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1.
Diabet Med ; 40(9): e15169, 2023 09.
Artigo em Inglês | MEDLINE | ID: mdl-37381170

RESUMO

AIMS: To describe the process and outputs of a workshop convened to identify key priorities for future research in the area of diabetes and physical activity and provide recommendations to researchers and research funders on how best to address them. METHODS: A 1-day research workshop was conducted, bringing together researchers, people living with diabetes, healthcare professionals, and members of staff from Diabetes UK to identify and prioritise recommendations for future research into physical activity and diabetes. RESULTS: Workshop attendees prioritised four key themes for further research: (i) better understanding of the physiology of exercise in all groups of people: in particular, what patient metabolic characteristics influence or predict the physiological response to physical activity, and the potential role of physical activity in beta cell preservation; (ii) designing physical activity interventions for maximum impact; (iii) promoting sustained physical activity across the life course; (iv) designing physical activity studies for groups with multiple long-term conditions. CONCLUSIONS: This paper outlines recommendations to address the current gaps in knowledge related to diabetes and physical activity and calls on the research community to develop applications in these areas and funders to consider how to stimulate research in these areas.


Assuntos
Pesquisa Biomédica , Diabetes Mellitus , Humanos , Exercício Físico , Diabetes Mellitus/terapia , Pessoal de Saúde , Reino Unido/epidemiologia
2.
Child Adolesc Ment Health ; 28(2): 318-326, 2023 05.
Artigo em Inglês | MEDLINE | ID: mdl-35798687

RESUMO

BACKGROUND: Adolescents in secure psychiatric care typically report high obesity rates. However, longitudinal research exploring the rate and extent of change is sparse. This study aimed to analyse sex differences in longitudinal body mass index (BMI) change for adolescents receiving treatment in a secure psychiatric hospital. METHODS: The sample comprised 670 adolescents in secure psychiatric care. BMI trajectories from admission to 50 months of hospitalisation were produced using sex-stratified multilevel models. Systematic difference in mean BMI trajectories according to age at admission (14, 15, 16, or 17 years), medication (Olanzapine or Sodium Valproate), and primary diagnosis (Psychotic, non-Psychotic or Functional/behavioural disorders) were investigated. RESULTS: Together, males and females experienced a mean BMI increase of 2.22 m/kg2 over the 50-month period. For females, BMI increased from 25.69 m/kg2 to 30.31 m/kg2 , and for males, reduced from 25.01 m/kg2 to 23.95 m/kg2 . From 30 to 50 months, a plateau was observed for females and a reduction in BMI observed for males. Psychotic disorders in males (ß 3.87; CI 1.1-6.7) were associated with the greatest rate of BMI change. For medication, Olanzapine in females was associated with the greatest rate of change (ß1.78; CI -.89-4.47). CONCLUSIONS: This is the first longitudinal study exploring longitudinal BMI change for adolescent inpatients. Results highlight that individual differences in adolescent inpatients result in differing levels of risk to weight gain in secure care. Specifically, males with psychotic disorders and females taking Olanzapine present the greatest risk of weight gain. This has implications for the prioritisation of interventions for those most at risk of weight gain.


Assuntos
Pacientes Internados , Aumento de Peso , Adolescente , Feminino , Humanos , Masculino , Índice de Massa Corporal , Olanzapina/uso terapêutico , Estudos Longitudinais
3.
J Sport Exerc Psychol ; 40(1): 10-19, 2018 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-29521569

RESUMO

Using guidance from the reach, efficacy, adoption, implementation, and maintenance evaluation framework, we aimed to qualitatively evaluate the participant experiences of a workplace high-intensity interval training (HIIT) intervention. Twelve previously insufficiently active individuals (four males and eight females) were interviewed once as part of three focus groups. Perceptions of program satisfaction, barriers to and facilitators of adherence, and persistence to exercise were explored. HIIT initiates interest because of its novelty, provides a sense of accomplishment, and overcomes the barriers of perceived lack of time. The feeling of relatedness between the participants can attenuate negative unpleasant responses during the HIIT sessions. HIIT, in this workplace setting, is an acceptable intervention for physically inactive adults. However, participants were reluctant to maintain the same mode of exercise, believing that HIIT sessions were for the very fit.


