A person-centred investigation of the associations between actual and perceived physical fitness among youth with intellectual disabilities.

The main objective of this person-centred study was to identify profiles of actual and perceived physical fitness among a sample of youth with intellectual disabilities (ID). Participants were 377 youth (60.4% boys) with mild (49.6%) to moderate (50.4%) ID recruited in Australia and Canada. Latent profile analyses revealed five profiles: (1) Underestimation of Average Physical Fitness (5.5% of the sample); (2) Moderate Overestimation of Low Physical Fitness (17.7%), (3) Moderate Underestimation of Average Physical Fitness (31.3%); (4) High Overestimation of Average Physical Fitness (28.3%); and (5) Moderate Underestimation of High Physical Fitness with an Accurate Estimation of Average Flexibility (17.2%). Profiles 1, 2, and 3 relatives to Profiles 4 and 5 included younger participants, more participants with moderate levels of ID, and participants with a higher body mass index. Additionally, profiles 1 and 3 also included a higher proportion of youth pursuing externally-driven motives and less frequently involved in sports outside of the school. In sum, our findings showed that the tendency of youth with ID to rely on upward or downward-lateral social comparisons may have resulted in a depreciation or overestimation of their low levels of physical fitness.

Achievement Goals as Mediators of the Links Between Self-Esteem and Depressive Symptoms From Mid-Adolescence to Early Adulthood.

Numerous studies have sought to determine whether low self-esteem acts as a risk factor for depressive symptoms (i.e., a vulnerability model) or whether depressive symptoms lead to a decrease in self-esteem (i.e., a scar model). Although both models have received some support, very little research has: (a) addressed this question across critical life transitions likely to modify this pattern of associations, such as the transition to adulthood; (b) sought to identify the psychological mechanisms (i.e., mediators) underpinning these associations. The present study was designed to address these two limitations, focusing on the directionality of the associations between depressive symptoms and self-esteem from mid-adolescence to early adulthood while considering the role of motivational factors, namely mastery (intrinsic/extrinsic) and performance (approach/avoidance) goals as conceptualized in achievement goal theory. A sample of 707 Finnish adolescents aged 15-16 (52.1% boys) was surveyed six times up to the age of 25. Results from a cross-lagged panel model (CLPM) revealed that depressed individuals were more likely to have low self-esteem, although self-esteem protected against depressive symptoms between ages 16-17 to 20-21. Moreover, while self-esteem promoted mastery-extrinsic goals which in turn reinforced self-esteem, depressive symptoms promoted performance-avoidance goals which led to more depressive symptoms and lower self-esteem. Overall, these findings highlight (1) the long-lasting negative consequences of depressive symptoms on self-esteem and (2) the crucial role played by academic motivation in explaining the development of depressive symptoms and self-esteem over time. In turn, these results help refine the vulnerability and scar models, and suggest that motivational factors should be considered in prevention and intervention efforts among young populations.

A Multilevel Person-Centered Perspective on the Role of Job Demands and Resources for Employees' Job Engagement and Burnout Profiles.

The present study examined the configurations, or profiles, taken by distinct global and specific facets of job engagement and burnout (by relying on a bifactor operationalization of these constructs) among a nationally representative sample of Canadian Defence employees (n = 13,088; nested within 65 work units). The present study also adopted a multilevel perspective to investigate the role of job demands (work overload and role ambiguity), as well as individual (psychological empowerment), workgroup (interpersonal justice), supervisor (transformational leadership), and organizational (organizational support) resources in the prediction of profile membership. Latent profile analyses revealed five profiles of employees: Burned-Out/Disengaged (7.13%), Burned-Out/Involved (12.13%), Engaged (18.14%), Engaged/Exhausted (15.50%), and Normative (47.10%). The highest turnover intentions were observed in the Burned-Out/Disengaged profile, and the lowest in the Engaged profile. Employees' perceptions of job demands and resources were also associated with profile membership across both levels, although the effects of psychological empowerment were more pronounced than the effects of job demands and resources related to the workgroup, supervisor, and organization. Individual-level effects were also more pronounced than effects occurring at the work unit level, where shared perceptions of work overload and organizational support proved to be the key shared drivers of profile membership.

Spontaneous Demixing of Binary Colloidal Flocks.

