The Influence of Motor Competence on Broader Aspects of Health: A Systematic Review of the Longitudinal Associations Between Motor Competence and Cognitive and Social-Emotional Outcomes.

BACKGROUND: Motor competence has important developmental associations with aspects of physical health, but there has been no synthesis of longitudinal associations with cognitive and social-emotional health. OBJECTIVES: The first aim was to present a conceptual model that positions motor competence as a mediator between physical activity and cognitive and social-emotional outcomes. The second aim was to synthesize the association of motor competence and cognitive and social-emotional development using longitudinal observational and experimental evidence, in particular to (i) identify the role of task, individual, and environmental characteristics in moderating the association between motor and cognitive and social-emotional outcomes and (ii) synthesize the strength of evidence pertaining to domain-specific relationships. METHODS: This systematic review was registered with the International Prospective Register of Systematic Reviews (PROSPERO) and adhered to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement for reporting systematic reviews and meta-analyses. Five electronic databases (PubMed, Web of Science, Scopus, PsycINFO, and SPORTDiscus) were systematically searched. Following study screening and risk-of-bias assessment by two authors, 49 eligible studies were identified for inclusion and grouped by study design. Evidence for domain-specific paths between motor competence and cognitive and social-emotional outcomes was synthesized by calculating the significant analyses in the hypothesized direction, divided by the total number of analyses for that path. These percentages were then collated for each domain outcome. This collated influence was classified as either no association (0-33%), written as '0', or indeterminate/inconsistent (34-59%), written as '?' If there were fewer than three studies in the domain, the strength of evidence was classified as insufficient (I). RESULTS: Of the 49 studies, 35% were able to satisfy six or more of the seven risk-of-bias criteria. Longitudinal observational evidence about domain-specific and global associations of motor competence and cognitive and social-emotional development is indeterminate. The included studies also did not provide evidence for a consistent moderating role of age and sex. Some preliminary experimental evidence does support the role of motor competence in moderating the influence of cognitively enriched physical activity on cognitive outcomes, especially working memory and social-emotional skills. However, too few studies were appropriately designed to acknowledge the moderating role of contextual mechanisms. CONCLUSIONS: Between-study heterogeneity means it was not possible to identify definitive domain- and construct-specific relationships between motor competence and cognitive and social-emotional outcomes. To further develop our understanding, it is important that researchers acknowledge the complexity of these relationships within rigorous study designs.

Martial arts, combat sports, and mental health in adults: A systematic review.

Martial arts (MA) and combat sports (CS) are physical activities that may be associated with health-related outcomes. The aim of this systematic review was to synthesize and evaluate the available evidence on the relationship between MA and CS training and mental health of adult practitioners (≥18 years). CochraneLibrary, EBSCOhost, Web-of-Science, and Scopus databases were searched up to September 2022 for measures of self-related constructs, ill-being and well-being, cognition and brain structure/function, in adult MA/CS practitioners. Seventy cross-sectional and two longitudinal studies were retained and submitted to risk of bias assessments through an adapted version of the Cochrane Collaboration's Tool. Associations between MA/CS practice and self-related constructs were inconclusive for both consistency and strength of evidence. Limited evidence of significant associations emerged for sub-domains of ill-being (i.e., externalizing and internalizing emotion regulation), and well-being. In regard to cognitive and brain structural/functional variables, evidence of positive association with MA/CS practice was consistent with respect to perceptual and inhibition abilities but limited with respect to attention and memory. Evidence on negative associations of boxing with changes of brain structure integrity due to concussions was also inconclusive. Functional imaging techniques could shed light onto brain activation mechanisms underlying complex cognitive performance. In relation to moderators, mixed results were found for activity exposure, expertise, level of competitive engagement (which often covary with the length of training) and sex and type of MA/CS. The MA/CS' multifaceted nature may produce different, sometimes conflicting outcomes on mental health. Studies on MA/CS represent a flourishing research area needing extensive improvement in theoretical and practical approaches.

Physical Activity and Children's Episodic Memory: A Meta-Analysis.

