional prospective study was performed at a tertiary referral center. Maternal venous blood samples were taken on admission to labor ward; newborn venous blood samples were drawn from the umbilical cord (UC), before delivery of the placenta. Analysis was performed with a commercially available immunoassay. Univariate analyses and stepwise multivariate regression models were applied. RESULTS 120 patients were recruited. UC-BDNF levels were lower than maternal serum concentrations (median 641 ng/mL, IQR 506 vs. median 780 ng/mL, IQR 602). Correlation between UC- and maternal BDNF was low (R=0.251, p=0.01). In univariate analysis, mode of delivery (MoD), gestational age (GA), body mass index at delivery, and gestational diabetes were determinants of UC-BDNF (MoD and smoking for maternal BDNF, respectively). Stepwise multivariate regression analysis revealed a model with MoD and GA as determinants for UC-BDNF (MoD for maternal BDNF). CONCLUSIONS MoD and GA at delivery are determinants of circulating BDNF in the mother and newborn. We hypothesize that BDNF, like other neuroendocrine factors, is involved in the neuroendocrine cascade of delivery. Timing and mode of delivery may exert BDNF-induced effects on the cerebral function of newborns and their mothers.

Running Exercise in Obese Pregnancies Prevents IL-6 Trans-signaling in Male Offspring.

PURPOSE Maternal obesity is known to predispose the offspring to impaired glucose metabolism and obesity associated with low-grade inflammation and hypothalamic dysfunction. Because preventive approaches in this context are missing to date, we aimed to identify molecular mechanisms in the offspring that are affected by maternal exercise during pregnancy. METHODS Diet-induced obese mouse dams were divided into a sedentary obese (high-fat diet [HFD]) group and an obese intervention (HFD-running intervention [RUN]) group, which performed voluntary wheel running throughout gestation. Male offspring were compared with the offspring of a sedentary lean control group at postnatal day 21. RESULTS HFD and HFD-RUN offspring showed increased body weight and white adipose tissue mass. Glucose tolerance testing showed mild impairment only in HFD offspring. Serum interleukin-6 (IL-6) levels, hypothalamic and white adipose tissue IL-6 gene expressions, and phosphorylation of signal transducer and activator of transcription 3 in HFD offspring were significantly increased, whereas HFD-RUN was protected against these changes. The altered hypothalamic global gene expression in HFD offspring showed partial normalization in HFD-RUN offspring, especially with respect to IL-6 action. CONCLUSION Maternal exercise in obese pregnancies effectively reduces IL-6 trans-signaling and might be the underlying mechanism for the amelioration of glucose metabolism at postnatal day 21 independent of body composition.

Sociocultural Influence on Obesity and Lifestyle in Children: A Study of Daily Activities, Leisure Time Behavior, Motor Skills, and Weight Status

Background: Juvenile overweight is increasing, and effective preventive measures are needed. After years of arbitrarily assigning these measures disregarding socioeconomic and/or cultural differences, it has become necessary to tailor interventions more specific to these target groups. Providing data for such an intervention is the objective of this study. Methods: Influencing variables on childrens weight status, motor skills and lifestyle have been analyzed among 997 first graders (53.2% male) involved in the Childrens Health InterventionaL Trial (CHILT). Results: Median age was 6.9 years; 7.3% were obese, 8.8% were overweight. Children with low socioeconomic status (SES) were more likely to be obese (p = 0.029). Low SES (p ˂ 0.001), migration background (p = 0.001) and low sports activity levels (p = 0.007) contributed most to an increased consumption of television. Migration background (p = 0.003) and male gender (p < 0.001) were the strongest factors in predicting a greater consumption of computer/video games. Children with higher SES (p = 0.02), lower BMI (p = 0.035), and males (p = 0.001) performed better in motor tests. Conclusion: Children with a low SES and migration background were more likely to exhibit unfavorable health behavior patterns, higher BMI scores, and poorer motor skills. Interventions should integrate motivational and targeting strategies and consider cultural and educational differences to address these vulnerable groups.

Metabolic Syndrome in Children and Adolescents

Background: Juvenile obesity is associated with multiple cardiometabolic comorbidities, which may culminate in the metabolic syndrome (MetS). Methods: Based on a narrative review, the current knowledge of prevalence and the underlying metabolic principles regarding juvenile obesity and MetS are summarized to compile up-to-date information. In addition, the role of lifestyle as well as positive and negative influencing factors are focused on. Results: The prevalence of MetS occurs between 1 and up to 23% in the total pediatric population and in up to 60% amongst the obese and overweight. It can be considered as the consequence of multiple processes in terms of lifestyle, perinatal programming, and (epi-)genetic pathways; however, the complex underlying mechanisms and their interplay are not completely understood. Conclusion: Besides preventive approaches, the growing number of obese children and youth as well as its consequences call for effective and lasting therapeutic measures.