Population heterogeneity is ubiquitous among active living systems, but little is known about its role in determining their spatial organization and large-scale dynamics. Combining evidence from synthetic active fluids assembled from self-propelled colloidal particles along with theoretical predictions at the continuum scale, we demonstrate the spontaneous demixing of binary polar liquids within circular confinement. Our analysis reveals how both active speed heterogeneity and nonreciprocal repulsive interactions lead to self-sorting behavior. By establishing general principles for the self-organization of binary polar liquids, our findings highlight the specificity of multicomponent active systems.

Profiles of body image concerns and their associations with disordered eating behaviors.

Although body image concerns (BIC) are recognized as a core driver in the development of disordered eating behaviors, the combined role of various types of BIC remains underexamined. This study relied on latent profile analysis to identify the main configurations of self-reported BIC (i.e., body checking and avoidance, perceived physical appearance, and fear of negative appearance evaluation) observed in a sample of 419 French-Canadian individuals (Mage = 26.59, SDage = 9.23). The role of body mass index, sex, and age on profile membership was also examined, as well as the relation between profile membership and disordered eating behaviors (i.e., dieting, bulimia and food preoccupation, and oral control). Six distinct BIC profiles differing in terms of shape and level were identified, with women being more likely to display a profile characterized by higher levels of BIC. In turn, profiles characterized by higher levels of BIC were associated with more disordered eating behaviors. The present study can broaden our understanding of the onset and maintenance of disordered eating behaviors and inspire the development of more tailored body-image interventions.

A longitudinal investigation of structural empowerment profiles among healthcare employees.

PURPOSE: Research on structural empowerment has typically adopted a variable-centered perspective, which is not ideal to study the combined effects of structural empowerment components. This person-centered investigation aims to enhance our knowledge about the configurations, or profiles, of healthcare employees' perceptions of the structural empowerment dimensions present in their workplace (opportunity, information, support, and resources). Furthermore, this study considers the replicability and stability of these profiles over a period of 2 years, and their outcomes (perceived quality of care, and positive and negative affect). DESIGN: Participants completed the same self-reported questionnaires twice, 2 years apart. METHODS: A sample of 633 healthcare employees (including a majority of nurses and nursing assistants) participated. Latent transition analyses were performed. RESULTS: Five profiles were identified: Low Empowerment, High Information, Normative, Moderately High Empowerment, and High Empowerment. Membership into the Normative and Moderately High Empowerment profiles demonstrated a high level of stability over time (79.1% to 83.2%). Membership in the other profiles was either moderately stable (43.5% for the High Empowerment profile) or relatively unstable (19.7% to 20.4% for the Low Empowerment and High Information profiles) over time. More desirable outcomes (i.e., higher positive affect and quality of care, and lower negative affect) were observed in the High Empowerment profile. CONCLUSIONS: These results highlight the benefits of high structural empowerment, in line with prior studies suggesting that structural empowerment can act as a strong organizational resource capable of enhancing the functioning of healthcare professionals. These findings additionally demonstrate that profiles characterized by the highest or lowest levels of structural empowerment were less stable over time than those characterized by more moderate levels. CLINICAL RELEVANCE: From an intervention perspective, organizations and managers should pay special attention to employees perceiving low levels of structural empowerment, as they experience the worst outcomes. In addition, they should try to maintain high levels of structural empowerment within the High Empowerment profile, as this profile is associated with the most desirable consequences. Such attention should be fruitful, considering the instability of the High Empowerment and Low Empowerment profiles over time. REGISTRATION: NCT04010773 on ClinicalTrials.gov (4 July, 2019).

Respiratory sinus arrhythmia moderates the interpersonal consequences of brooding rumination.

Brooding rumination is an intrapersonal emotion regulation strategy associated with negative interpersonal consequences. Resting respiratory sinus arrhythmia (RSA), a psychophysiological marker of self-regulatory capacity, may buffer the association between maladaptive emotion regulation and negative interpersonal behaviors. The current work examines the moderating effect of RSA on the association between brooding rumination and different negative interpersonal consequences. Across three convenience samples, individuals with lower RSA showed a stronger association between brooding rumination and more negative interpersonal behaviors as well as less perception of received instrumental social support (Study 1; n = 154), higher levels of interviewer-rated interpersonal stress (Study 2; n = 42) and a stronger indirect association between brooding rumination and depressive symptoms via daily interpersonal stress (Study 3; n = 222). These findings highlight the negative interpersonal consequences of brooding rumination, particularly among individuals with lower RSA.

