Publications

CamNtech Research Library

CamNtech products have been trusted by specialist researchers for over 25 years.

Our research library contains peer reviewed publications citing the use of our devices.

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Found 756 Results

An Exploratory Study on the Physical Activity Health Paradox—Musculoskeletal Pain and Cardiovascular Load during Work and Leisure in Construction and Healthcare Workers

Using a novel approach, this exploratory study investigated whether the physical activity (PA) paradox extends to cardiovascular load and musculoskeletal pain. At baseline, 1–2 days of 24 h heart rate was assessed in 72 workers from construction and healthcare. Workers then reported pain intensity in 9 body regions (scale 0–3) every 6 months for two […]

Related Product: Actiheart

Publication Date: March 26, 2022


Exercise Intervention Changes the Perceptions and Knowledge of Non-Communicable Disease Risk Factors among Women from a Low-Resourced Setting

We employed the Health Belief Model (HBM) as a theoretical lens to explore the influence of an exercise intervention on the perceptions and knowledge of modifiable risk factors for non-communicable diseases (NCDs) among women from a low-resource setting in South Africa. We used a mixed-methods design, gathering qualitative and quantitative data at baseline (n = […]

Related Product: Actiheart

Publication Date: March 15, 2022


Intensity of occupational physical activity in blue-collar workers: do self-reported rating and device-worn measurements agree?

Purpose High intensity occupational physical activity (OPA) seem to aggravate health and increase risk of sick leave and early retirement. Most intensity of OPA monitoring has been self-reported, e.g. by rating of perceived exertion (RPE). However, no studies have investigated the precision and risk of bias in RPE reporting during free-living OPA. This study investigated […]

Related Product: Actiheart

Publication Date: March 10, 2022


Health‐related quality of life for normal glycaemia, prediabetes and type 2 diabetes mellitus: cross‐sectional analysis of the ADDITION‐PRO study

Aims We estimated and compared health-related quality of life for individuals with normal glucose tolerance, prediabetes and diabetes. Methods Participants in the ADDITION-PRO study, Denmark, who attended a health assessment between 2009 and 2011, and who completed the 3-level EuroQoL 5-dimensions (EQ-5D-3L) questionnaire were included. For the present study, they were classified as normal glucose […]

Related Product: Actiheart

Publication Date: March 6, 2022


Descriptive epidemiology of cardiorespiratory fitness in UK adults: The Fenland Study

Background Cardiorespiratory fitness is rarely measured in population studies. Most studies of fitness do not examine differences by population subgroups or seasonal trends. Methods We used a validated submaximal exercise test to measure fitness in 5976 women and 5316 men, residing in England. We expressed fitness as maximal oxygen consumption per kilogram total body mass […]

Related Product: Actiheart

Publication Date: March 1, 2022


Parasympathetic regulation in the classroom differentially predicts preschoolers’ socially competent behaviors

Research shows that children’s early social competence predicts their later academic and interpersonal success. Accordingly, early childhood education programs increasingly aim to evaluate and support children’s social skill development. Despite ample theoretical and empirical work demonstrating the role of the parasympathetic nervous system (PNS) in supporting neurophysiological processes that underlie social behaviors, no study has […]

Related Product: Actiheart

Publication Date: February 20, 2022


The association of sickle‐cell trait with β‐cell dysfunction and physical activity in adults living with and without HIV in Tanzania

This study aimed to investigate sickle cell trait (SCT) associations with physical activity, markers of insulin secretion and resistance, and glucose among people living with HIV infection (PLWH), both antiretroviral therapy (ART) naive and experienced, and HIV-uninfected adults. This was a cross-sectional study conducted in Mwanza, Northwestern Tanzania. We used data of 668 participants attained […]

Related Product: Actiheart

Publication Date: February 15, 2022


Lipid-based nutrient supplement at initiation of antiretroviral therapy does not substitute energy from habitual diet among HIV patients–a secondary analysis of data from a randomised controlled trial in Ethiopia

Introduction Malnutrition is common among people with HIV in sub-Saharan Africa. Nutritional supplementation at initiation of antiretroviral treatment (ART) has shown beneficial effects, but it is not known if supplementation replaces or supplements the habitual energy intake in a context of food insecurity. Methods As part of a randomised controlled trial among people with HIV […]

