Clinically feasible dual-task detects residual post-concussion deficits after return-to-play.

Dual-task (DT) has been shown to detect post-concussion deficits even after traditional measures returned to normal. However, previous studies were conducted in laboratory settings that were not feasible in the clinical setting. Prospective Cohort Study.

Hawaiian High School Football Player Positional Differences in Helmet Impact Characteristics.

Context: The importance of analyzing head impact exposure among football players is well established, yet few studies have explored the differences across position groups in high school athletes. Better understanding of these differences may provide optimized intervention strategies for coaches and healthcare providers.

Objective: To quantify the difference of head impacts per exposure (Imp/E) and impact burden high school football player position groups.

Single-Task and Dual-Task Gait Performance After Sport-Related Concussion: A Machine Learning Statistical Approach.

Background: This study evaluated 2 different dual-task (DT) conditions during tandem gait (TG) to predict sport-related concussion (SRC) diagnosis.

Hypothesis: The best (fastest) single-task (ST) gait will differ between groups (controls vs SRC; baseline vs SRC), with auditory pure switching task (APST) response rate being the most important behavioral variable to aid prediction of SRC.

Study Design: Cohort design.

Helmetless Tackling Training Intervention and Preseason Self-efficacy Effects on Head Impacts in Hawai'i High School Football.

Objective: To determine how football head impacts are influenced by self-efficacy (SE), helmetless tackling intervention participation (IP), and years of experience (YE) playing football.

Design: Cross-sectional.

Setting: Three high schools.

Test-Retest Reliability of Movement Displacement during a 20-s Stepping-in-Place Test in Community-Dwelling Older Adults with and without Supportive Care.

Introduction: Our recent reports have shown that movement pattern and displacement assessed with an infrared depth sensor during a 20-s stepping-in-place test (ST) correlates with measures of balance and need for assistance in older individuals. This study investigated ST test-retest reliability in community-dwelling older adults with and without supportive care.

Methods: Two groups were included: those not participating (HO: n = 25, 74.

Maximal Running Speed and Critical Speed Are Positively Related to Phase Angle in Healthy Young Adults.

Phase Angle (PhA), derived from bioelectrical impedance analysis, is a measurement of cellular resistance to electrical current and a non-invasive tool to monitor neuromuscular performance. The relationship between PhA and components of athletic performance is not fully understood. The purpose of this study was to determine if maximal running speed, critical speed (CS), and/or D prime (D') derived from a 3-minute all-out-test (3MAOT) correlates to PhA, reactance (Xc), or resistance (R).

Stance Time and Impact Loading Rates are Significant Predictors of Critical Speed During a 3-Minute All-Out Running Test.

The addition of wearable technology during a 3-minute all-out overground running test (3MAOT) could provide additional insights to guide training and coaching strategies. The purpose of this study was to explore the relationships between critical speed (CS) and biomechanical parameters (cadence, stride length, vertical oscillation, stance time, form power, leg spring stiffness, and impact loading rate), and changes in biomechanical parameters throughout the 3MAOT. Sixty-three (male, n=37, female, n=26) recreationally active college-aged (23.

Head Impact Exposure in Hawaiian High School Football: Influence of Adherence Rates on a Helmetless Tackling and Blocking Training Intervention.

Context: High school football remains a popular, physically demanding sport despite the known risks for acute brain and neck injury. Impacts to the head also raise concerns about their cumulative effects and long-term health consequences.

Objective: To examine the effectiveness of a helmetless tackling training program to reduce head impact exposure in football participants.

Advances in digital anthropometric body composition assessment: neural network algorithm prediction of appendicular lean mass.

Currently available anthropometric body composition prediction equations were often developed on small participant samples, included only several measured predictor variables, or were prepared using conventional statistical regression methods. Machine learning approaches are increasingly publicly available and have key advantages over statistical modeling methods when developing prediction algorithms on large datasets with multiple complex covariates. This study aimed to test the feasibility of predicting DXA-measured appendicular lean mass (ALM) with a neural network (NN) algorithm developed on a sample of 576 participants using 10 demographic (sex, age, 7 ethnic groupings) and 43 anthropometric dimensions generated with a 3D optical scanner.

Assessing Concussion Knowledge Among Recreational Surfers and Comparing Results to Concussion Knowledge Among Soccer Players: A Pilot Study.

