The relationship between physical activity, stress, and resilience in sexual and gender minority college students.

Objective: To assess the role of sexual orientation and gender identity in the relationship between physical activity (PA), stress and resilience.

Participants: A nationally-representative sample of students ( = 91,718) from United States postsecondary institutions.

Methods: Students reported aerobic and strength training (ST) behaviors, stress, resilience, gender identity and sexual orientation.

Gender differences in stress, resilience, and physical activity during the COVID-19 pandemic.

To evaluate gender differences in physical activity (PA), stress and resiliency during the COVID-19 pandemic. Students ( = 300) at a southeastern US university. Perceived Stress (PSS), Resiliency (BRS), Life Events (LEI), and PA were recorded via online survey in Summer 2020.

A first look at perceived stress in southeastern university students during the COVID-19 pandemic.

Shelter-in-place and social distancing reduce the risk of infection spread, but evidence is appearing to support an unintentional spread of negative mental health effects. The aim of this study was to assess perceived stress in a sample of undergraduate students reflecting upon Spring 2020. Undergraduate students (N = 312, 75% female, 88% white) completed an online survey assessing demographic information and stress assessed via Cohen's Perceived Stress Scale.

Development, Applications, and Refinement of the Family Nutrition and Physical Activity (FNPA) Child Obesity Prevention Screening.

Concerns regarding the continued high prevalence of childhood overweight and obesity have created a need for proactive approaches to behavior change. The Family Nutrition and Physical Activity (FNPA) screening tool was developed for research and clinical use to identify home environments and behaviors that could predispose youth to increased weight. FNPA scores have been shown to correlate with body mass index (BMI) percentiles in first-grade students and to predict unique variance in change in BMI percentiles from first to second grade.

Evaluating Motivational Interviewing and Habit Formation to Enhance the Effect of Activity Trackers on Healthy Adults' Activity Levels: Randomized Intervention.

Background: While widely used and endorsed, there is limited evidence supporting the benefits of activity trackers for increasing physical activity; these devices may be more effective when combined with additional strategies that promote sustained behavior change like motivational interviewing (MI) and habit development.

Objective: This study aims to determine the utility of wearable activity trackers alone or in combination with these behavior change strategies for promoting improvements in active and sedentary behaviors.

Methods: A sample of 91 adults (48/91 female, 53%) was randomized to receive a Fitbit Charge alone or in combination with MI and habit education for 12 weeks.

Comparison of In-Person and Online Motivational Interviewing-Based Health Coaching.

Health coaching is a common approach for promoting lifestyle changes, but little is known about the effectiveness of different delivery methods. The purpose of this study was to evaluate the effectiveness of in-person versus online health coaching when used as part of a facilitated behavior change program. To increase translatability, the study used a naturalistic design that enabled participants to self-select the coaching delivery method (Group) as well as the target behavior (diet, physical activity, or weight management).

Locomotion pattern and foot pressure adjustments during gentle turns in healthy subjects.

People suffering from locomotor impairment find turning manoeuvres more challenging than straight-ahead walking. Turning manoeuvres are estimated to comprise a substantial proportion of steps taken daily, yet research has predominantly focused on straight-line walking, meaning that the basic kinetic, kinematic and foot pressure adaptations required for turning are not as well understood. We investigated how healthy subjects adapt their locomotion patterns to accommodate walking along a gently curved trajectory (radius 2.

Construct Validity of an Obesity Risk Screening Tool in Two Age Groups.

Home environment influences child health, but the impact varies as children move into adolescence. The Family Nutrition and Physical Activity (FNPA) screening tool has been used to evaluate home environments, but studies have not compared the utility of the tool in different age groups. The purpose of this study was to examine the efficacy of the FNPA tool in first and tenth grade samples.

Comparative effectiveness of guided weight loss and physical activity monitoring for weight loss and metabolic risks: A pilot study.

Many consumer-based physical activity monitors (PAMs) are available but it is not clear how to use them to most effectively promote weight loss. The purpose of this pilot study was to compare the effectiveness of a personal PAM, a guided weight loss program (GWL), and the combination of these approaches on weight loss and metabolic risk. Participants completed the study in two cohorts: Fall 2010 and Spring 2011.

Effects of Enhancing School-Based Body Mass Index Screening Reports with Parent Education on Report Utility and Parental Intent To Modify Obesity Risk Factors.

Background: School-based body mass index screenings (SBMIS) have been controversial. We aimed to determine if parents would indicate improved utility with SBMIS when the report included parent education and whether parental intent to modify obesity risk factors would vary with report type or child weight.

Methods: A cluster-controlled trial was conducted with 31 elementary schools randomized to distribute a standard SBMIS report or the standard report plus education (SBMIS+).

Energy Cost of Children's Structured and Unstructured Games.

Background: Limited data are available on energy cost of common children's games using measured oxygen consumption.

Methods: Children (10.6 ± 2.

Relationships between County Health Rankings and child overweight and obesity prevalence: a serial cross-sectional analysis.

Background: The County Health Rankings (CHR) system provides health rankings for U.S. counties.

Subject-specific body segment parameter estimation using 3D photogrammetry with multiple cameras.