Related Product: Actiheart

Publication Date: February 11, 2022


Long-term evolution of N-terminal pro-brain natriuretic peptide levels and exercise capacity in 132 left ventricular assist device recipients

OBJECTIVES N-terminal pro-brain natriuretic peptide (NT-proBNP) is a widely used biomarker in clinical practice in the context of heart failure. Little is known about the long-term evolution of NT-proBNP levels in left ventricular assist device (LVAD) recipients. Besides this, the potential correlation of NT-proBNP with exercise capacity on the long term after LVAD implantation has […]

Related Product: Actiheart

Publication Date: February 10, 2022


Obesity due to Steroid Receptor Coactivator-1 deficiency is associated with endocrine and metabolic abnormalities

Context Genetic variants affecting the nuclear hormone receptor coactivator Steroid Receptor Coactivator, SRC-1, have been identified in people with severe obesity and impair melanocortin signaling in cells and mice. As a result, obese patients with SRC-1 deficiency are being treated with a Melanocortin 4 receptor agonist in clinical trials. Objective Here, our aim was to […]

Related Product: Actiheart

Publication Date: February 8, 2022


Assessment of activity energy expenditure during competitive golf: The effects of bag carrying, electric or manual trolleys

Golf is a sport played around the globe, with an estimated 42.6 million people playing within the United Kingdom and United States of America alone. To date there is limited data on the energy expenditure of golf. The present study assessed the activity energy expenditure (AEE) of 16 high-standard (handicap under 5) golfers who completed […]

Related Product: Actiheart

Publication Date: January 30, 2022


Levels and correlates of physical activity and capacity among HIV-infected compared to HIV-uninfected individuals

Introduction In the HIV-infected individuals, physical activity improves physical strength, quality of life and reduces the risk of developing non-communicable diseases. In Sub-Saharan Africa, HIV-infected patients report being less active compared to HIV-uninfected individuals. We assessed the levels and correlates of objectively measured physical activity and capacity among HIV-infected antiretroviral therapy (ART)-naive individuals compared to […]

Related Product: Actiheart

Publication Date: January 21, 2022


Emotion Dysregulation and Heart Rate variability Improve in US Veterans Undergoing Treatment for Posttraumatic Stress Disorder: Secondary Exploratory Analyses from a Randomised Controlled Trial

Background: Emotion regulation (ER) is a key process underlying posttraumatic stress disorder (PTSD), yet, little is known about how ER changes with PTSD treatment. Understanding these effects may shed light on treatment processes. Methods. We recently completed a randomised controlled trial demonstrating that a breathing-based yoga practice (Sudarshan kriya yoga; SKY) was not clinically inferior […]

Related Product: Actiheart

Publication Date: January 10, 2022


Physical Activity and Dietary Composition Relate to Differences in Gut Microbial Patterns in a Multi-Ethnic Cohort —The HELIUS Study

Physical activity (PA) at recommended levels contributes to the prevention of non-communicable diseases, such as atherosclerotic cardiovascular disease (asCVD) and type 2 diabetes mellitus (T2DM). Since the composition of the gut microbiota is strongly intertwined with dietary intake, the specific effect of exercise on the gut microbiota is not known. Moreover, multiple other factors, such […]

Related Product: Actiheart

Publication Date: December 9, 2021


Correlations Between Physical Activity Level, Quality of Life, and Cognitive Performance in Elderly Individuals Engaging in Multi-Year Dance Activities

Introduction: It is well-acknowledged that cognitive and physical decline associated with aging can be prevented or reduced with the engagement in regular physical activity (PA). Dance activities combine cardiovascular, cognitive, and coordinative demands, providing a popular leisure PA among elderly. This study examined the correlations between quality of life (QoL), cognitive and physical performance, and […]

Related Product: Actiheart

Publication Date: December 5, 2021


Is there an association between socioeconomic status and the degree of diurnal variation in heart rate?

