Duncan S. Buchan
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View article: School-Based Homework Interventions for Improving 24-hour Movement Behaviours in Primary School Children: A Systematic Review and Meta-Analysis
School-Based Homework Interventions for Improving 24-hour Movement Behaviours in Primary School Children: A Systematic Review and Meta-Analysis Open
View article: Corrigendum to ‘Body Composition, Vascular Health, Cardiorespiratory Fitness, Lung Function, Muscle Architecture, and Physical Activity in People with Young Onset Dementia: A Case-Control Study’ [The American Journal of Medicine. 138:02 (2025) 277-286.e1]
Corrigendum to ‘Body Composition, Vascular Health, Cardiorespiratory Fitness, Lung Function, Muscle Architecture, and Physical Activity in People with Young Onset Dementia: A Case-Control Study’ [The American Journal of Medicine. 138:02 (2025) 277-286.e1] Open
View article: Immediate and One-Year Outcomes of an Asthma-Tailored Pulmonary Rehabilitation Programme in Overweight and Obese People with Difficult-to-Treat Asthma
Immediate and One-Year Outcomes of an Asthma-Tailored Pulmonary Rehabilitation Programme in Overweight and Obese People with Difficult-to-Treat Asthma Open
Pulmonary rehabilitation induced improvements in asthma-related outcomes including perception of breathlessness, asthma control, and exacerbation frequency at 1 year. Those with poorer baseline asthma control were more likely to benefit.
View article: Body Composition, Vascular Health, Cardiorespiratory Fitness, Lung Function, Muscle Architecture, and Physical Activity in People with Young Onset Dementia: A Case-Control Study
Body Composition, Vascular Health, Cardiorespiratory Fitness, Lung Function, Muscle Architecture, and Physical Activity in People with Young Onset Dementia: A Case-Control Study Open
This study highlights differences between people with young onset dementia and controls, underscoring the need for multicomponent exercise interventions. Future interventions should target muscle architecture, increase moderate-vigorous ph…
View article: Accelerometer-derived sleep metrics in mild and difficult-to-treat asthma
Accelerometer-derived sleep metrics in mild and difficult-to-treat asthma Open
View article: Exploring the feasibility of a cluster pilot randomised control trial to improve children’s 24-hour movement behaviours and dietary intake: Happy homework
Exploring the feasibility of a cluster pilot randomised control trial to improve children’s 24-hour movement behaviours and dietary intake: Happy homework Open
We aimed to explore the feasibility, acceptability, and potential efficacy of Happy Homework (HH); an 8-week home-focussed intervention, with the purpose of encouraging children's positive dietary behaviours and engagement in positive phys…
View article: Development and Evaluation of Sedentary Time Cut-Points for the activPAL in Adults Using the GGIR R-Package
Development and Evaluation of Sedentary Time Cut-Points for the activPAL in Adults Using the GGIR R-Package Open
The purpose of this study was to develop sedentary cut-points for the activPAL and evaluate their performance against a criterion measure (i.e., activPAL processed by PALbatch). Part 1: Thirty-five adults (23.4 ± 3.6 years) completed 12 la…
View article: A Total Diet Replacement Weight Management Program for Difficult-to-Treat Asthma Associated With Obesity
A Total Diet Replacement Weight Management Program for Difficult-to-Treat Asthma Associated With Obesity Open
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View article: Comparison of physical activity metrics from two research-grade accelerometers worn on the non-dominant wrist and thigh in children
Comparison of physical activity metrics from two research-grade accelerometers worn on the non-dominant wrist and thigh in children Open
This study compared physical activity metrics from the activPAL (AP) worn on the thigh with the ActiGraph worn on the non-dominant wrist using open-source methods. Measures included average acceleration, intensity gradient (IG) and the min…
View article: Handgrip Strength Cut-Points for Cardiometabolic Risk Identification in U.S. Younger Population
Handgrip Strength Cut-Points for Cardiometabolic Risk Identification in U.S. Younger Population Open
Identification of cardiometabolic risk (CMR) in U.S. younger population by assessing muscular strength via handgrip (HG) dynamometry may aid in prevention efforts. Currently, no nationally representative HG cut-points are available for ide…
View article: Comparing the activPAL CREA and GHLA Algorithms for the Classification of Postures and Activity in Free-Living Children
Comparing the activPAL CREA and GHLA Algorithms for the Classification of Postures and Activity in Free-Living Children Open