PURPOSE: The purpose of this review was to evaluate the effects of physical activity on children's free recall, cued recall, and recognition episodic memory and to explore potential moderating factors. METHODS: The following databases were searched: PubMed, ERIC, APA Psych Info, CINHAL, SPORTDiscus, and Google Scholar. Studies were included if: (1) participants were aged 4-18 years, (2) participants were typically developed, (3) participants were randomized to groups, (4) interventions employed gross movements, (5) sedentary group was used for control, (6) memory tests were quantitative, and (7) employed acute or chronic intervention. RESULTS: 14 studies met inclusion criteria resulting in the analysis of data from 7 free recall, 7 cued recall, and 8 recognition memory tests. Physical activity was found to have a positive influence on tests free (g = 0.56), cued recall (g = 0.67), and no influence on tests of recognition (g = 0.06). While some moderator analyses were significant, the authors do not consider these results to be meaningful in application. CONCLUSIONS: The effects of acute and chronic physical activity enhance specific aspects of long-term episodic memory. These findings suggest physical activity interventions developed for children may be expected to benefit some, but not all, types of memory processing.

The effects of physical activity timing and complexity on episodic memory: A randomized controlled trial.

The role of two types of acute physical activity (PA) bouts were assessed on young adults' free-recall and recognition memory in two experiments, which differed in the temporal relation of PA and word encoding. Before or following training on the Rey Auditory Verbal Learning Task, participants performed a simple two-step dance, a complex four-step dance, or remained seated. Hypotheses proposed that PA prior to encoding and complex PA would enhance PA's mnemonic benefits. Memory assessed post-PA, 24 h, and 7 days after training indicated that timing and complexity of PA did not impact free-recall or recognition memory. Findings differ from a previous study showing complex PA benefited motor learning more than simple PA (Tomporowski & Pendleton, 2018). The inconsistency may be due to different working memory processes underlying consolidation and retrieval of procedural or episodic information. Theory-based explanations regarding memory storage and retrieval are proposed to elucidate this selective process.

Holistic Functioning from a Developmental Perspective: A New Synthesis with a Focus on a Multi-tiered System Support Structure.

While research in specific academic disciplines has individually advanced knowledge and practice for promoting multiple aspects of health and well-being in children and adolescents, still missing is an understanding of the interconnectedness of many critical aspects of development and how to intentionally weave these factors to advance a more holistic approach. The need for a more holistic and inclusive approach to child and adolescent development is increasingly evident to promote long-term health and well-being as the overall percentage of children, adolescents, and adults who suffer from mental health disorders is increasing. To address this issue, our authorship team consists of researchers in the areas of developmental psychology, neuroscience, motor development, exercise science, and mental health. The collective ideas outlined in this paper are aligned to address the need to remove disciplinary-specific boundaries and elucidate synergistic linkages across multiple research domains that support holistic development and lifespan health and wellness. We propose a conceptual framework that comprehensively addresses the integration of physical, cognitive, psychological, social, and emotional domains of child and adolescent development. In addition, we also provide a holistic preventative approach that is aligned with a contemporary intervention structure (i.e., Multi-tiered Systems of Support) to promote, from a developmental perspective, positive trajectories of health and well-being across childhood and adolescence.

Effects of acute exercise on memory: Considerations of exercise intensity, post-exercise recovery period and aerobic endurance.

Accumulating research demonstrates that acute exercise can enhance long-term episodic memory. However, it is unclear if there is an intensity-specific effect of acute exercise on long-term episodic memory function and whether this is influenced by the post-exercise recovery period, which was the primary objective of this experiment. Another uncertainty in the literature is whether aerobic endurance influences the interaction between exercise intensity and post-exercise recovery period on long-term episodic memory function, which was a secondary objective of this study. With exercise intensity and post-exercise recovery period occurring as within-subject factors, and fitness as a between-subject factor, 59 participants (Mage = 20 years) completed 12 primary laboratory visits. These visits included a 20-min bout of exercise (Control, Moderate, and Vigorous), followed by a recovery period (1, 5, 10, and 15 min) and then a word-list episodic memory task, involving an encoding phase and two long-term recall assessments (20-min and 24-h delayed recall). The primary finding from this experiment was that moderate and vigorous-intensity exercise improved memory function when compared to a non-exercise control. A secondary finding was that individuals with higher levels of aerobic endurance, compared to their lesser fit counterparts, had greater memory performance after exercise (moderate or vigorous) when compared to after a control condition. Additionally, individuals with higher levels of aerobic endurance, compared to their lesser fit counterparts, generally performed better on the memory task with longer post-exercise recovery periods. Future research should carefully consider these parameters when evaluating the effects of acute exercise on long-term episodic memory.