Nature, implications and determinants of academic motivation profiles among upper elementary and secondary students.

The present study sought to contribute to self-determination theory by examining the nature of adolescents' academic motivation profiles defined while considering its global and specific nature. The construct validity of these profiles was examined by considering their replicability across samples of upper elementary (n = 781) and secondary (n = 467) school students, as well as their associations with predictors (perceived parental need nurturing behaviors) and outcomes (academic achievement and expectations of success). Latent profile analyses revealed four profiles (Non-Motivated, Identified, Amotivated, and Strongly Motivated) characterized by differing levels of global and specific levels of academic motivation. These profiles were fully replicated across educational levels. Most profiles differed from one another in terms of outcomes, although differences in terms of outcomes associations were observed across educational levels. Finally, profile membership was predicted by global levels of need nurturing and by some of the specific need nurturing behaviors in a way that replicated across educational levels. Our results suggest that the specific qualities of academic motivation and the global levels of self-determination are equally important in the identification of academic motivation profiles. Supplementary Information: The online version contains supplementary material available at 10.1007/s12144-023-04687-x.

Repulsive torques alone trigger crystallization of constant speed active particles.

We investigate the possibility for self-propelled particles to crystallize without reducing their intrinsic speed. We illuminate how, in the absence of any force, the competition between self-propulsion and repulsive torques determines the macroscopic phases of constant-speed active particles. This minimal model expands upon existing approaches for an improved understanding of crystallization of active matter.

Delivery method matters: omega-3 supplementation by restricted feeding period and oral gavage has a distinct impact on corticosterone secretion and anxious behavior in adolescent rats.

Objectives: Oral gavage and time-restricted feeding are common delivery methods for dietary supplementation to rodents. However, the stress associated with selected feeding regimens could represent a confounding variable. In rodents, the adolescence period is particularly vulnerable to stressful events, in part related to ongoing maturation of the brain. In this context, omega-3 dietary supplementation has shown beneficial effects on neuronal growth, cognitive performance and stress regulation, while high-fat diet (HVF) has been associated with enhanced stress and anxiety. Therefore, this study has two aims: (1) evaluate the influence of 21-day supplementation with soybean oil (control group; CSO), fish oil (FO) or hydrogenated vegetable fat (HVF) fatty acids (FA) during the adolescence period on corticosterone secretion and anxiety-like behavior and, (2) compare the impact of dietary supplementation using oral gavage or time-limited feeding on these measures.Methods: Oral gavage or restricted feeding were used to daily feed adolescent rats (PND28-47; n = 49). On supplementation days 1, 7, 14 and 21, droplets of blood were collected for corticosterone (CORT) assessments. The Open Field (OFT) and the Elevated-Plus Maze (EPM) tests served to assess anxiety-like behavior on PND50.Results: Our findings indicate increased CORT secretion in restricted-(R) compared to gavage-fed animals on DAY7 and DAY14, suggesting heightened HPA-axis reactivity. Notably, CORT secretion diminished in FO-R-rats (DAY21), suggesting improved coping/adjustment. Consistent with CORT assessments, findings in the OFT and EPM supported attenuated anxiety in gavage versus restricted groups. FO and CSO supplementation reduced anxiety compared to HVF intake.Conclusions: Our findings uncover a significant impact of feeding methods on anxiety-like behavior and physiological stress response in rodents, supporting oral gavage as a less stressful option during the adolescent developmental stage. Supplement-specific effects on CORT secretion further indicated an influence of fish oil in regulating the stress response.

Relationship Between Actual and Perceived Locomotor and Ball Skills Competence Among Children: A Person-Centered Approach.

This study examined whether profiles varying in actual and perceived locomotor and ball skill competencies would be identified and whether these profiles would differ in relation to children's characteristics. Participants were 127 (70 boys; 57 girls) French-speaking Canadian children (5-11 years). Actual and perceived motor competencies were, respectively, measured using the Test of Gross Motor Development - Third version and the pictorial scale of Perceived Movement Skill Competence. Latent profile analyses revealed four profiles: (1) Non-Alignment: Devaluation (children underestimated their slightly below average competencies; 17.9%); (2) Non-Alignment: Overestimation (children overestimated their slightly below average competencies; 24.7%); (3) Non-Alignment: Underestimation (children slightly underestimated their above average competencies; 24.9%); (4) Alignment: Low Competence (children displayed accurate but slightly below average competencies; 32.5%). Girls were more likely to correspond to profiles 1 and 4, older children and children more frequently involved in physical activity/sport practice were more likely to correspond to profile 3, and younger children were more likely to correspond to profile 2. These results emphasise the importance of considering the alignment between perceived and actual motor competencies. They also indicate that age and physical activity/sport practice were associated with higher competencies, whereas girls and younger children were associated with lower competencies.