Assuntos
Exercício Físico , Promoção da Saúde , Treinamento Intervalado de Alta Intensidade , Local de Trabalho , Adulto , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Motivação , Cooperação do Paciente , Satisfação do Paciente , Apoio Social
4.
J Behav Med ; 39(4): 574-86, 2016 08.
Artigo em Inglês | MEDLINE | ID: mdl-26915963

RESUMO

Few short messaging service (SMS) studies to support behaviour change have used a theoretical underpinning. Using a self-determination theory perspective, we explored the effects of need supportive (NS) SMS on physical activity in 65 (BMI = 24.06 kg/m(2), SD = 5.49; M = 25.76 years, SD = 10.23) insufficiently active individuals embarking on an existing exercise programme. For 10 weeks participants were randomised to an intervention group (NS) or control group (neutral). SMS were sent twice weekly, randomly, via an online SMS service. Mixed design ANCOVA and MANCOVA analyses of measures taken at baseline, mid and post intervention revealed increased levels of perceived autonomy support and psychological need satisfaction in the intervention group post intervention. Both groups reported increases in intrinsic motivation from pre to post intervention. Moderate intensity physical activity was greater in the intervention than the control group at 4-month post intervention with control group returning to baseline levels. Findings provide preliminary causal evidence to support the use of NS SMS to optimise physical activity behaviour change in individuals who are insufficiently active.


Assuntos
Exercício Físico/psicologia , Motivação , Autonomia Pessoal , Satisfação Pessoal , Apoio Social , Envio de Mensagens de Texto , Adulto , Feminino , Comportamentos Relacionados com a Saúde , Humanos , Masculino
5.
Qual Health Res ; 24(5): 706-18, 2014 May.
Artigo em Inglês | MEDLINE | ID: mdl-24692183

RESUMO

Grounded in Self-Determination Theory, we aimed to explore and identify key motivational processes involved in the transition from a physically inactive to an active lifestyle, and the processes involved in lapse and dropout behavior within a walking program. We implemented a qualitative, longitudinal case study method, using semistructured interviews and theoretical thematic analyses. Fifteen women were interviewed over 10 months and three profiles were generated: (a) nonadherence, (b) lapse/readoption of physical activity, and (c) adherence. Internalization of walking behavior was key to adherence. Satisfaction of the needs for competence and relatedness were central for participation during exercise at the adoption stages, and autonomy was particularly pertinent in facilitating adherence. Those who lapsed and restarted physical activity experienced feelings of autonomy at the point of readoption. Sources of support were driving forces in the adoption and adherence phases.


Assuntos
Conhecimentos, Atitudes e Prática em Saúde , Motivação , Atividade Motora , Pacientes Desistentes do Tratamento/psicologia , Autonomia Pessoal , Adolescente , Adulto , Inglaterra , Feminino , Teoria Fundamentada , Humanos , Estilo de Vida , Estudos Longitudinais , Pessoa de Meia-Idade , Pesquisa Qualitativa , Caminhada/psicologia , Adulto Jovem
6.
BMJ Open ; 13(10): e073453, 2023 10 27.
Artigo em Inglês | MEDLINE | ID: mdl-37890973

RESUMO

INTRODUCTION: The physical health of individuals with severe mental illness (SMI) is a cause for concern. While the purpose of inpatient mental health settings is rehabilitation and treatment, the physical health of hospitalised patients commonly deteriorates. Physical activity (PA) has been identified as an appropriate intervention to help improve the psychological and physical health of inpatients. We aim to address the gaps in the current literature by exploring how, why, for whom and in what contexts PA interventions help patients with SMI, who receive inpatient treatment, to increase their PA engagement. METHODS AND ANALYSIS: Realist synthesis: Six steps will be followed: (1) identification of the review question and scope of the review; (2) searching for evidence; (3) screening and appraisal; (4) extraction of data; (5) synthesis of the data and (6) dissemination. Five databases will be searched: Web of Science, PubMed, PsycINFO, PsychArticles and EmBase. A total of 10-15 stakeholders made up of academics and people living with SMI, sport and exercise therapists, psychiatrists, physiotherapists of low, medium and highly secure inpatient settings, will form an expert advisory group. They will provide their insight and knowledge of the secure setting contexts and perceived principles of how PA initiatives being undertaken in their hospitals for patients with SMI work, or not. The results will be published in accordance with the Realist And Meta-narrative Evidence Syntheses-Evolving Standards publication standards. ETHICS AND DISSEMINATION: Ethical approval has been granted. The review will produce context-specific guidance for Clinical Commissioning Groups and practitioners on how to optimise the provision of PA interventions for people with SMI in inpatient settings.