Background Disruption in circadian rhythms is associated with cardiovascular disease and may play a role in socioeconomic differences in cardiovascular disease prevalence. However, it is unclear whether low SES is associated with a lower diurnal rhythm in autonomic activity markers. We investigated the association between SES and the amplitude of the daily fluctuation of heart […]

Related Product: Actiheart

Publication Date: November 27, 2021


Breakfast Consumption Suppresses Appetite but Does Not Increase Daily Energy Intake or Physical Activity Energy Expenditure When Compared with Breakfast Omission in Adolescent Girls Who Habitually Skip Breakfast: A 7-Day Randomised Crossover Trial

With concerns that adolescent girls often skip breakfast, this study compared the effects of breakfast consumption versus breakfast omission on free-living physical activity (PA) energy expenditure (PAEE) and dietary intakes among adolescent girls classified as habitual breakfast skippers. The participants went through two 7-day conditions in a trial with a crossover design: daily standardised breakfast […]

Related Product: Actiheart

Publication Date: November 26, 2021


Association of Combined Slow Gait and Low Activity Fragmentation With Later Onset of Cognitive Impairment

Importance: Among older people, slow walking is an early indicator of risk for Alzheimer disease (AD). However, studies that have assessed this association have not considered that slow walking may have different causes, some of which are not necessarily associated with higher AD risk. Objective: To evaluate whether low activity fragmentation among older adults with […]

Related Product: Actiheart

Publication Date: November 18, 2021


Infant physiological activity and the early emergence of social communication

Early in life, social engagement is facilitated by effective regulation during times of rest and stress. Physiological regulation during social play and in response to sudden environmental changes or social stressors may play an important role in sustaining social engagement in infancy and facilitate the acquisition of early social-communication skills. The aim of this study […]

Related Product: Actiheart

Publication Date: November 1, 2021


The use of Multi-Sensory Environments with autistic children: Exploring the effect of having control of sensory changes

Multi-Sensory Environments (also called sensory or Snoezelen® rooms) are specialised spaces that contain equipment to modify the environment. They are commonly used in special-needs schools with autistic children, but empirical investigation into how to best use Multi-Sensory Environments with autistic children has been limited. Based on converging evidence that autistic children may benefit from having […]

Related Product: Actiheart

Publication Date: October 24, 2021


Longitudinal and cross‐sectional associations of adherence to 24‐hour movement guidelines with cardiometabolic risk

This study aimed to examine (1) adherence to 24 h movement guidelines over a 2 years follow-up in children aged 6–8 years and (2) association of this adherence with cardiometabolic risk factors. Physical activity and sleep were assessed by a monitor combining heart rate and accelerometry measurements. Screen time was reported by the parents. Body […]

Related Product: Actiheart

Publication Date: October 13, 2021


Rheumatoid cachexia in early rheumatoid arthritis: prevalence and associated variables

Objective Rheumatoid cachexia (RC) is prevalent among patients with established rheumatoid arthritis (RA). Although changes in muscle mass and fat mass have been reported in early RA, these findings have not been classified according to existing RC definitions. This study aimed to describe the prevalence of RC and associated variables in patients with early RA. […]

Related Product: Actiheart

Publication Date: October 13, 2021


Resistance but not endurance exercise training induces changes in cerebrovascular function in healthy young subjects

It is generally considered that regular exercise maintains brain health and reduces the risk of cerebrovascular diseases such as stroke and dementia. Since the benefits of different “types” of exercise are unclear, we sought to compare the impacts of endurance and resistance training on cerebrovascular function. In a randomized and crossover design, 68 young healthy […]

Related Product: Actiheart

Publication Date: October 11, 2021


Heart Rate Variability and Muscle Strength in Young Adults with Sedentary Behaviour

Introduction: Sedentary behaviour or physical inactivity has been relatively prevalent among young adults globally. Multiple studies pointed out that Malaysia has been listed as one of the Asian countries with high prevalence of inactivity. Objective: This study aimed to examine the heart rate variability (HRV) and muscle strength among young adults in order to identify […]

Related Product: Actiheart

Publication Date: September 30, 2021


Omega-3 supplementation during unilateral resistance exercise training in older women: a within subject and double-blind placebo-controlled trial

