Comparing Five Generations of ActiGraph Devices using an Orbital Shaker.

Introduction: ActiGraph accelerometers are used extensively to objectively assess physical activity, sedentary behavior, and sleep. Here, we present an objective validation of five generations of ActiGraph sensors to characterize potential differences in output arising from changes to hardware or firmware.

Methods: An orbital shaker generated accelerations from 0 to 3700 milli-g in a randomized order to test the wGT3X-BT, GT9X, CentrePoint Insight Watch (CPIW) 1.

Carbohydrate supplementation maintains physical performance during short-term energy deficit despite reductions in exogenous glucose oxidation.

Exogenous glucose oxidation is reduced 55% during aerobic exercise after three days of complete starvation. Whether energy deficits more commonly experienced by athletes and military personnel similarly affect exogenous glucose oxidation and what impact this has on physical performance remains undetermined. This randomized, longitudinal parallel study aimed to assess the effects of varying magnitudes of energy deficit (DEF) on exogenous glucoseoxidation and physical performance compared to energy balance (BAL).

Longitudinal changes in psychological, physiological, and nutritional measures and predictors of success in Special Forces training.

The mentally and physically challenging 19-20 day, multi-stressor US Army Special Forces Assessment and Selection (SFAS) course selects soldiers for Army Special Forces (SF) training. If selected, candidates enroll for advanced training in the 2-year Special Forces Qualification Course (SFQC) to qualify for the SF. This longitudinal study examined physiological, psychological, and nutritional status of soldiers before (pre-SFAS) and after SFAS (post-SFAS), and post-SFQC, to identify predictors of graduation from SFQC.

Improved Diet Quality in Elite and Entry-Level Military Women Compared With Civilian-Matched Counterparts.

Background: Dietary intake is a modifiable factor linked to short-term and long-term health. The Healthy Eating Index (HEI) is an objective measure to assess diet quality and population-level comparisons, like military to civilian.

Objectives: This study aimed to characterize diet quality of early-career and mid-career female soldiers compared with that of age-matches and sex-matched civilians and to link indicators of cardiometabolic disease risk to dietary outcomes and health status.

An update on beverage consumption patterns and caffeine intakes in a representative sample of the US population.

Caffeine is a popular stimulant, predominantly consumed from beverages. The caffeinated beverage marketplace is continually evolving resulting in considerable interest in understanding the impact caffeinated beverages have on levels of intakes. Therefore, estimates of caffeine intakes in the U.

Effects of short-term, high-dose cocoa-derived flavanol supplementation on gut microbiota composition: secondary findings from a randomized, double-blind, placebo-controlled crossover study.

Cocoa-derived flavanols (CDF) may act as prebiotics. However, evidence is inconsistent, and the duration and dose of CDF intake needed to elicit any prebiotic effect are undefined. This randomized, double-blind, crossover study determined the effects of short-term, high-dose dietary supplementation with CDF versus matched placebo on gut microbiota composition in 8 healthy adults.

Does a priming warm-up influence the incidence of [Formula: see text] during a ramp test and verification phase?

Objective: This study compared the effects of two different warm-up protocols (normal vs. priming) on the oxygen plateau ([Formula: see text]) incidence rate during a ramp test. It also compared the cardiopulmonary responses during the ramp test and subsequent verification phase.

US Army Accession and Retention Standards: Impact on Obesity and Medical Readiness.

Introduction: Military body fat standards were implemented in the 1980s to prevent obesity and associated poor military readiness. In the past 2 decades, enforcement of existing Army body composition standards has been eroded by the steady increase in national obesity rates, the demand for new recruits especially during the 2007 surge in Iraq, and the COVID epidemic in 2020. The diminishing qualified recruit pool puts a new focus on accession standards.

International society of sports nutrition position stand: β-hydroxy-β-methylbutyrate (HMB).

Position Statement: The International Society of Sports Nutrition (ISSN) bases the following position stand on an analysis of the literature regarding the effects of β-Hydroxy-β-Methylbutyrate (HMB). The following 12 points have been approved by the Research Committee of the Society: 1. HMB is a metabolite of the amino acid leucine that is naturally produced in both humans and other animals.

Reliability, biological variability, and accuracy of multi-frequency bioelectrical impedance analysis for measuring body composition components.

Introduction: Bioelectrical impedance analysis (BIA) systems are gaining popularity for use in research and fitness assessments as the technology improves and becomes more affordable and easier to use. Multifrequency BIA (MF-BIA) may improve accuracy and precision using octopolar contacts for segmental analyses.

Purpose: Evaluate reliability, biological variability, and accuracy of component measures (total body water, mass, and composition) of commercially available MF-BIA system (InBody 770, Cerritos, California, USA).

Depression is associated with lower diet quality in both pre- and post-menopausal U.S. women: NHANES 2007-2018.

Depression has been associated with adverse diet-related outcomes and women are particularly vulnerable to depression around the menopause transition. Therefore, we hypothesized that depression and postmenopausal status would be associated with lower diet quality, and that depression would be associated with lower diet quality in both pre- and post-menopausal women, but that the association would be stronger in postmenopausal women. Data from 5,634 nonpregnant women age > 20 years from the National Health and Nutrition Examination Survey from 2007-2018 were analyzed.

Low Carbohydrate Availability Promotes a Distinct Circulating microRNA Profile 24 Hours Following Aerobic Exercise.