Concussions are caused by physical trauma to the head, face, or neck and can be sustained while surfing, increasing the risk of drowning. The purpose of this pilot study was to establish a preliminary assessment of concussion knowledge in a group of adult recreational surfers. Using the standardized Concussion Knowledge Index, an anonymous survey was conducted with 55 surfers.

Increasing Trunk Mass Evokes Lower Extremity Biomechanical Plasticity during Stair Descent.

The purpose of this study was to investigate the influence of simulated changes in body mass on lower extremity joint work and relative joint contributions during stair descent. Ten healthy recreationally active college-age participants performed five stair descent trials in each of five loading conditions: no added load and with an additional 5%, 10%, 15% and 20% of their body weight. Three-dimensional ankle, knee and hip joint powers were calculated using a six degree-of-freedom model in Visual3D (C-Motion Inc.

TEST-RETEST RELIABILITY AND RELIABLE CHANGE INDEX OF MOBILE APPLICATION NEUROCOGNITIVE TEST AMONG MIDDLE AND HIGH SCHOOL ATHLETES.

Context: A mobile application neurocognitive assessment has been used in place of equipment intensive computerized neurocognitive assessment protocol. A previous study reported high to very high test-retest reliability of neurocognitive assessment using the mobile application in healthy adults, but no studies have examined test-retest reliability, reliable change indices (RCIs), and sex effect in middle school and high school populations when conducted 1 year apart.

Objective: The purpose of this study was to examine the test-retest reliability and RCIs of baseline data collected at 2-time points approximately 1 year apart using a mobile application neurocognitive rest in middle school and high school athletes.

Population-based normative data and language effects of the Immediate Post-Concussion Assessmentand Cognitive Testing (ImPACT).

Objective: When test results are interpreted based on the norms of the U.S. population, misdiagnoses of neurocognitive impairment could occur with subgroups of individuals whose demographic characteristics differ from the overall population.

ACTIVE YOU: Teacher Attributes and Attitudes Predicting Physical Activity Promotion.

Background: Based on the Health Belief Model, this study examined preservice teacher attributes and attitudes toward providing physical activity opportunities for children in school.

Methods: A quasi-experimental design was used to collect proof of concept and feasibility data for the ACTIVE YOU intervention as part of teacher education.

Conclusions: Examination of a diverse sample of preservice teachers during their fieldwork revealed that those who engage in healthy behaviors and had positive attitudes toward physical activity in schools are more likely to take action and promote physical activity for their students.

Monitoring body composition change for intervention studies with advancing 3D optical imaging technology in comparison to dual-energy X-ray absorptiometry.

Background: Recent 3-dimensional optical (3DO) imaging advancements have provided more accessible, affordable, and self-operating opportunities for assessing body composition. 3DO is accurate and precise in clinical measures made by DXA. However, the sensitivity for monitoring body composition change over time with 3DO body shape imaging is unknown.

Believe in You student empowerment program: A pilot study.

Introduction: The social and emotional health of youth is important, especially after students experience the COVID-19 pandemic. The purpose of this study was to understand the influence that the had on students social emotional learning (SEL) behaviors over a 10 week period during the COVID-19 pandemic.

Materials And Methods: A part of this quantitative study, one school in each the intervention and the control group (delayed intervention; 2 schools total) participated in the study.

Preoperative and Postoperative Walking Gait in Women With Acetabular Labral Tears and Femoroacetabular Impingement Syndrome.

Context: Symptomatic femoroacetabular impingement syndrome (FAIS) is a painful condition that leads to decreased function. How walking gait changes over time within the first year after surgery for FAIS and how these changes present in women are currently unknown.

Objective: To determine biomechanical gait differences between women with FAIS or labral tears and control individuals preoperatively and at 3 and 6 months postoperatively.

Predicting the Presence of Active Schools: A National Survey of School Principals in the United States.

Background: Principals are key to the promotion of physical activity (PA) in schools. The purpose of this study was to understand how school principals' PA values, behaviors, and individual and school characteristics were associated with the presence of an active school.

Methods: A representative sample of 1019 school principals in the United States was surveyed.

Comprehensive school health: teachers' perceptions and implementation of classroom physical activity breaks in US schools.

Modifications to the social-ecological model, such as Whole School, Whole Community, Whole Child (WSCC) frameworks, have been utilized in comprehensive school health interventions. Classroom physical activity breaks are used when implementing whole-of-school approaches. However, the onus to implement classroom physical activity breaks is on school stakeholders.