Profiles of Anxious and Depressive Symptoms Among Adolescent Boys and Girls: Associations with Coping Strategies.

Most existing studies investigating profiles of anxious and depressive symptoms in adolescent boys and girls do not consider the high cooccurrence between them, which prevents from identifying how heterogeneous groups might distinctly use coping strategies. To address this gap, the current study relies on a sample of 976 adolescents (56.0% girls (n = 547), aged 12-15 y.o., M = 12.92, SD = 0.75) to identify profiles of self-reported internalizing symptoms while properly disaggregating youth's global levels of internalizing symptoms from their specific levels of anxious and depressive symptoms. The study also assesses whether similar profiles will be identified with the same frequency among boys and girls, as well as the associations between profile membership and coping strategies (problem-solving, social support, cognitive restructuring, cognitive avoidance, and behavioral avoidance) and whether these associations vary between sexes. Bifactor-confirmatory factor analyses confirmed the presence of a global internalizing factor and six specific factors reflecting anxious and depressive symptoms. Latent profile analyses identified three similar profiles among boys and girls but with different prevalence: Low internalizing symptoms (29.97% (n = 164) girls; 70.77% (n = 304) boys), Internalizing and specific anxious symptoms (40.15% (n = 220) girls, 14.75% (n = 63) boys), and Internalizing and specific depressive symptoms (29.86% (n = 163) girls, 14.48% (n = 62) boys). Girls in the Internalizing and specific anxious profile reported more frequent use of four coping strategies compared to boys (problem-solving, social support, cognitive restructuring, and cognitive avoidance). Among boys and girls, the Internalizing and specific depressive profile was associated with the least strategic use of coping strategies (low problem-solving, social support, and cognitive restructuring, and high cognitive and behavioral avoidance). The Internalizing and specific anxious profile was associated with high levels of all coping strategies (except behavioral avoidance). Overall, the study demonstrates that disaggregating global and specific internalizing symptoms allow identifying qualitatively distinct profiles, which then raised questions on the efficacy of the coping strategies used by youth with an Internalizing and specific anxious profile. These results support the adoption of a transdiagnostic approach of treatment based on a holistic representation of all aspects of adolescent boys' and girls' internalizing symptoms to better accompany them in the selection of their coping strategies.

Longitudinal Trajectories, Social and Individual Antecedents, and Outcomes of Problematic Internet Use Among Late Adolescents.

Given the detrimental effects associated with problematic internet use (PIU) and the need to better understand its nature and evolution, the present study examined the development of PIU in a sample of 1,750 adolescents (aged 16-19) from Finland over a 3-year period. We documented the social (loneliness, perceived maternal and paternal behaviors) and individual (sex) antecedents, as well as the outcome implications (depressive symptoms, substance use, academic achievement) of PIU trajectories. Outcomes also predicted PIU trajectories. Latent curve modeling revealed an initially moderate, and subsequently decreasing trajectory of PIU. PIU was predicted by loneliness, paternal neglect, maternal care, depressive symptoms, and being male. In turn, PIU trajectories predicted increases in depressive symptoms and substance use, but decreases in academic achievement.

Radiological classification of dementia from anatomical MRI assisted by machine learning-derived maps.

BACKGROUND AND PURPOSE: Many artificial intelligence tools are currently being developed to assist diagnosis of dementia from magnetic resonance imaging (MRI). However, these tools have so far been difficult to integrate in the clinical routine workflow. In this work, we propose a new simple way to use them and assess their utility for improving diagnostic accuracy. MATERIALS AND METHODS: We studied 34 patients with early-onset Alzheimer's disease (EOAD), 49 with late-onset AD (LOAD), 39 with frontotemporal dementia (FTD) and 24 with depression from the pre-existing cohort CLIN-AD. Support vector machine (SVM) automatic classifiers using 3D T1 MRI were trained to distinguish: LOAD vs. Depression, FTD vs. LOAD, EOAD vs. Depression, EOAD vs. FTD. We extracted SVM weight maps, which are tridimensional representations of discriminant atrophy patterns used by the classifier to take its decisions and we printed posters of these maps. Four radiologists (2 senior neuroradiologists and 2 unspecialized junior radiologists) performed a visual classification of the 4 diagnostic pairs using 3D T1 MRI. Classifications were performed twice: first with standard radiological reading and then using SVM weight maps as a guide. RESULTS: Diagnostic performance was significantly improved by the use of the weight maps for the two junior radiologists in the case of FTD vs. EOAD. Improvement was over 10 points of diagnostic accuracy. CONCLUSION: This tool can improve the diagnostic accuracy of junior radiologists and could be integrated in the clinical routine workflow.