Background & aims The skeletal muscle anabolic effects of n-3 polyunsaturated fatty acids (n-3 PUFA) appear favoured towards women; a property that could be exploited in older women who typically exhibit poor muscle growth responses to resistance exercise training (RET). Here we sought to generate novel insights into the efficacy and mechanisms of n-3 PUFA […]

Related Product: Actiheart

Publication Date: September 29, 2021


Infants’ physiological and behavioral reactivity to maternal mobile phone use–An experimental study

The present study examined the impact of maternal mobile phone use during mother-child interaction on infants’ physiological and behavioral reactivity (i.e., heart rate and negative affect). In this experimental study, 106 mother-infant (M age = 11.88 months; 51% male) dyads were randomly assigned to one of three experimental conditions. All conditions started and ended with […]

Related Product: Actiheart

Publication Date: September 28, 2021


Anodal tDCS augments and preserves working memory beyond time-on-task deficits

Transcranial direct current stimulation (tDCS) of the left dorsolateral prefrontal cortex (DLPFC) has been shown to promote working memory (WM), however, its efficacy against time-on-task-related performance decline and associated cognitive fatigue remains uncertain. This study examined the impact of anodal tDCS of the left DLPFC on performance during a fatiguing visuospatial WM test. We adopted […]

Related Product: Actiheart

Publication Date: September 27, 2021


Light-intensity physical activity and mental ill health: a systematic review of observational studies in the general population

Background Most of the evidence has focused on examining the influence of moderate-to-vigorous intensity physical activity on mental health, but he role of light intensity physical activity (LIPA) is less understood. The purpose of this systematic review was to assess the relationship between time spent in LIPA and mental ill health across the lifespan. Methods […]

Related Product: Actiheart

Publication Date: September 15, 2021


Exploring the Effect of Long Naps on Handball Performance and Heart Rate Variability

This study explored the effect of long naps on handball-related performance and assessed the role of the cardiac autonomic nervous system in this process. Eleven male collegiate handball players performed a repeated sequential trial consisting of a 20-m consecutive turnaround run, 10-m run with a load, and shooting the ball into a target. Participants were […]

Related Product: Actiheart

Publication Date: September 15, 2021


The association between hyperactive behaviour and cognitive inhibition impairments in young children.

Hyperactivity is one of the core features of attention-deficit hyperactivity disorder (ADHD), and yet there is evidence that hyperactive behavior in children with ADHD is not ubiquitous and could be a compensatory response to high cognitive demands. No research has yet objectively measured hyperactive behavior in young children who are demonstrating early signs of ADHD […]

Related Product: Actiheart

Publication Date: September 10, 2021


Cost-effectiveness of physical activity intervention in children–results based on the Physical Activity and Nutrition in Children (PANIC) study

Background We assessed the cost-effectiveness of a 2-year physical activity (PA) intervention combining family-based PA counselling and after-school exercise clubs in primary-school children compared to no intervention from an extended service payer’s perspective. Methods The participants included 506 children (245 girls, 261 boys) allocated to an intervention group (306 children, 60 %) and a control group […]

Related Product: Actiheart

Publication Date: September 6, 2021


Visuospatial Working Memory under Fatigue: Observations with Cerebral Hemodynamics and Heart Rate Variability

Visuospatial working memory (WM) is a central component of human executive function within safety-critical systems, where the interactions between fatigue due to timeon-task and WM capacity remain critical yet under-explored dimensions. In this work, we investigated the temporal dynamics of brain activation, functional connectivity, and heart-rate variability (HRV) during a fatiguing visuospatial two-back test. We […]

Related Product: Actiheart

Publication Date: September 1, 2021


Glucose variability and low bone turnover in people with type 2 diabetes

Introduction Type 2 diabetes (T2D) is related to an increased fracture risk and low bone turnover. However, the mechanisms are not elucidated. In the present study we investigate the association between glycemic variability and bone turnover markers. Methods 100 participants with T2D and 100 age and gender matched controls were included in this cross-sectional study. […]

Related Product: Actiheart

Publication Date: August 27, 2021


Association of Physical Activity With Maximal and Submaximal Tests of Exercise Capacity in Middle-and Older-Aged Adults