Assuntos
Transtornos Mentais , Psiquiatria , Humanos , Saúde Mental , Pacientes Internados , Transtornos Mentais/terapia , Exercício Físico
7.
Artigo em Inglês | MEDLINE | ID: mdl-35206176

RESUMO

This study explores healthcare professionals' experiences of using behavior change interventions in clinical practice. Semi-structured qualitative interviews were conducted with 11 healthcare professionals working in a cardiac and pulmonary rehabilitation National Health Service Trust in the United Kingdom. Interviews were transcribed and analyzed using inductive thematic analysis. Four overarching themes representing healthcare practitioners' perceptions of using behavior change interventions were identified: (1) reliance on experiential learning, (2) knowledge transition, (3) existing professional development programs, and (4) barriers and facilitators for continued professional development. The results are discussed in relation to the implications they may have for behavior change training in clinical healthcare practice. Healthcare professionals require bespoke and formalized training to optimize their delivery of behavior change interventions in cardiac and pulmonary rehabilitation. Doing so will enhance intervention fidelity and implementation that can potentially ameliorate patient rehabilitation outcomes.


Assuntos
Atitude do Pessoal de Saúde , Medicina Estatal , Pessoal de Saúde , Humanos , Pesquisa Qualitativa , Reino Unido
8.
Health Psychol Rev ; 15(2): 287-313, 2021 06.
Artigo em Inglês | MEDLINE | ID: mdl-31937185

RESUMO

Physical activity is a key determinant of mental health; community programmes aim to increase health and well-being on a community wide scale with emphasis on social interaction. Regular physical activity participation in community settings yields additional social benefits, such as peer support. This scoping review aimed to explore existing literature that has included peer support as a component of community-based physical activity programmes for MHSU. Published literature was examined using electronic databases (SportDiscus, Web of Science, MEDLINE, and PsycINFO), reference lists, and hand searching of journals. Thirteen eligible articles included; adults aged 18 and over, a peer support component, physical activity and/or sport, participants with mental health diagnoses and were community-based. Research published between 2007 and 2019, peer-reviewed and written in English was included. Nine studies found a significant increase in perceived social support, seven studies reported increased mental wellbeing and five studies reported increased physical activity levels. Effectiveness of reviewed programmes were categorised as; overall improvements in physical activity levels, improvements to mental health, exercise related psychosocial benefits, knowledge relating to self-care, and improved social connections. Community-based physical activity programmes produced psychosocial benefits and positive behaviour change for MHSU, warranting greater focus towards implementing effective peer support into community programmes.


Assuntos
Exercício Físico , Serviços de Saúde Mental , Adolescente , Adulto , Humanos , Grupo Associado , Apoio Social
9.
PLoS One ; 16(9): e0257685, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34587217

RESUMO

OBJECTIVE: High intensity interval training (HIIT) is a time-efficient exercise modality to improve cardiorespiratory fitness, and has recently been popularised by social media influencers. However, little is known regarding acute physiological and perceptual responses to these online protocols compared to HIIT protocols used within research. The aim was to investigate acute physiological, perceptual and motivational responses to two HIIT protocols popular on social media, and compare these to two evidence-based protocols. METHODS: Twenty-seven recreationally active (>1 exercise session /week) participants (Age: 22±3y, BMI: 24.3±2.4) completed a randomised cross-over study, whereby each participant completed four HIIT protocols, two already established in research (Ergo-60:60 (cycling 10x60s at 100%Wmaxwith 60s rest), BW-60:60 (body-weight exercises 10x60swith 60s rest)) and two promoted on social media (SM-20:10 (body-weight exercises 20x20swith 10s rest) and SM-40:20 (body-weight exercises 15x40s with 20s rest)). Blood lactate, heart rate (HR), feeling scale (FS), felt arousal scale (FSA), enjoyment and perceived competence were measured in response to each protocol. RESULTS: Significant differences were observed between BW-60:60 and SM-20:10 for the proportion of intervals meeting the ACSM high-intensity exercise criterion (>80% of HRmax) (BW-60:60 93±10%, SM-20:10 74±20%, P = 0.039) and change in lactate (BW-60:60 +7.8±3.7mmol/L, SM-20:10 +5.5±2.6mmol/L, P = 0.001). The percentage of time spent above the criterion HR was also significantly lower in SM-20:10 compared to all other protocols (Ergo-60:60 13.9±4.9min, BW-60:60 13.5±3.5min, SM-40:20 12.1±2.4min, SM-20:10 7.7±3.1, P<0.05). No differences were observed in lowest reported FS between protocols (P = 0.268), but FS decreased linearly throughout Ergo-60:60 and BW-60:60 (first vs. last interval P<0.05), but not in SM-20:10 or SM-40:20 (P>0.05). Enjoyment was higher upon completion of BW-60:60 compared to Ergo-60:60 and SM-40:20 (P<0.05). CONCLUSIONS: This study shows that HIIT protocols available on social media offer an interesting real-world alternative for promoting exercise participation. Future studies should continue to investigate these highly popular and practical HIIT protocols.