Masculinity, optimism bias, and perceived pressure from stakeholders influence on student-athlete concussion reporting intentions and behavior.

Objective: Determine how a) masculinity, b) optimism bias, and c) perceived pressure from stakeholders predict concussion reporting intentions and behavior. Participants: Collegiate student-athletes (n = 369). Methods: Student-athletes completed surveys of Conformity to Masculine Norms Inventory-46 (nine sections), optimism bias (optimist, neutral, pessimist), perceived pressure from stakeholders (six stakeholder sections), reporting intentions (symptom and concussion), and behavior (symptom and concussion). Four separate stepwise multivariate regression analyses were conducted. Results: A one-point increase in playboy, heterosexual self-preservation, being neutral or optimist compared to a pessimist symptom reporting intention decreased. A one-point increase in sport primacy, perceived pressure from athletic administration, being neutral or optimist compared to pessimist concussion reporting intentions increased 0.05, and decreased 0.23, 0.35, and 0.32, respectively. A one-point increase in violence and playboy increased the odds of being a "non-reporter" by 30% and 40%. Conclusions: Pessimistic views regarding concussion risks may result in greater concussion reporting intentions, however these findings did not influence behavior.

Virtual reality-based distraction on pain, performance, and anxiety during and after moderate-vigorous intensity cycling.

PURPOSE: To determine whether increased visual perceptual load (PL) within an immersive virtual environment may help explain previously shown pain-relieving effects of virtual reality (VR) during high intensity cycling. METHODS: Using a within-subjects design, participants cycled at a perceptually "hard" intensity for 10 min on three separate occasions. The first session did not use VR (i.e., no perceptual load - NPL). Subsequent sessions employed VR during cycling with either a low or high perceptual load (LPL or HPL). Quadriceps pain intensity (PI) was reported by participants throughout cycling. RESULTS: Data were analyzed for 43 healthy participants (20 females, mean age 21  [SD 1.4]). For PI, ANOVA showed there were significant main effects of condition (F = 13.458, df =1.579, 66.334, p<0.001) and time (F = 113.045, df =1.618, 227.683, p<0.001). At every time point, t-tests revealed mean PI was significantly lower in the NPL than in the LPL condition (t(42)=4.737, p<0.001, d = 0.472) and HPL condition (t(42)=3.380, p = 0.002, d = 0.391). Dependent t-tests showed that more work (kilojoules) was performed during the LPL condition than the NPL (t(42)=2.992, p = 0.005) and HPL (t(42)=5.810, p<0.001) conditions. CONCLUSIONS: Compared to a traditional 10-minute bout of cycle ergometry (NPL), individuals who cycled in the LPL condition chose to exercise at a higher intensity despite greater PI. Those who cycled in the HPL condition did not change their exercise intensity, but did report higher PI, possibly, because of the greater mental effort/energy requirement.

Acute and Chronic Exercise Effects on Human Memory: What We Know and Where to Go from Here.

Although the acquisition, storage, and retrieval of memories was once thought to happen within a single memory system with multiple processes operating on it, it is now believed that memory is comprised of both distinct and interacting brain systems [...].

A Qualitative Analysis of Concussion-Reporting Behavior in Collegiate Student-Athletes With a History of Sport-Related Concussion.