The activPAL accelerometer has been used extensively in research to assess sedentary behaviour (SB) and physical activity (PA) outcomes. The aim of this study was to assess the comparability of PA and SB outcomes from two automated algorit…
View article: A pragmatic randomised controlled trial of tailored pulmonary rehabilitation in participants with difficult-to-control asthma and elevated body mass index
A pragmatic randomised controlled trial of tailored pulmonary rehabilitation in participants with difficult-to-control asthma and elevated body mass index Open
View article: A Personalized Smartphone-Delivered Just-in-time Adaptive Intervention (JitaBug) to Increase Physical Activity in Older Adults: Mixed Methods Feasibility Study
A Personalized Smartphone-Delivered Just-in-time Adaptive Intervention (JitaBug) to Increase Physical Activity in Older Adults: Mixed Methods Feasibility Study Open
Background Just-in-time adaptive interventions (JITAIs) provide real time in-the-moment behavior change support to people when they need it most. JITAIs could be a viable way to provide personalized physical activity (PA) support to older …
View article: Physical activity levels in asthma: relationship with disease severity, body mass index and novel accelerometer-derived metrics
Physical activity levels in asthma: relationship with disease severity, body mass index and novel accelerometer-derived metrics Open
Patients with asthma may feel limited in physical activity (PA). Reduced PA has been demonstrated in asthmatics versus healthy controls, and increasing PA associated with improved asthma outcomes. Obesity is commonly found with difficult-t…
View article: Equivalence of activity outcomes derived from three research grade accelerometers worn simultaneously on each wrist
Equivalence of activity outcomes derived from three research grade accelerometers worn simultaneously on each wrist Open
This study evaluated the equivalence of activity outcomes from three accelerometer brands worn on both wrists during free living. Forty-four adults wore a GENEActiv, ActiGraph and Axivity accelerometer for 7 days. Outcomes were assessed be…
View article: Feasibility and Acceptability of a Classroom-Based Active Breaks Intervention for 8–12-Year-Old Children
Feasibility and Acceptability of a Classroom-Based Active Breaks Intervention for 8–12-Year-Old Children Open
Purpose: This study explored the feasibility of conducting a classroom-based active breaks intervention on sedentary behavior (SB), physical activity (PA) and attention in 8-12-year-old children. Methods: Eight schools were r…
View article: A Personalized Smartphone-Delivered Just-in-time Adaptive Intervention (JitaBug) to Increase Physical Activity in Older Adults: Mixed Methods Feasibility Study (Preprint)
A Personalized Smartphone-Delivered Just-in-time Adaptive Intervention (JitaBug) to Increase Physical Activity in Older Adults: Mixed Methods Feasibility Study (Preprint) Open
BACKGROUND Just-in-time adaptive interventions (JITAIs) provide real time in-the-moment behavior change support to people when they need it most. JITAIs could be a viable way to provide personalized physical activity (PA) support t…
View article: The Effects of Socioeconomic Status on Parent and Child Moderate-to-Vigorous Physical Activity and Body Mass Index
The Effects of Socioeconomic Status on Parent and Child Moderate-to-Vigorous Physical Activity and Body Mass Index Open
Purpose: Physical inactivity and overweight status has been linked to low socioeconomic status (SES) in youth. Parents are known to influence both their child's weight and physical activity (PA). The relationship between parent and …
View article: Generation and validation of ActiGraph GT3X+ accelerometer cut-points for assessing physical activity intensity in older adults. The OUTDOOR ACTIVE validation study
Generation and validation of ActiGraph GT3X+ accelerometer cut-points for assessing physical activity intensity in older adults. The OUTDOOR ACTIVE validation study Open
The study of physical activity in older adults is becoming more and more relevant. For evaluation of physical activity recommendations, intensity-specific accelerometer cut-points are utilized. However, research on accelerometer cut-points…
View article: Cardio-Metabolic Risk Factors in Scottish South Asian and Caucasian Youth
Cardio-Metabolic Risk Factors in Scottish South Asian and Caucasian Youth Open
(1) Background: Scotland has one of the highest rates of obesity in the Western World, it is well established that poor weight profiles, and particularly abdominal obesity, is strongly associated with Type II diabetes and cardiovascular di…