Assuntos
Aptidão Cardiorrespiratória/fisiologia , Coração/fisiologia , Treinamento Intervalado de Alta Intensidade/métodos , Ácido Láctico/sangue , Participação do Paciente/estatística & dados numéricos , Adulto , Peso Corporal , Estudos Cross-Over , Medicina Baseada em Evidências , Feminino , Promoção da Saúde , Frequência Cardíaca , Humanos , Masculino , Distribuição Aleatória , Mídias Sociais , Adulto Jovem
10.
Front Physiol ; 12: 750283, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34858205

RESUMO

Exercise referral schemes (ERS) are used to promote physical activity within primary care. Traditionally, ERS are conducted in a gym or leisure-center setting, with exercise prescriptions based on moderate-intensity continuous training (MICT). Home-based high-intensity interval training (Home-HIIT) has the potential to reduce perceived barriers to exercise, including lack of time and access to facilities, compared to traditional MICT prescription used with ERS and improve health related outcomes. We hypothesized that Home-HIIT would mediate greater improvement in cardiorespiratory fitness (CRF) by virtue of greater adherence and compliance to the exercise prescription, compared to MICT. Methods: Patients enrolled on an ERS (Liverpool, United Kingdom) were recruited for a pragmatic trial. Participants self-selected either 12 weeks of MICT (45-135 min/week at 50-70% HRmax) or Home-HIIT (4-9 min × 1 min intervals at ≥80% of HRmax, interspersed with 1 min rest). The primary outcome was the change in CRF (VO2 peak) at post-intervention (12 weeks) and follow-up (3-month post intervention), using intention-to-treat analysis. Results: 154 participants (age 48 ± 10y; BMI 30.5 ± 6.1 kg/m2) were recruited between October 2017 and March 2019, 87 (56%) participants chose Home-HIIT and 67 (44%) MICT. VO2 peak increased post-intervention in both groups (MICT 3.9 ± 6.0 ml.kg-1.min-1, Home-HIIT 2.8 ± 4.5 ml.kg-1.min-1, P < 0.001), and was maintained at follow-up (P < 0.001). Fat mass was only reduced post MICT (MICT -1.5 ± 6.3 kg, P < 0.05, Home-HIIT -0.2 ± 2.0 kg, P = 1.00), but the reduction was not maintained at follow-up (MICT -0.6 ± 5.1 kg, Home-HIIT 0.0 ± 2.2 kg, P > 0.05). Adherence to the prescribed programs was similar (MICT 48 ± 35%, Home-HIIT 39 ± 36%, P = 0.77). Conclusion: This is the first study to evaluate the use of Home-HIIT for individuals in a primary care setting. Contrary to our hypothesis, adherence to both exercise prescriptions was poor, and CRF improved to a similar extent in both groups with improvements maintained at 3-month follow-up. We provide evidence that, although not superior, Home-HIIT could be an effective and popular additional exercise choice for patients within primary care based ERS. Clinical Trial Registration: [ClinicalTrials.gov], identifier [NCT04553614].

11.
BMC Public Health ; 10: 578, 2010 Sep 27.
Artigo em Inglês | MEDLINE | ID: mdl-20875125

RESUMO

BACKGROUND: Following an extensive recruitment campaign, a 16-week lunchtime intervention to increase walking was implemented with insufficiently physically active University employees to examine programme feasibility and the effects of the programme in increasing walking behaviour, and in improving well-being and work performance. METHODS/DESIGN: A feasibility study in which participants were randomised to an immediate treatment or a delayed treatment control (to start at 10 weeks) group. For the first ten weeks of the intervention, participants took part in three facilitator-led group walks per week each of thirty minutes duration and were challenged to accumulate another sixty minutes of walking during the weekends. In the second phase of the intervention, the organised group walks ceased to be offered and participants were encouraged to self-organise their walks. Motivational principles were employed using contemporary motivational theory. Outcome measures (including self-reported walking, step counts, cardiovascular fitness, general and work-related well-being and work performance) were assessed at baseline, at the end of the 16-week intervention and (for some) four months after the end of the intervention. Process and outcome assessments were also taken throughout, and following, the intervention. DISCUSSION: The results of the intervention will determine the feasibility of implementing a lunchtime walking programme to increase walking behaviour, well-being and performance in sedentary employees. If successful, there is scope to implement definitive trials across a range of worksites with the aim of improving both employee and organisational health. TRIAL REGISTRATION: Current Controlled Trials ISRCTN81504663.