CONTEXT: Many survey-based methods have been used to explore concussion-reporting behavior. However, because the decision to report or conceal a concussion is likely multifactorial, this may narrow the findings, as the surveys were largely designed by the researchers. OBJECTIVE: To explore student-athletes' perspectives regarding factors that may influence the reporting of sport-related concussion. DESIGN: Qualitative study. SETTING: National Collegiate Athletic Association Division I athletics. PATIENTS OR OTHER PARTICIPANTS: We conducted 17 semistructured interviews with student-athletes who had sustained 1 or more concussions while attending a large university (men = 4, women = 13, age = 20.9 ± 1.3 years). DATA COLLECTION AND ANALYSIS: After data saturation and member checks, a 5-cycle analytic process was completed: topical review, literature review, data collection and summarizing using a codebook developed by a 3-person research team, linking of findings to current research, and final interpretations. RESULTS: We discovered 3 themes. Participants discussed concussion perceptions by describing their understanding of a concussion, their own injury experiences, and their perceptions of symptom severity and duration. Regarding reporting behavior, participants described an order of individuals with whom they would speak, symptoms present in order to report (eg, feeling different from normal), immediate reactions, and influential factors for mitigating short- and long-term consequences. Lastly, participants discussed the value of support systems, such as how coaches can both positively and negatively influence reporting and athletic trainer involvement. CONCLUSIONS: Participants often drew from their own concussion experiences in naming common concussion signs and symptoms. Additionally, they indicated that both short- and long-term health consequences influenced and deterred their seeking care and that their support systems, including coaches and athletic trainers, played a role in their concussion experience. Research is needed to determine if using student-athletes' own words to describe a concussion and incorporating student-athletes' support systems, especially coaches and athletic trainers, is effective in increasing concussion reporting.

Using the health belief model to predict concussion-reporting intentions and behaviour.

PURPOSE: To determine whether Health Belief Model (HBM) factors predict concussion-reporting intentions and behaviour. Methods: Participants completed a cross-sectional survey to measure the HBM constructs of concussion knowledge, perceived susceptibility, perceived severity, perceived benefits, perceived barriers, and cues to action. We also asked participants to indicate their concussion-reporting intentions and behaviourfor symptom and concussion reporting. Four separate multivariable regressions were conducted to predict concussion-reporting intentions and behaviour based on HBM constructs. Results: Cues to action (ß = 0.25, p= .016) predicted symptom reporting intentions (F7,318 = 4.44, p< .001, R2 = 0.089), while perceived benefits (ß = 0.12, p= .018), perceived barriers (ß = -0.11, p= .034) and cues to action (ß = 0.29, p< .001) predicted concussion-reporting intentions (F7,318 = 11.34, p < .001, R2 = 0.200). The HBM did not predict symptom or concussion-reporting behavior (symptom: Χ2 = 5.51, p= .138, Nagelkerke R2 = 0.096; concussion: Χ2 = 5.20, p= .157, Nagelkerke R2 = 0.159). Conclusions: Strategies to reduce perceived barriers and increase benefits of reporting concussion symptoms may improve reporting intentions. This may include cues to action in sharing a positive view toward long-term health and dispelling that reporting a concussion would let down teammates. .

Active Learning Norwegian Preschool(er)s (ACTNOW) - Design of a Cluster Randomized Controlled Trial of Staff Professional Development to Promote Physical Activity, Motor Skills, and Cognition in Preschoolers.