Although physical activity (PA) is an important determinant of exercise capacity, the association between these constructs is modest. The authors investigated the associations of self-reported and objectively measured PA with maximal and submaximal tests of exercise capacity. Participants aged ≥40 years (N = 413; 49.6% female) completed a PA questionnaire, wore a uniaxial accelerometer (5.2 ± 1.1 days), and […]

Related Product: Actiheart

Publication Date: August 18, 2021


Preoperative walking recommendation for non-cardiac surgery patients to reduce the length of hospital stay: a randomized control trial

Background Even though the importance of preparing patients for a surgical event is recognized, there are still gaps about the benefit of improving functional capacity by walking during the waiting time among patients scheduled for non-cardiac surgery. The aim of this study was to evaluate the impact of pre-surgical walking in-hospital length of stay, early […]

Related Product: Actiheart

Publication Date: July 28, 2021


Use of the Polar V800 and Actiheart 5 heart rate monitors for the assessment of heart rate variability (HRV) in horses

Heart rate variability (HRV) is a commonly used metric in animal science to quantify an aspect of the physiological response to stressors. HRV analysis relies upon accurate detection of the electrical activity of the heart to define inter-beat interval (IBI). In horses, this can be problematic due to specific features of the equine ECG waveform […]

Related Product: Actiheart

Publication Date: July 19, 2021


Heart Rate Variability and Long Chain n-3 Polyunsaturated Fatty Acids in Chronic Kidney Disease Patients on Haemodialysis: A Cross-Sectional Pilot Study

Low heart rate variability (HRV) is independently associated with increased risk of sudden cardiac death (SCD) and all cardiac death in haemodialysis patients. Long chain n-3 polyunsaturated fatty acids (LC n-3 PUFA) may exert anti-arrhythmic effects. This study aimed to investigate relationships between dialysis, sleep and 24 h HRV and LC n-3 PUFA status in […]

Related Product: Actiheart

Publication Date: July 18, 2021


Sex-Specific Relationship between the Cardiorespiratory Fitness and Plasma Metabolite Patterns in Healthy Humans—Results of the KarMeN Study

Cardiorespiratory fitness (CRF) represents a strong predictor of all-cause mortality and is strongly influenced by regular physical activity (PA). However, the biological mechanisms involved in the body’s adaptation to PA remain to be fully elucidated. The aim of this study was to systematically examine the relationship between CRF and plasma metabolite patterns in 252 healthy […]

Related Product: Actiheart

Publication Date: July 17, 2021


A randomized controlled trial to isolate the effects of fasting and energy restriction on weight loss and metabolic health in lean adults

Intermittent fasting may impart metabolic benefits independent of energy balance by initiating fasting-mediated mechanisms. This randomized controlled trial examined 24-hour fasting with 150% energy intake on alternate days for 3 weeks in lean, healthy individuals (0:150; n = 12). Control groups involved a matched degree of energy restriction applied continuously without fasting (75% energy intake […]

Related Product: Actiheart

Publication Date: July 13, 2021


Effect of napping on a bean bag chair on sleep stage, muscle activity, and heart rate variability

Although ample evidence has demonstrated that daytime napping is beneficial for health and cognitive performance, bedding for napping has not yet been scientifically investigated. In this study, we assessed the effect of a bean bag chair (BC), which would automatically adjust according to body shape and size, on daytime napping and physiological parameters related to […]

Related Product: Actiheart

Publication Date: July 8, 2021


How can we better prepare new doctors for the tasks and challenges of ward rounds?: An observational study of junior doctors’ experiences

Purpose Ward rounds play a crucial role in the delivery of patient care in inpatient settings, but involve a complex mix of tasks, skills and challenges for junior doctors to negotiate. This study informs the development of high-quality training by identifying the activities that junior doctors perform, and those associated with stress during real-life ward […]

Related Product: Actiheart

Publication Date: July 5, 2021


A feedforward neural network for drone accident prediction from physiological signals

Purpose As drones are rapidly transforming tasks such as mapping and surveying, safety inspection and progress monitoring, human operators continue to play a critical role in ensuring safe drone missions in compliance with safety regulations and standard operating procedures. Research shows that operator’s stress and fatigue are leading causes of drone accidents. Building upon the […]