Low carbohydrate availability during recovery from aerobic exercise alters skeletal muscle microRNA (miRNA) profiles, which may mechanistically regulate exercise recovery. However, its impact on circulating miRNA (c-miRNA) profiles remains unclear. This study aimed to determine the effects of low versus adequate carbohydrate availability on c-miRNA profiles during recovery from aerobic exercise.

Home Use Therapies for Pain, Disability, and Quality of Life in Military Service Members with a Musculoskeletal Injury: An Updated Systematic Review Meta-Analysis.

Introduction: Musculoskeletal (MSK) injury can negatively affect service members by compromising job performance and readiness. These injuries can impact the service member's physical health, functional abilities, and quality of life (QoL). Rehabilitation therapies for MSK injuries can reduce these impacts.

Sinusitis and rhinitis among US veterans deployed to Southwest Asia and Afghanistan after September 11, 2001.

Background: Post-9/11 veterans were exposed to environmental and occupational pollutants during deployment.

Objective: Our aim was to determine associations between deployment-related exposures and sinusitis and rhinitis.

Methods: Between April 2018 and March 2020, veterans with land-based deployment after 9/11 who were living within 25 miles of 6 Department of Veteran Affairs medical centers were randomly chosen by using a Defense Manpower Data Center roster.

Methodology used to develop the minimum common data elements for surveillance and Reporting of Musculoskeletal Injuries in the MILitary (ROMMIL) statement.

Background: The objective was to summarize the methodology used to reach consensus for recommended minimum data elements that should be collected and reported when conducting injury surveillance research in military settings. This paper summarizes the methodology used to develop the international Minimum Data Elements for surveillance and Reporting of Musculoskeletal Injuries in the MILitary (ROMMIL) statement.

Methods: A Delphi methodology was employed to reach consensus for minimum reporting elements.

Dietary Intake and Diet Quality of Female and Male NCAA Division I Cross Country Runners from a Single University.

Background: Collegiate student-athletes have unique nutritional requirements to support their athletic performance and health. Few studies have comprehensively characterized the diets of National Collegiate Athletic Association (NCAA) Division I student-athletes.

Objectives: To characterize dietary intake and diet quality during a competitive season in female and male NCAA Division I cross country student-athletes from a single university.

Perceived barriers and facilitators to implementation of injury prevention programs in the military: Feedback from inside the trenches.

Background: Musculoskeletal injuries enact a substantial burden in military settings, incurring high costs, long-term disability, and impacting military readiness. This has led to a prioritization of injury prevention programs. Understanding the challenges faced by those trying to implement these programs could help standardize and better inform future efforts.

Symptoms of depression, but not PTSD, influence cognitive performance in healthy Army National Guard Soldiers.

Introduction: Research suggests that comorbid depression and PTSD may contribute to cognitive impairment. However, few studies have explored this dynamic in military personnel who report only subclinical symptoms of PTSD and depression.

Methods: Army National Guard Soldiers (ARNG; N = 1415) completed the Automated Neuropsychological Assessment Metrics (ANAM), the PTSD Checklist (PCL), and the Center for Epidemiological Studies Depression Scale (CES-D).

The impact of a 20-h rotating watch schedule on cognitive and mood states in submarine operations.

This is the first study to provide valuable insights into the effects of the Israeli Navy's 20-h rotating watch schedule on submariners' alertness, mood states, risk-taking behaviours, and sleep. Specifically, we assessed the impact of the non-circadian-aligned schedule on cognitive performance, mood, and behavioural outcomes in a highly controlled submarine environment. A total of 20 male submariners participated in an at-sea mission, where their cognitive performance, mood states, risk-taking propensity, and caffeine consumption were measured.

Validation of livability environmental limits to heat and humidity.

Rising global temperatures, driven by climate change, pose a threat to human health and regional livability. Empirical data and biophysical model-derived estimates suggest that the critical environmental limits (CELs) for livability are dependent on ambient temperature and humidity. We use a well-validated, physiology-based, six-cylinder thermoregulatory model (SCTM) to independently derive CELs during sustained minimal, light, and moderate activity across a broad range of ambient temperatures and humidity levels and compare with published data.

Likelihood of fitness improvements during a standardised physical fitness programme in US Army trainees of different fitness levels.

Unlabelled: IntroductionUS Army Initial Entry Training (IET) aims to develop general fitness and conditioning among large groups of trainees. Despite group mean improvement in physical fitness during IET, some trainees experience substantial gains and others experience no improvement or even declines in fitness. The purpose of this study was to examine the associations between trainee baseline fitness (Army Physical Fitness Test (APFT), the primary fitness assessment at the time of data collection) or estimated baseline body fat (%BF) and the change in fitness by the end of IET.

A review of current and proposed behavioral nudge strategies to improve the readiness of the United States military.

This review discusses findings on the use of behavioral nudges in both the Canadian and U.S. military.

Physical training augmented with whole body electronic muscle stimulation favorably impacts cardiovascular biomarkers in healthy adults - A pilot randomized controlled trial.

Background: Physical activity is protective against cardiovascular disease (CVD) and favorably improves CVD risk profile. However, more than 25 % of American adults report no participation in physical activity. Whole body electronic muscle stimulation (WB-EMS) training is a novel FDA-cleared technology which offers a time-efficient and adaptable method for physical training by simultaneously stimulating the main muscle groups using percutaneous electrical impulse transmission.