Assuntos
Eficiência , Saúde Mental , Saúde Ocupacional , Comportamento Sedentário , Caminhada , Emprego , Estudos de Viabilidade , Grupos Focais , Humanos , Projetos de Pesquisa
12.
Diabetes Care ; 42(12): 2330-2333, 2019 12.
Artigo em Inglês | MEDLINE | ID: mdl-31530660

RESUMO

OBJECTIVE: Adopt a multidisciplinary approach to evaluate a virtually supervised home-based high-intensity interval training (Home-HIT) intervention in people with type 1 diabetes. RESEARCH DESIGN AND METHODS: Eleven individuals with type 1 diabetes (seven women; age 30 ± 3 years; [Formula: see text] 2.5 ± 0.2 L/min; duration of diabetes 10 ± 2 years) completed 6 weeks of Home-HIT. A heart rate monitor and mobile phone application were used to provide feedback to the participants and research team on exercise intensity (compliance) and adherence. RESULTS: Training adherence was 95 ± 2%, and compliance was 99 ± 1%. Home-HIT increased [Formula: see text] by 7% (P = 0.017) and decreased insulin dose by 13% (P = 0.012). Blood glucose concentration did not change from baseline to immediately or 1 h post Home-HIT. Qualitative perceptions of Home-HIT and the virtual-monitoring system were positive, supporting that the intervention successfully removed exercise barriers in people with type 1 diabetes. CONCLUSIONS: Virtually monitored Home-HIT resulted in high adherence alongside increased [Formula: see text] and decreased insulin dose.


Assuntos
Diabetes Mellitus Tipo 1/terapia , Treinamento Intervalado de Alta Intensidade/métodos , Cooperação do Paciente/estatística & dados numéricos , Telemetria/métodos , Adulto , Glicemia/análise , Diabetes Mellitus Tipo 1/sangue , Diabetes Mellitus Tipo 1/psicologia , Feminino , Treinamento Intervalado de Alta Intensidade/psicologia , Humanos , Hipoglicemiantes/administração & dosagem , Insulina/administração & dosagem , Masculino , Aplicativos Móveis , Equipe de Assistência ao Paciente , Cooperação do Paciente/psicologia , Telemetria/psicologia , Resultado do Tratamento
13.
Int J Ment Health Nurs ; 27(6): 1776-1783, 2018 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-29847009

RESUMO

Individuals with severe mental illness engage in significantly less amounts of physical activity than the general population. A secure mental health setting can exacerbate barriers to exercise, and facilitate physical inactivity and sedentary behaviour. Healthcare assistants are intimately involved in the daily lives of patients and, therefore, should be considered integral to exercise promotion in secure mental health settings. Our aim was to explore healthcare assistants' perceptions of exercise and their attitudes to exercise promotion for adult patients in a secure mental health hospital. Qualitative semi-structured interviews were conducted with 11 healthcare assistants from a large UK-based secure mental health hospital. Topics included healthcare assistants' personal experiences of exercise within a secure facility, their perceptions of exercise as an effective treatment tool for mental health, and their perceived roles and responsibilities for exercise promotion. Thematic analysis was used to analyse the data. Three main themes were identified: (i) exercise is multi-beneficial to patients, (ii) perceived barriers to effective exercise promotion, and (iii) strategies for effectives exercise promotion. Healthcare assistants considered exercise to hold patient benefits. However, core organizational and individual barriers limited healthcare assistants' exercise promotion efforts. An informal approach to exercise promotion was deemed most effective to some, whereas others committed to more formal strategies including compulsory sessions. With education and organizational support, we propose healthcare assistants are well placed to identify individual needs for exercise promotion. Their consultation could lead to more efficacious, person-sensitive interventions.