View article: High Intensity Interval Training (HIIT) Improves Cardiorespiratory Fitness (CRF) in Healthy, Overweight and Obese Adolescents: A Systematic Review and Meta-Analysis of Controlled Studies
High Intensity Interval Training (HIIT) Improves Cardiorespiratory Fitness (CRF) in Healthy, Overweight and Obese Adolescents: A Systematic Review and Meta-Analysis of Controlled Studies Open
Background: High Intensity Interval Training (HIIT) is a sustainable and effective method for improving Cardiorespiratory Fitness (CRF) in adolescents. HIIT is proven to produce equal or greater improvements in CRF when compared to moderat…
View article: Grip Strength Cut Points for Diabetes Risk Among Apparently Healthy U.S. Adults
Grip Strength Cut Points for Diabetes Risk Among Apparently Healthy U.S. Adults Open
View article: An Insight Into the Involvement of Mothers of Low Socioeconomic Status in Scottish Primary School Health Education Activities
An Insight Into the Involvement of Mothers of Low Socioeconomic Status in Scottish Primary School Health Education Activities Open
School-based health activities that involve parents are more likely to be effective for child health and well-being than activities without a parent component. However, such school-based interventions tend to recruit the most motivated par…
View article: Re-examination of 1- vs. 3-Sets of Resistance Exercise for Pre-spaceflight Muscle Conditioning: A Systematic Review and Meta-Analysis
Re-examination of 1- vs. 3-Sets of Resistance Exercise for Pre-spaceflight Muscle Conditioning: A Systematic Review and Meta-Analysis Open
Background: Recommendations on resistance training (RT) set-volume protocols in preparation for spaceflight muscular strength conditioning remains equivocal. A meta-analysis was performed on the effects of single-set (S), or three-s…
View article: A feasibility study with process evaluation of a teacher led resource to improve measures of child health
A feasibility study with process evaluation of a teacher led resource to improve measures of child health Open
Previous school-based interventions have produced positive effects upon measures of children's health and wellbeing but such interventions are often delivered by external experts which result in short-term effects. Thus, upskilling and exp…
View article: A comparison of activity levels of girls in single-gender and mixed-gender physical education
A comparison of activity levels of girls in single-gender and mixed-gender physical education Open
This study examined whether single-gender or mixed-gender PE lessons were more conducive to increasing the physical activity levels of girls. One hundred and twenty girls (12–15 years) wore a wGT3x+ActiGraph accelerometer while participati…
View article: Comparing the effect of wrist placement upon activity outcomes and Euclidean Norm Minus One (ENMO) from ActiGraph GT3X+ accelerometers
Comparing the effect of wrist placement upon activity outcomes and Euclidean Norm Minus One (ENMO) from ActiGraph GT3X+ accelerometers Open
This study evaluated agreement between activity outcomes and Euclidean Norm Minus One (ENMO) from accelerometers worn in a laboratory and free-living setting. Part 1: Thirty-seven participants (25.5 ± 10.5 years) completed laboratory-based…
View article: The use of the intensity gradient and average acceleration metrics to explore associations with measures of health and wellbeing in children
The use of the intensity gradient and average acceleration metrics to explore associations with measures of health and wellbeing in children Open
This study used the intensity gradient (IG) and average acceleration metrics to describe children’s activity profiles and explore associations with body mass index (BMI) z-score. Two hundred and forty-six children (n = 138 girls) aged 9.6 …
View article: Segmented sedentary time and physical activity patterns throughout the week from wrist-worn ActiGraph GT3X+ accelerometers among children 7–12 years old
Segmented sedentary time and physical activity patterns throughout the week from wrist-worn ActiGraph GT3X+ accelerometers among children 7–12 years old Open
View article: Sprint Interval Training and the School Curriculum: Benefits Upon Cardiorespiratory Fitness, Physical Activity Profiles, and Cardiometabolic Risk Profiles of Healthy Adolescents
Sprint Interval Training and the School Curriculum: Benefits Upon Cardiorespiratory Fitness, Physical Activity Profiles, and Cardiometabolic Risk Profiles of Healthy Adolescents Open
Background : This study examined the impact of a 4-week school-based sprint interval training program on cardiorespiratory fitness (CRF), daily physical activity (PA) behavior, and cardiometabolic risk (CMR) outcomes in adolescents. Method…