Behavioral sequelae of exposure to high power microwave fields

Behavioral sequelae of exposure to high peak power microwave pulses, similar to those produced by operational radar systems and experimental, directed energy weapons systems, were studied using rats trained on fixed-ratio, variable-interval, and differential reinforcement-of-low rate schedules. Ten minute exposures to 240, 720, 2160, and 6480 pulses at a 1 Megawatt peak power level caused a rectal temperature rise of 0.7 to 2.5°C in the animals. Regardless of their schedule of reinforcement, animals exposed to the highest dose level failed to respond, on the average, for 13 minutes after the exposure when they were placed in operant conditioning chambers. However, as soon as their rectal temperatures decreased, responding resumed and no further changes in response pattern were exhibited. No long-term effects were observed in exposed animals. Thus, the behavioral effects that were seen were thermal in nature and independent of the pulsed nature of the fields. This research was supported by the U.S. Army Medical Research and Development Command under the contract # DAMD 17-85-C-5083 awarded to ERC BioServices Corporation and was conducted at Walter Reed Army Institute of Research, Department of Microwave Research. The research was conducted in compliance with the Animal Welfare Act and other Federal statutes and regulations relating to animals and experiments involving animals. This study adheres to the principles stated in theGuide for the Care and Use of Laboratory Animals, NIH publication 85-23. The views of the author do not purport to reflect the position of the Department of Defense of the Department of the Army (Para 4-3, AR 360-5).     

Body esteem and body fat in British school children from different ethnic groups

The aim of the study was to examine the relationship between body esteem and body fat in British school children. Two hundred and seventy seven, 11–14-year-old children from central England took part in the study. Body esteem was measured using the Body Esteem Scale for children and percent body fat was determined by skin-fold measures. Results indicate that body esteem and adiposity were negatively related for the whole sample, for boys and girls and for White children, Black children and Asian children. Factorial ANOVA also indicated differences in body esteem according to gender and ethnicity. Boys and Black children had significantly higher body esteem than girls and Asian children respectively. Differences in body fat were also evident according to gender with boys being leaner than girls. No differences in body esteem or body fat were evident across school years.     

Correction to: Quality of Life among Caregivers of Children with Autism Spectrum Disorders,Intellectual Disability,and Typical Development

Applied Research in Quality of Life - A Correction to this paper has been published: https://doi.org/10.1007/s11482-020-09896-1     

Effects of a 6-week circuit training intervention on body esteem and body mass index in British primary school children

Research examining the impact of physical activity on children's body image has been limited and equivocal. The current researchers examined the effect of 6-week circuit-based training on body esteem and body mass index (BMI) in 68 British children (34 boys and 34 girls, aged 10–11 years, 16% overweight, 7% obese). The Body Esteem Scale for Children (BES-C) was administered to both the intervention group and control group, pre, post and 6 weeks post the intervention. BMI was directly assessed from height and body mass pre- and post-intervention. The results of this study revealed that, as compared to the control group, participation in 6-week circuit training significantly improved body esteem scores post-intervention. However, these scores were not sustained 6 weeks post-intervention. The improvement in body esteem scores from pre- to post-intervention was greater for girls as compared to boys. Additionally, BMI decreased significantly in the intervention group compared to the control group.     

Relationship between body image and percent body fat among British school children

The aim of the study was to examine the relationship between body image and percent body fat in British school children. A total of 223 11- to 14-yr.-old children from central England took part in the study. Body image was measured using a self-report questionnaire, and percent body fat was measured using skinfold indices. Analysis indicated that body image and adiposity were significantly (p<.01) related for the whole sample, for boys and girls and for White children, Black children, and Asian children. An analysis of variance further indicated significant differences in body image and adiposity between boys and girls, with boys having a more positive body image and a lower percent body fat. Differences (p<.05) were also evident between Black and Asian children, with Black children having a more positive body image and lower percent body fat. No differences were evident between Black and White children or Asian and White children.     

High-Risk Behavior Among Young Adolescents in The Central and Northern Region of Peninsular Malaysia: Baseline Data from The MyHeART Study

The onset of high-risk behaviors in adolescents are associated with family, social and behavioral factors. This study aims to describe the prevalence of high-risk behaviors among young adolescents in Peninsular Malaysia and determine the relationship between high-risk behaviors and family sociodemographics and behaviors. The data utilized are from the Malaysian Health and Adolescents Longitudinal Research Study, a prospective cohort analysis conducted in three large states of Peninsular Malaysia: Selangor, Perak, and the Federal Territory of Kuala Lumpur. The sample included 13-year-old adolescents in their first year of secondary school. Students and parents or guardians were given separate, standardized self-administered questionnaire. A high-risk behavior variable was determined on the basis of exposure to substance use (tobacco, alcohol, and illicit drugs), gambling, and online pornography or violence. The exploratory variable of interest (family sociodemographics) was defined as parents’ demographics, employment status, education level, and socioeconomic status. The analysis included 1341 adolescents and 1146 parents. Of the school-going adolescents, 4.7?% (n?=?52) reported HRBs. Tobacco use (9?%, n?=?1 19) and watching pornography or violent content on the Internet (5?%, n?=?72) accounted for most of the behaviors, whereas illicit drug use contributed the least (2?%, n?=?32). More adolescents from the higher socioeconomic groups, than from the middle groups exhibited high-risk behaviors (odds ratio ?=?3.039, 95?% confidence interval?=?2.884–3.202); by contrast, the odds ratio of high-risk behavior among adolescents with a low socio-economic status was 2.246 (95?% CI?=?2.014–2.397). Future intervention programs for adolescents should focus on overcoming high-risk behaviors and sustain behavioral changes.