INTRODUCTION: There is a dearth of high-quality evidence on effective, sustainable, and scalable interventions to increase physical activity (PA) and concomitant outcomes in preschoolers. Specifically, there is a need to better understand how the preschool context can be used to increase various types of physically active play to promote holistic child development. The implementation of such interventions requires highly competent preschool staffs, however, the competence in promoting PA is often low. The main aim of the ACTNOW study is therefore to investigate the effects of professional development for preschool staffs on child PA and developmental outcomes. METHODS: The study will be conducted in Norway 2019-2022 and is designed as a two-arm (intervention, control) cluster randomized controlled trial (RCT) with 7- and 18-months follow-ups. We aim to recruit 60 preschools and 1,200 3- to 5-years-old children to provide sufficient power to detect effect sizes (ESs) between 0.20 and 0.30. The intervention is nested within two levels: the preschool and the child. Central to the ACTNOW intervention are opportunities for children to engage in a variety of "enriched," meaningful, and enjoyable physically active play that supports the development of the whole child. To this end, the main intervention is a 7-month professional development/education module for preschool staff, aimed to provide them with the necessary capacity to deliver four core PA components to the children (moderate-to-vigorous PA, motor-challenging PA, cognitively engaging play, and physically active learning). We will include a range of child-level outcomes, including PA, physical fitness, adiposity, motor skills, socioemotional health, self-regulation, executive function, and learning. At the preschool level, we will describe implementation and adaptation processes using quantitative and qualitative data. DISCUSSION: Professional development of staff and a whole-child approach that integrates PA with cognitively engaging play and learning activities in the preschool setting may provide a feasible vehicle to enhance both physical and cognitive development in young children. ACTNOW is designed to test this hypothesis to provide a sustainable way to build human capital and provide an early solution to lifelong public health and developmental challenges. CLINICAL TRIAL REGISTRATION: www.ClinicalTrials.gov identifier NCT04048967.

Cognitive-Motor Dual Task Interference Effects on Declarative Memory: A Theory-Based Review.

Bouts of exercise performed either prior to or immediately following study periods enhance encoding and learning. Empirical evidence supporting the benefits of interventions that simultaneously pair physical activity with material to be learned is not conclusive, however. A narrative, theory-based review of dual-task experiments evaluated studies in terms of arousal theories, attention theories, cognitive-energetic theories, and entrainment theories. The pattern of the results of these studies suggests that cognitive-motor interference can either impair or enhance memory of semantic information and the manner in which physical activity impacts working memory within executive processing appears to explain disparate outcomes. The integration and timing of physical movements in concert with the type of information to be encoded and remembered appears to be a critical requirement for learning. These observations have implications for the role of physical activity in education, rehabilitation, and gerontological settings.

Exercise, sports, and performance arts benefit cognition via a common process.

Exercise training is widely promoted as a method to enhance both physical health and cognitive function. Although routine exercise engenders physiological adaptations to the body and brain, its effects on mental processing are uncertain. Our review of the experimental evidence reveals that acknowledging the role of skill acquisition may help clarify the exercise-cognition relation. Instructional methods that optimize physical and mental challenge provide the conditions necessary to produce long-term changes in the way individuals process information, make decisions, select movements, and experience the consequences of actions. Main conclusions drawn by intersecting theory-based research on the linkages between chronic exercise and cognitive function and research on the associations of both sport and performance arts with cognitive function are as follows: (1) Exercise may be but one of many types of movement activities that can benefit cognition; (2) the process of skill acquisition provides a parsimonious explanation for outcomes across exercise, sport, and performing art studies; (3) the allocation of mental resources required during skill acquisition, independently from or interactively with the level of physical energy expenditure, is essential for reaping the largest cognitive benefits; and (4) cognitive benefits obtained via skill-acquisition interventions are enduring. This review also highlights issues that call for future research to provide convergent evidence for the relation between skill training and cognition; the inclusion of outcome measures other than executive functions; and a naturalistic translational approach to complement controlled experiments in chronic exercise and cognition and skill learning research. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

Effects of physical activity interventions on cognitive and academic performance in children and adolescents: a novel combination of a systematic review and recommendations from an expert panel.