Rapid characterization of neutral polymer brush with a conventional zetameter and a variable pinch of salt.

The fundamental and practical importance of particle stabilization has motivated various characterization methods for studying polymer brushes on particle surfaces. In this work, we show how one can perform sensitive measurements of neutral polymer coating on colloidal particles using a commercial zetameter and salt solutions. By systematically varying the Debye length, we study the mobility of the polymer-coated particles in an applied electric field and show that the electrophoretic mobility of polymer-coated particles normalized by the mobility of non-coated particles is entirely controlled by the polymer brush and independent of the native surface charge, here controlled with pH, or the surface-ion interaction. Our result is rationalized with a simple hydrodynamic model, allowing for the estimation of characteristics of the polymer coating: the brush length L, and the Brinkman length ξ, determined by its resistance to flows. We demonstrate that the Debye layer provides a convenient and faithful probe to the characterization of polymer coatings on particles. Because the method simply relies on a conventional zetameter, it is widely accessible and offers a practical tool to rapidly probe neutral polymer brushes, an asset in the development and utilization of polymer-coated colloidal particles.

Monitoring the evolution of individuals' flood-related adaptive behaviors over time: two cross-sectional surveys conducted in the Province of Quebec, Canada.

Climate change is predicted to increase the frequency and intensity of floods in the province of Quebec, Canada. Therefore, in 2015, to better monitor the level of adaptation to flooding of Quebec residents living in or near a flood-prone area, the Quebec Observatory of Adaptation to Climate Change developed five indices of adaptation to flooding, according to the chronology of events. The present study was conducted 4 years later and is a follow-up to the 2015 one. Two independent samples of 1951 (2015) and 974 (2019) individuals completed a questionnaire on their adoption (or non-adoption) of flood adaptation behaviors, their perception of the mental and physical impacts of flooding, and their knowledge of the fact that they lived in a flood-prone area.The results of the study demonstrated the measurement invariance of the five indices across two different samples of people over time, ensuring that the differences (or absence of differences) observed in flood-related adaptive behaviors between 2015 and 2019 were real and not due to measurement errors. They also showed that, overall, Quebeckers' flood-related adaptive behaviors have not changed considerably since 2015, with adaptation scores being similar in 2019 for four of the five flood indices. Moreover, the results indicated an increase in self-reported physical and mental health issues related to past flooding events, as well as a larger proportion of people having consulted a health professional because of these problems. Thus, this study provides a better understanding of flood adaptation in Quebec over the past 4 years and confirms that the five adaptive behavior indices developed in 2015 are appropriate tools for monitoring changes in flood adaptation in the province. Finally, our results showed that little has changed in Quebeckers' adoption of adaptive behaviors, highlighting the need for awareness raising in order to limit the impacts that climate change will have on the population.

The Forest and the Trees: Investigating the Globality and Specificity of Employees' Basic Need Satisfaction at Work.

This research assessed the underlying psychometric multidimensionality and nomological validity of 523 employees' responses to the Work-related Basic Need Satisfaction (W-BNS) scale using bifactor-exploratory structural equation modeling (bifactor-ESEM). Our results first showed the superiority of a bifactor-ESEM representation when compared to alternative representations of the data. Thus, employees' ratings of psychological need satisfaction simultaneously reflected a global need satisfaction construct, which coexisted with specific autonomy, competence, and relatedness needs satisfaction. Importantly, our findings also supported the nomological validity of employees' ratings of psychological need satisfaction in relation to measures of positive affect, negative affect, job satisfaction, perceived organizational support, organizational citizenship behaviors, work engagement, and burnout. In addition, our results also supported the presence of indirect (mediated) effects between perceived organizational support and some of the outcome variables as mediated by employees' levels of need satisfaction.