Related Product: Actiheart

Publication Date: June 9, 2021


Registration of 24-hour accelerometric rest-activity profiles and its application to human chronotypes

By collecting data continuously over 24 hours, accelerometers and other wearable devices can provide novel insights into circadian rhythms and their relationship to human health. Existing approaches for analyzing diurnal patterns using these data, including the cosinor model and functional principal component analysis, have revealed and quantified population-level diurnal patterns, but considerable subject-level variability remained […]

Related Product: Actiheart

Publication Date: May 31, 2021


Sleep duration regularity as a predictor of the cardiovascular response to acute exercise

High-intensity exercise represents a challenge for the cardiovascular system, especially under conditions of insufficient sleep. For example, following one night of partial sleep restriction, healthy young men exhibited increased heart rate, minute ventilation, and plasma lactate concentration during submaximal and maximal exercise compared to one night of normal sleep [1]. In addition to sleep duration, […]

Related Product: Actiheart

Publication Date: May 31, 2021


Effects of short-term graded dietary carbohydrate intake on intramuscular and whole-body metabolism during moderate-intensity exercise

Altering dietary carbohydrate (CHO) intake modulates fuel utilization during exercise. However, there has been no systematic evaluation of metabolic responses to graded changes in short-term (< 1 week) dietary CHO intake. Thirteen active men performed interval running exercise combined with isocaloric diets over 3 days before evaluation of metabolic responses to 60-min running at 65% […]

Related Product: Actiheart

Publication Date: May 27, 2021


Adolescent Endurance Runners Exhibit Suboptimal Energy Availability and Intakes of Key Nutrients

Backgroud: Despite the evidence of an elevated prevalence of low bone mass in adolescent endurance runners, reports on dietary intake in this population is limited. Objectives: This study aimed to evaluate energy availability (EA) and dietary intake among 72 (n = 60 female, n = 12 male) high school cross-country runners. Methods: The sample consisted of a combined dataset […]

Related Product: Actiheart

Publication Date: May 25, 2021


Low Physical Activity Is Associated With Impaired Endothelial Function in Patients With Type 2 Diabetes and Controls After 5 Years of Follow-up

Background: The long-term association between physical activity and endothelial function has not previously been investigated in patients with type 2 diabetes. Therefore, we aimed to evaluate the relationship between physical activity and endothelial function, estimated by peripheral arterial tonometry, in patients with type 2 diabetes and non-diabetic controls after 5 years of follow-up. Methods: : […]

Related Product: Actiheart

Publication Date: May 20, 2021


Socio‐economic inequalities, modifiable lifestyle risk factors and retinal vessel calibers: The African‐PREDICT Study

Objective Lifestyle risk factors vary between socioeconomic status (SES) groups and may influence cardiovascular function differently. The retinal microvasculature allows for monitoring early changes in cardiovascular health, therefore we investigated whether retinal vessel calibers associate differently with modifiable risk factors in different SES groups. Methods We included 1064 young adults (aged 20-30 years) grouped by […]

Related Product: Actiheart

Publication Date: May 19, 2021


Heart rate and heart rate variability as outcomes and longitudinal moderators of treatment for pain across follow-up in Veterans with Gulf War illness

Aims Accumulating evidence suggests Gulf War illness (GWI) is characterised by autonomic nervous system dysfunction (higher heart rate [HR], lower heart rate variability [HRV]). Yoga – an ancient mind-body practice combining mindfulness, breathwork, and physical postures – is proposed to improve autonomic dysfunction yet this remains untested in GWI. We aimed to determine (i) whether […]

Related Product: Actiheart

Publication Date: May 11, 2021


Cohort Profile: Multimorbidity in Children and Youth Across the Life-course (MY LIFE) Study

Objective This manuscript serves to provide an overview of the methods of the Multimorbidity in Children and Youth across the Life-course (MY LIFE) study, profile sample characteristics of the cohort, and provide baseline estimates of multimorbidity to foster collaboration with clinical and research colleagues across Canada. Method MY LIFE is comprised of 263 children (2–16 […]

Related Product: Actiheart

Publication Date: May 1, 2021


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