OBJECTIVE: To summarise the current evidence on the effects of physical activity (PA) interventions on cognitive and academic performance in children, and formulate research priorities and recommendations. DESIGN: Systematic review (following PRISMA guidelines) with a methodological quality assessment and an international expert panel. We based the evaluation of the consistency of the scientific evidence on the findings reported in studies rated as of high methodological quality. DATA SOURCES: PubMed, PsycINFO, Cochrane Central, Web of Science, ERIC, and SPORTDiscus. ELIGIBILITY CRITERIA FOR SELECTING STUDIES: PA-intervention studies in children with at least one cognitive or academic performance assessment. RESULTS: Eleven (19%) of 58 included intervention studies received a high-quality rating for methodological quality: four assessed effects of PA interventions on cognitive performance, six assessed effects on academic performance, and one on both. All high-quality studies contrasted the effects of additional/adapted PA activities with regular curriculum activities. For cognitive performance 10 of 21 (48%) constructs analysed showed statistically significant beneficial intervention effects of PA, while for academic performance, 15 of 25 (60%) analyses found a significant beneficial effect of PA. Across all five studies assessing PA effects on mathematics, beneficial effects were reported in six out of seven (86%) outcomes. Experts put forward 46 research questions. The most pressing research priority cluster concerned the causality of the relationship between PA and cognitive/academic performance. The remaining clusters pertained to PA characteristics, moderators and mechanisms governing the 'PA-performance' relationship and miscellaneous topics. CONCLUSION: There is currently inconclusive evidence for the beneficial effects of PA interventions on cognitive and overall academic performance in children. We conclude that there is strong evidence for beneficial effects of PA on maths performance.The expert panel confirmed that more 'high-quality' research is warranted. By prioritising the most important research questions and formulating recommendations we aim to guide researchers in generating high-quality evidence. Our recommendations focus on adequate control groups and sample size, the use of valid and reliable measurement instruments for physical activity and cognitive performance, measurement of compliance and data analysis. PROSPERO REGISTRATION NUMBER: CRD42017082505.

Effects of the Timing of Acute Exercise and Movement Complexity on Young Adults' Psychomotor Learning.

The role of acute bouts of exercise on young adults' psychomotor learning was assessed in two experiments. In Experiment 1, 10 min of exercise performed immediately following pursuit-rotor training improved retention of tracking movements, but only when measured 7 days following encoding and only under exercise conditions that required complex decisions. In Experiment 2, 10 min of exercise performed immediately prior to encoding resulted in a retention pattern similar to that seen in Experiment 1; however, performance did not differ significantly between exercise and control groups. In both experiments, retention of motor movement was greater when measured 24 hr and 7 days after training, as opposed to immediately following encoding. The mnemonic benefits of moderately vigorous complex physical activity appear to assist a motor memory trace to transform from a fragile to a more persistent state.

Systematic review of acute physically active learning and classroom movement breaks on children's physical activity, cognition, academic performance and classroom behaviour: understanding critical design features.

OBJECTIVE: To examine the impact of acute classroom movement break (CMB) and physically active learning (PAL) interventions on physical activity (PA), cognition, academic performance and classroom behaviour. DESIGN: Systematic review. DATA SOURCES: PubMed, EBSCO, Academic Search Complete, Education Resources Information Center, PsycINFO, SPORTDiscus, SCOPUS and Web of Science. ELIGIBILITY CRITERIA FOR SELECTING STUDIES: Studies investigating school-based acute bouts of CMB or PAL on (PA), cognition, academic performance and classroom behaviour. The Downs and Black checklist assessed risk of bias. RESULTS: Ten PAL and eight CMB studies were identified from 2929 potentially relevant articles. Risk of bias scores ranged from 33% to 64.3%. Variation in study designs drove specific, but differing, outcomes. Three studies assessed PA using objective measures. Interventions replaced sedentary time with either light PA or moderate-to-vigorous PA dependent on design characteristics (mode, duration and intensity). Only one study factored individual PA outcomes into analyses. Classroom behaviour improved after longer moderate-to-vigorous (>10 min), or shorter more intense (5 min), CMB/PAL bouts (9 out of 11 interventions). There was no support for enhanced cognition or academic performance due to limited repeated studies. CONCLUSION: Low-to-medium quality designs predominate in investigations of the acute impacts of CMB and PAL on PA, cognition, academic performance and classroom behaviour. Variable quality in experimental designs, outcome measures and intervention characteristics impact outcomes making conclusions problematic. CMB and PAL increased PA and enhanced time on task. To improve confidence in study outcomes, future investigations should combine examples of good practice observed in current studies. PROSPERO REGISTRATION NUMBER: CRD42017070981.

Exercise and Cognition-2016.