Inertial properties of body segments, such as mass, centre of mass or moments of inertia, are important parameters when studying movements of the human body. However, these quantities are not directly measurable. Current approaches include using regression models which have limited accuracy: geometric models with lengthy measuring procedures or acquiring and post-processing MRI scans of participants.

Shape-switching microrobots for medical applications: the influence of shape in drug delivery and locomotion.

The effect of dynamic shape switching of hydrogel bilayers on the performance of self-folding microrobots is investigated for navigation in body orifices and drug release on demand. Tubular microrobots are fabricated by coupling a thermoresponsive hydrogel nanocomposite with a poly(ethylene glycol)diacrylate (PEGDA) layer, to achieve spontaneous and reversible folding from a planar rectangular structure. Graphene oxide (GO) or silica-coated superparamagnetic iron oxide nanoparticles are dispersed in the thermoresponsive hydrogel matrix to provide near-infrared (NIR) light sensitivity or magnetic actuation, respectively.

Factors associated with parent concern for child weight and parenting behaviors.

Background: A parent's perception about their child's overweight status is an important precursor or determinant of preventative actions. Acknowledgment of, and concern for, overweight may be moderated by the parent's own weight status whereas engaging in healthy behaviors at home may promote healthy weight status. It is hypothesized that normal weight parents are more likely to engage in healthy behaviors and acknowledge overweight in their own children whereas heavier parents may report more concern about child weight.

Magnetic polymer composite artificial bacterial flagella.

Artificial bacterial flagella (ABFs) are magnetically actuated swimming microrobots inspired by Escherichia coli bacteria, which use a helical tail for propulsion. The ABFs presented are fabricated from a magnetic polymer composite (MPC) containing iron-oxide nanoparticles embedded in an SU-8 polymer that is shaped into a helix by direct laser writing. The paper discusses the swim performance of MPC ABFs fabricated with varying helicity angles.

Physical activity during pregnancy and offspring characteristics at 8-10 years.

Aim: We evaluated relationships between mothers' physical activity (PA) during pregnancy and child blood pressure, aerobic fitness, and birth weight.

Methods: Anthropometrics, systolic (SBP) and diastolic (DBP) blood pressures, and aerobic fitness were measured on 20 mother/child pairs, 8-10 years postpartum. Pregnancy PA (kJ/kg.

Micro- and nanorobots swimming in heterogeneous liquids.

Essentially all experimental investigations of swimming micro- and nanorobots have focused on swimming in homogeneous Newtonian liquids. In this issue of ACS Nano, Schamel et al. investigate the actuation of "nanopropellers" in a viscoelastic biological gel that illustrates the importance of the size of the nanostructure relative to the gel mesh size.

Noncytotoxic artificial bacterial flagella fabricated from biocompatible ORMOCOMP and iron coating.

Magnetic microrobots have potential use in biomedical applications such as minimally invasive surgery, targeted diagnosis and therapy. Inspired by nature, artificial bacterial flagella (ABFs) are a form of microrobot powered by magnetic helical propulsion. For the promise of ABFs to be realized, issues of biocompatibility must be addressed and the materials used in their fabrication should be carefully considered.

Hybrid helical magnetic microrobots obtained by 3D template-assisted electrodeposition.

Hybrid helical magnetic microrobots are achieved by sequential electrodeposition of a CoNi alloy and PPy inside a photoresist template patterned by 3D laser lithography. A controlled actuation of the microrobots by a rotating magnetic field is demonstrated in a fluidic environment.

Assembly, disassembly, and anomalous propulsion of microscopic helices.

Controlling the motion of small objects in suspensions wirelessly is of fundamental interest and has potential applications in biomedicine for drug delivery and micromanipulation of small structures. Here we show that magnetic helical microstructures that propel themselves in the presence of rotating weak magnetic fields assemble into various configurations that exhibit locomotion and a change in swimming direction. The configuration is tuned dynamically, that is, assembly and disassembly occur, by the field input.

Superparamagnetic microrobots: fabrication by two-photon polymerization and biocompatibility.

This work presents the fabrication and controlled actuation of swimming microrobots made of a magnetic polymer composite (MPC) consisting of 11-nm-diameter magnetite (Fe3O4) nanoparticles and photocurable resin (SU-8). Two-photon polymerization (TPP) is used to fabricate the magnetic microstructures. The material properties and the cytotoxicity of the MPC with different nanoparticle concentrations are characterized.

Magnetic helical micromachines.

Helical microrobots have the potential to be used in a variety of application areas, such as in medical procedures, cell biology, or lab-on-a-chip. They are powered and steered wirelessly using low-strength rotating magnetic fields. The helical shape of the device allows propulsion through numerous types of materials and fluids, from tissue to different types of bodily fluids.

Bio-inspired magnetic swimming microrobots for biomedical applications.

Microrobots have been proposed for future biomedical applications in which they are able to navigate in viscous fluidic environments. Nature has inspired numerous microrobotic locomotion designs, which are suitable for propulsion generation at low Reynolds numbers. This article reviews the various swimming methods with particular focus on helical propulsion inspired by E.