Assuntos
Pessoal Técnico de Saúde , Exercício Físico , Promoção da Saúde , Hospitais Psiquiátricos , Adulto , Atitude do Pessoal de Saúde , Feminino , Promoção da Saúde/métodos , Hospitais Psiquiátricos/organização & administração , Humanos , Entrevistas como Assunto , Masculino , Transtornos Mentais/psicologia , Transtornos Mentais/terapia , Pessoa de Meia-Idade , Adulto Jovem
14.
Eur Psychiatry ; 54: 124-144, 2018 10.
Artigo em Inglês | MEDLINE | ID: mdl-30257806

RESUMO

Physical activity (PA) may be therapeutic for people with severe mental illness (SMI) who generally have low PA and experience numerous life style-related medical complications. We conducted a meta-review of PA interventions and their impact on health outcomes for people with SMI, including schizophrenia-spectrum disorders, major depressive disorder (MDD) and bipolar disorder. We searched major electronic databases until January 2018 for systematic reviews with/without meta-analysis that investigated PA for any SMI. We rated the quality of studies with the AMSTAR tool, grading the quality of evidence, and identifying gaps, future research needs and clinical practice recommendations. For MDD, consistent evidence indicated that PA can improve depressive symptoms versus control conditions, with effects comparable to those of antidepressants and psychotherapy. PA can also improve cardiorespiratory fitness and quality of life in people with MDD, although the impact on physical health outcomes was limited. There were no differences in adverse events versus control conditions. For MDD, larger effect sizes were seen when PA was delivered at moderate-vigorous intensity and supervised by an exercise specialist. For schizophrenia-spectrum disorders, evidence indicates that aerobic PA can reduce psychiatric symptoms, improves cognition and various subdomains, cardiorespiratory fitness, whilst evidence for the impact on anthropometric measures was inconsistent. There was a paucity of studies investigating PA in bipolar disorder, precluding any definitive recommendations. No cost effectiveness analyses in any SMI condition were identified. We make multiple recommendations to fill existing research gaps and increase the use of PA in routine clinical care aimed at improving psychiatric and medical outcomes.


Assuntos
Transtorno Bipolar/psicologia , Transtorno Depressivo Maior/psicologia , Exercício Físico/psicologia , Transtornos Psicóticos/psicologia , Esquizofrenia , Psicologia do Esquizofrênico , Aptidão Cardiorrespiratória , Humanos , Saúde Mental , Fisioterapeutas , Psiquiatria , Qualidade de Vida , Sociedades Médicas , Sociedades Científicas
15.
PLoS One ; 6(8): e21822, 2011.
Artigo em Inglês | MEDLINE | ID: mdl-21853021

RESUMO

BACKGROUND: Accurate objective assessment of sedentary and physical activity behaviours during childhood is integral to the understanding of their relation to later health outcomes, as well as to documenting the frequency and distribution of physical activity within a population. PURPOSE: To calibrate the Actigraph GT1M accelerometer, using energy expenditure (EE) as the criterion measure, to define thresholds for sedentary behaviour and physical activity categories suitable for use in a large scale epidemiological study in young children. METHODS: Accelerometer-based assessments of physical activity (counts per minute) were calibrated against EE measures (kcal x kg(-1) x hr(-1)) obtained over a range of exercise intensities using a COSMED K4b(2) portable metabolic unit in 53 seven-year-old children. Children performed seven activities: lying down viewing television, sitting upright playing a computer game, slow walking, brisk walking, jogging, hopscotch and basketball. Threshold count values were established to identify sedentary behaviour and light, moderate and vigorous physical activity using linear discriminant analysis (LDA) and evaluated using receiver operating characteristic (ROC) curve analysis. RESULTS: EE was significantly associated with counts for all non-sedentary activities with the exception of jogging. Threshold values for accelerometer counts (counts x minute(-1)) were <100 for sedentary behaviour and ≤2240, ≤3840 and ≥3841 for light, moderate and vigorous physical activity respectively. The area under the ROC curves for discrimination of sedentary behaviour and vigorous activity were 0.98. Boundaries for light and moderate physical activity were less well defined (0.61 and 0.60 respectively). Sensitivity and specificity were higher for sedentary (99% and 97%) and vigorous (95% and 91%) than for light (60% and 83%) and moderate (61% and 76%) thresholds. CONCLUSION: The accelerometer cut points established in this study can be used to classify sedentary behaviour and to distinguish between light, moderate and vigorous physical activity in children of this age.


Assuntos
Aceleração , Actigrafia/métodos , Comportamento/fisiologia , Atividade Motora/fisiologia , Comportamento Sedentário , Criança , Metabolismo Energético/fisiologia , Feminino , Humanos , Masculino , Curva ROC
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