Physical activity is purported to promote children's brain health and enhance mental development (1). Three studies were selected for review because of their focus on issues that challenge translational research applications in exercise pediatric science. While some disagreement exists concerning the definition of translational research, most suggest that translational interventions focus on the uptake, implementation, and sustainability of research findings within standard care (2). Translational researchers typically highlight differences that exist between efficacy experiments, which provide evidence that a specific intervention works, and effectiveness experiments, which show that the intervention will reap benefits under real-world conditions. Results obtained from laboratory-based efficacy studies that have examined the relation between exercise and cognition led researchers (3,4) and policy makers to consider the importance of physical activity in school settings. Large-scale studies that assess the impact of various types of school based physical activity intervention on children's cognitive and academic performance have begun. The initial results have been uneven and suggestive of a lack of benefit for children in authentic school settings. Before drawing such conclusions, however, it will be important for researchers and practitioners to recognize the methodological and measurement issues that challenge attempts to employ laboratory methodologies to academic settings.

Effects of Isometric Hand-Grip Muscle Contraction on Young Adults' Free Recall and Recognition Memory.

PURPOSE: The purpose of this study was to determine if physical arousal produced by isometric hand-dynamometer contraction performed during word-list learning affects young adults' free recall or recognition memory. METHOD: Twenty-four young adults (12 female; Mage = 22 years) were presented with 4 20-item word lists. Moderate arousal was induced in 12 adults by an initial 30-s maximal hand-dynamometer squeeze with force productions of 50% maximum; low arousal was induced in 12 adults by an initial 1-s maximal dynamometer squeeze with force production of 10% maximum during learning. Memory performances following dual-task conditions experienced during the encoding, consolidation, and recall phases of learning were compared to a single-task control condition during which words were learned in the absence of isometric exercise. RESULTS: Planned contrasts revealed that arousal coinciding with word encoding led to significantly poorer immediate recall, F(1, 23) = 10.13, p < .05, [Formula: see text] = .31, delayed free recall, F(1, 23) = 15.81, p < .05, [Formula: see text] = .41, and recognition memory, F(1, 23) = 6.07, p < .05, [Formula: see text] = .21, compared with when there was no arousal. Neither arousal condition facilitated participants' memory performance. CONCLUSION: The reduction in long-term memory performance specific to the encoding phase of learning is explained in terms of the dual-task attentional demands placed on participants.

Driving after Concussion: Is It Safe To Drive after Symptoms Resolve?

Post-concussion impairments may result in unsafe driving performance, but little research is available to guide consensus on when concussed individuals should return to driving. The purpose of this study was to compare driving performance between individuals with and without a concussion and to explore relationships between neuropsychological and driving performance. Fourteen participants with concussion (age 20.2 ± 0.9 years old) and 14 non-concussed age- and driving experience-matched controls (age 20.4 ± 1.1 years old) completed a graded symptom checklist, a brief neuropsychological exam, and a 20.5 km driving simulation task. Participants with a concussion completed driving simulation within 48 h of becoming asymptomatic (15.9 ± 9.0 days post-concussion). One-way analyses of variance were used to compare total number of crashes, tickets, and lane excursions, as well as standard deviation of lateral position (SDLP) and standard deviation of speed. Pearson's correlations were conducted to explore the relationship between the neuropsychological and driving performance separately by group (α = 0.05). Participants with a concussion committed more frequent lane excursions (concussed 10.9 ± 4.5; controls 7.4 ± 2.4; p = 0.017) and exhibited greater SDLP, compared with controls, during the first curve (concussed 45.7 ± 21.3 cm, controls 27.4 ± 6.1 cm; p = 0.030) and final curve (concussed 39.6 ± 24.4 cm; controls 33.5 ± 21.3 cm; p = 0.036). Poorer performance on symbol digit modalities (r = -0.54), Rey Osterrieth Complex Figure (r = -0.53), verbal memory (r = -0.77), and motor speed (r = -0.54) were correlated with more frequent lane excursions in the concussed group, but not in the control group. Despite being asymptomatic, concussed participants exhibited poorer vehicle control, especially when navigating curves. Driving impairments may persist beyond when individuals with a concussion have returned to driving. Our study provides preliminary guidance regarding which neuropsychological functions may best indicate driving impairment following concussion.