Abnehmen beginnt im Kopf, nicht im Bauch

ZusammenfassungDie Mehrzahl Ihrer Patienten, vor allem die älteren, sind übergewichtig. Viele haben schon versucht, der überflüssigen Kilos Herr zu werden. Wie wichtig ist ein Körpergewicht im Normbereich, und wie können Sie Ihren Patienten helfen, dieses Ziel zu erreichen?

Empfehlungen für körperliche Aktivität und Inaktivität von Kindern und Jugendlichen – Methodisches Vorgehen, Datenbasis und Begründung

The benefits of physical activity and a reduction of sedentary behaviour in childhood and adolescence are well established.Based on a quality-assured literature review, the German recommendations were updated. Guidelines for infants, toddlers, children of kindergarten and primary school age and youth are clearly depictedIn general, a higher amount of physical activity is associated with more health benefits. Preschool age children should have 180 min of physical activity daily, and from primary school age on, at least 90 min daily are recommended. Sedentary behaviour, especially time in front of screens, is to be reduced to a minimum.

Corrigendum to “Determinants of brain-derived neurotrophic factor (BDNF) in umbilical cord and maternal serum” [Psychoneuroendocrinology 63 (2016) 191–197]

Please cite this article in press as: Flöck, A., et al., Corrigendum to “Determinants of brain-derived neurotrophic factor (BDNF) in umbilical cord and maternal serum” [Psychoneuroendocrinology 63 (2016) 191–197]. Psychoneuroendocrinology (2016), http://dx.doi.org/10.1016/j.psyneuen.2016.11.001 erum) mentioned in the publication should read fourfold higher. This applies to the abstract, results section, Table 2 and Figs. 1 and 2. nalyses and conclusions remain valid in their entirety. (b) The correct unit for BDNF is pg/mL. This relates to the abstract and results ection. The authors would like to apologise for any inconvenience caused.

Exercise during pregnancy and its impact on mothers and offspring in humans and mice

Exercise during pregnancy has beneficial effects on maternal and offsprings health in humans and mice. The underlying mechanisms remain unclear. This comparative study aimed to determine the long-term effects of an exercise program on metabolism, weight gain, body composition and changes in hormones [insulin, leptin, brain-derived neurotrophic factor (BDNF)]. Pregnant women (n=34) and mouse dams (n=44) were subjected to an exercise program compared with matched controls (period I). Follow-up in the offspring was performed over 6 months in humans, corresponding to postnatal day (P) 21 in mice (period II). Half of the mouse offspring was challenged with a high-fat diet (HFD) for 6 weeks between P70 and P112 (period III). In period I, exercise during pregnancy led to 6% lower fat content, 40% lower leptin levels and an increase of 50% BDNF levels in humans compared with controls, which was not observed in mice. After period II in humans and mice, offspring body weight did not differ from that of the controls. Further differences were observed in period III. Offspring of exercising mouse dams had significantly lower fat mass and leptin levels compared with controls. In addition, at P112, BDNF levels in offspring were significantly higher from exercising mothers while this effect was completely blunted by HFD feeding. In this study, we found comparable effects on maternal and offsprings weight gain in humans and mice but different effects in insulin, leptin and BDNF. The long-term potential protective effects of exercise on biomarkers should be examined in human studies.

Bewegungsempfehlungen für Frauen während und nach der Schwangerschaft

Regular physical activity during and after pregnancy has beneficial effects for mother and child. German recommendations for physical activity during pregnancy are still missing.We searched PubMed (MedLine) for guidelines published between January 2010 and September 2015 on physical activity during and after pregnancy.A systematic literature research identified 29 articles. Recommendations in the context of specific diseases (gestational diabetes, preeclampsia, obesity, hypertension, PCO, incontinence) or intervention programs were excluded. Only 2 articles met the criteria. 2 separate articles summarizing all international recommendations for physical activity during and after pregnancy were included.In order for mother and child to benefit from physical activity, pregnant women without contraindications should be encouraged to participate in regular physical activity or to remain active. Healthy pregnant and postpartum women should exercise for at least 150 min per week (analogically 20-30 min per day on most or all days of the week) in moderate to vigorous aerobic intensity.