Internalizing and Externalizing Behavior Problems and Student Engagement in Elementary and Secondary School Students.

Students with externalizing or internalizing behavior problems are at increased risk of underachievement and school non-completion, often due to their lower school engagement. Two studies were undertaken to assess the unique and joint (i.e., interactive) associations between behavior problems and engagement during two developmental periods; childhood and adolescence. These studies also aim to disentangle the contribution of global (externalizing and internalizing) and specific (hyperactivity/inattention, opposition/defiance, anxiety, depression) behavior problems on the global and specific aspects of student behavioral, emotional, and cognitive engagement. Study 1 was conducted among a sample of elementary school students (n = 1036; 3rd to 6th grade; mean age = 9.94 y.o.; 47.30% female; majority native Canadians) and Study 2 was conducted in secondary school (n = 1011; 7th and 8th grade; mean age = 12.93 y.o.; 55.77% female; 60.64% from immigrant background). Results of the bifactor-CFA and path analyses from both studies indicate that global externalizing behaviors were associated with lower global and specific behavioral engagement. In Study 1, global internalizing behaviors were also associated with lower global and specific cognitive engagement, whereas specific anxiety was associated with lower global and specific emotional engagement. In Study 2, specific depressive symptoms were associated with lower global and specific emotional engagement. Together, these two studies suggest that externalizing behaviors remain risk factors for student disengagement during childhood and adolescence, but that the risk posed by internalizing behaviors increases in importance for older students.

Sounds and hydrodynamics of polar active fluids.

Spontaneously flowing liquids have been successfully engineered from a variety of biological and synthetic self-propelled units1-11. Together with their orientational order, wave propagation in such active fluids has remained a subject of intense theoretical studies12-17. However, the experimental observation of this phenomenon has remained elusive. Here, we establish and exploit the propagation of sound waves in colloidal active materials with broken rotational symmetry. We demonstrate that two mixed modes, coupling density and velocity fluctuations, propagate along all directions in colloidal-roller fluids. We then show how the six material constants defining the linear hydrodynamics of these active liquids can be measured from their spontaneous fluctuation spectrum, while being out of reach of conventional rheological methods. This active-sound spectroscopy is not specific to synthetic active materials and could provide a quantitative hydrodynamic description of herds, flocks and swarms from inspection of their large-scale fluctuations18-21.

Exercise interventions to improve balance for young people with intellectual disabilities: a systematic review and meta-analysis.

AIM: To conduct a systematic review and meta-analysis of the effects of exercise interventions designed to improve balance in young people with intellectual disabilities. METHOD: A systematic literature search was performed on 10 databases. Studies in press or published in English in a peer-reviewed journal were included if: (1) participants were young people with intellectual disabilities; (2) exercise interventions were designed to improve balance; and (3) they used quasi-experimental or experimental designs. Studies focusing only on a specific subpopulation of young people with intellectual disabilities or having a specific physical characteristic were excluded. Risk of bias was assessed for randomization, allocation sequence concealment, blinding, incomplete outcome data, selective outcome reporting, and other biases. RESULTS: The search strategy identified 937 articles and 15 studies, published between 1991 and 2017, that met the inclusion criteria. Exercise intervention groups showed a significant and larger improvement in static (pooled effect size, Hedges' g=0.98) and dynamic (g=1.34) balance compared with the control groups. However, although the pooled improvement of static-dynamic balance was large (g=2.80), the result was non-significant. None of the subgroup analyses were significant, except for the improvement in: (1) static balance (higher in quasi-experimental than in experimental studies); and (2) dynamic balance (higher in young people with a mild vs a mild-moderate intellectual disability). INTERPRETATION: The reviewed exercise interventions seem to represent an effective means for improving the static and dynamic balance of young people with intellectual disabilities. However, the present findings should be considered as preliminary given the small number of studies and their limitations. WHAT THIS PAPER ADDS: Exercise intervention results in large and significant improvements in static and dynamic balance in young people with intellectual disabilities. Exercise intervention results in a large but non-significant improvement in static-dynamic balance. Static balance improvement was significantly higher in quasi-experimental versus experimental studies. Dynamic balance improvement was significantly higher in young people with mild versus mild-moderate intellectual disability. No significant differences related to age group, balance measures, and components of exercise intervention were found.

