Bone density and body composition in newly licenced professional jockeys.

The primary objective is the description of bone mineral density (BMD) and body composition in newly licensed jockeys. One in three male, flat jockeys has a very low bone mineral density. Further research is needed to assess the short-term risk of fractures and long-term health implications of these findings. INTRODUCTION: Describe bone mineral density (BMD) and body composition in entry-level male and female, flat and jump jockeys in Great Britain. METHODS: Data was collected on jockeys applying for a professional jockey license between 2013 and 2015. Areal BMD at the spine, femoral neck (FN), total hip and body composition were assessed by dual-energy X-ray absorptiometry (DXA) scan. We examined differences between BMD and body composition by gender and race type (flat or jump). Volumetric bone mineral apparent density (BMAD) of the spine and FN was also calculated to account for group differences in bone size. RESULTS: Seventy-nine male flat jockeys (age 18.5 ± 1.9, BMI 19.0 ± 1.4), 69 male jump (age 20.7 ± 2.0, BMI 20.6 ± 1.3) and 37 female flat jockeys (age 19.3 ± 2.0, BMI 20.8 ± 1.7) took part in this study. Spine BMD Z-scores ≤-2 for male flat, male jump and female flat jockeys were 29, 13 and 2.7%, respectively. Spine BMD was lower in male than female flat jockeys (p<0.001). All BMD scores were lower in male flat compared to male jump jockeys (p<0.001). Body fat percent (BF %) was lower in male flat jockeys compared to male jump and female flat jockeys (p<0.05). Lean mass index (LMI) was lower in male flat compared to male jump jockeys (p<0.001). CONCLUSIONS: Male flat jockeys had a significantly lower BMD, LMI and BF% compared to jump jockeys and female flat jockeys. Male flat jockeys had lower spine BMD scores than females. Individual bone maturation may influence these findings. Further investigation into the relevance of low BMD and altered body composition on jockey health is required.

Fear of COVID-19, mental health, and pregnancy outcomes in the pregnancy during the COVID-19 pandemic study: Fear of COVID-19 and pregnancy outcomes.

BACKGROUND: Sustained fear during pregnancy has the potential to increase psychological distress and obstetric risk. This study aimed to (1) identify factors and characteristics associated with fear of COVID-19, (2) investigate the relationship between fear of COVID-19 and maternal anxiety and depression, and (3) determine the relationship between fear of COVID-19 and pregnancy outcomes. METHODS: 9251 pregnant Canadians were recruited between April - December 2020. Participants self-reported (scale of 0-100) the degree of threat they perceived from the SARS-CoV-2 virus in relation to themselves and their unborn baby. RESULTS: Mean fear scores indicated moderate to elevated concern. In multivariable linear regression, fear of COVID-19 was associated with food insecurity, ethnicity, geographic location, history of anxiety prior to pregnancy, having a chronic health condition, pre-pregnancy BMI, parity, and stage of pregnancy at study enrollment. Higher COVID-19 fear was associated with increased odds of depression, adjusted odds ratio (aOR) = 1.75, p < 0.001, 95% CI 1.66-1.85, and anxiety, aOR=2.04, p < 0.001, 95% CI 1.94-2.15). Furthermore, fear of COVID-19 was associated with a 192-gram reduction in infant birthweight, and a 6.1-day reduction in gestational age at birth. LIMITATIONS: The sample has higher education compared to the Canadian population and cannot test causal effects. CONCLUSION: This study suggests that sociodemographic, health, and obstetric factors may contribute to increased fear of COVID-19 and associated adverse psychological and pregnancy outcomes.

Neighbourhood characteristics, lifestyle factors, and child development: Secondary analysis of the All our families cohort study.

Background: Neighbourhood characteristics have been found to influence child development, but little is known about lifestyle factors that may moderate this relationship, which can provide modifiable targets for policies and programing. This study investigated the association between neighbourhood characteristics (e.g., deprivation, disorder) during pregnancy and child development at age 5 in relation to various lifestyle factors (e.g., physical activity, parent-child reading, community resource use) during early childhood. Methods: A secondary analysis was conducted using multilevel modeling of data from the All Our Families cohort, recruited in Canada from 2008 to 2010. Participants self-reported on demographics during pregnancy, lifestyle factors at 3 years, and child development at 5 years using the Ages and Stages Questionnaire (ASQ-3). Neighbourhood deprivation was evaluated using the Vancouver Area Deprivation Index (VANDIX), while disorder was measured using police services' community crime reports. Results: Geocoded information was available for 2,444 participants. After adjusting for covariates, multilevel modeling indicated a significant negative association between neighbourhood deprivation and overall child development (b = -.726, 95% CI: -1.344, -.120). Parent-child reading was found to be a significant moderator of the effect of neighbourhood disorder (b = .005, 95% CI: .001, .009). There were no statistically significant moderation effects for physical activity or community resource use. Conclusion: Neighbourhood deprivation during pregnancy is associated with early child development. Parent-child reading may function as a protective factor in the presence of higher neighbourhood disorder. Overall, neighbourhood-level effects should be considered in policies and community programs that promote family and child well-being.