EJERCICIOS PARA MEJORAR EL EQUILIBRIO EN JÓVENES CON DISCAPACIDAD INTELECTUAL: UNA REVISIÓN SISTEMÁTICA Y UN METAANÁLISIS: OBJETIVO: Realizar una revisión sistemática y un metaanálisis sobre los efectos del ejercicio diseñado para mejorar el equilibrio en jóvenes con discapacidad intelectual. METODO: Se realizó una búsqueda sistemática en 10 bases de datos. Fueron incluidos estudios impresos o publicados en ingles en publicaciones revisadas por sus pares; que a su vez : (1) los participantes eran jóvenes con discapacidad intelectual, (2) las intervenciones a través del ejercicio fueron diseñados para mejorar el equilibrio, (3) fueron usados diseños experimentales o cuasi experimentales. Los estudios que se enfocaron únicamente a una subpoblación de jóvenes con discapacidad intelectual y los que tenían características físicas específicas fueros excluidos. El riesgo de sesgo fue evaluado para detectar randomización, ocultamiento de secuencia de alocación, estudios ciegos, datos de resultado incompletos, reporte de resultados seleccionados y otros sesgos RESULTADOS: La estrategia de búsqueda identificó 937 artículos y 15 estudios, publicados entre 1991 y 2017, que cumplieron los criterios de inclusión. El grupo con intervención de ejercicios mostró una mejora significativa en el balance estático (tamaño del efecto agrupado, g=0.98) y balance dinámico (g=1.34) comparado con el grupo control. Sin embargo, aunque la mejoría combinada del balance estático y dinámico fue grande (g=2.80), el resultado no es significativo. Ninguno de los subgrupos analizados fue significativo, excepto por la mejora en: (1) balance estático (mayor en los estudios cuasi-experimentales que en los experimentales) y (2) balance dinámico (mayor en gente joven con discapacidad intelectual leve que en gente con discapacidad intelectual leve -moderado). INTERPRETACION: La revisión de intervenciones con ejercicio parece representar un método eficaz para mejorar el equilibrio estático y dinámico en jóvenes con discapacidad intelectual. Sin embargo, los hallazgos deben ser considerados como preliminares por la pequeña cantidad de estudios y sus limitaciones.

INTERVENÇÕES COM EXERCÍCIOS PARA MELHORAR O EQUILÍBRIO PARA JOVENS COM DEFICIÊNCIA INTELECTUAL: UMA REVISÃO SISTEMÁTICA E METANÁLISE: OBJETIVO: Conduzir uma revisão sistemática e metanálise sobre os efeitos das intervenções com exercícios desenhadas para melhorar o equilíbrio em jovens com deficiência intelectual. MÉTODO Uma revisão sistemática da literature foi realizada em 10 bases de dados. Estudos in press ou publicados em inglês em revistas revisadas por pares foram incluídos se: 1) os participantes fossem jovens com deficiência intellectual; 2) intervenções com exercícios foram aplicadas visando melhorar o equilíbrio e 3) usaram desenhos experimentais ou quasi-experimentais. Estudos com enfoque em apenas uma sub-população específica de jovens com deficiência intelectual ou que tinham alguma característica física específica foram excluídos. O risco de viés foi avaliado para randomização, sequência de alocação selada, cegamento, resultados incompletes, relato seletivo de resultados, e outros vieses. RESULTADOS: A estratégia de busca identificou 937 artigos e 15 estudos, publicados entre 1991 e 2017, que atenderam aos critérios de inclusão Os grupos sob intervenção com exercícios mostraram significativa e maior melhora no equilíbrio estático (tamanho do efeito agrupado de Hedges g=0,98) and dinâmico (g=1,34) comparados com os grupos controle. Entretanto, embora a melhora agrupada no equilíbrio estático-dinâmico tenha sido grande (g=2,80), o resultado não foi significativo. Nenhuma das análises de subrupos foi significativa, exceto para a melhora em: (1) equilíbrio estático (maior nos estudos quasi-experimentais que nos experimentais) e (2) equilíbrio dinâmico (maior em jovens com deficiência intelectual leve versus leve-moderada). INTERPRETAÇÃO: As intervenções com exercícios revisadas parecem representar um meio efetivo de melhorar o equilíbrio estático e dinâmico de jovens com deficiência intelectual. No entanto, os achados presentes devem ser considerados preliminaries dado o pequeno número de estudos e suas limitações.