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 327 Results

Activity Behaviors in British 6-Year-Olds: Cross-Sectional Associations and Longitudinal Change During the School Transition

Background: To explore activity behaviors at school entry, we describe temporal/demographic associations with accelerometer- measured physical activity in a population-based sample of British 6-year-olds, and examine change from ages 4 to 6. Methods: A total of 712 six-year-olds (308 at both ages) wore Actiheart accelerometers for ≥ 3 (mean 6.0) days. We derived minutes per […]

Related Product: Actiheart

Publication Date: August 11, 2022


Reshaping the Path of Mild Cognitive Impairment by Refining Exercise Prescription: A Study Protocol of a Randomized Controlled Trial to Understand the “What”,“For Whom”, and “How” of Exercise to Promote Cognitive Function

Background: Targeted exercise training is a promising strategy for promoting cognitive function and preventing dementia in older age. Despite the utility of exercise as an intervention, variation still exists in exercise induced cognitive gains and questions remain regarding the type of training (i.e., what), as well as moderators (i.e., for whom) and mechanisms (i.e., how) […]

Related Product: MotionWatch

Publication Date: August 2, 2022


The Role of Sleep and Eating Patterns in Adiposity Gain among Preschool-Aged Children

Background Short sleep duration is related to risk for obesity in preschool children. However, the underlying mechanism(s) are not clear. Objective We evaluated the relationship between sleep characteristics with body composition, energetics and weight-regulating behaviors in preschool-aged children; and the longitudinal associations between children’s sleep and eating patterns with body composition at 1-year follow-up. Methods […]

Related Product: Actiheart

Publication Date: July 14, 2022


Longitudinal associations of absolute versus relative moderate-to-vigorous physical activity with brain microstructural decline in aging

Higher moderate-to-vigorous intensity (MVPA) may preserve brain structural integrity, but evidence is mostly cross-sectional and relies on absolute PA measures. We examined longitudinal associations of absolute MVPA using population-level activity count thresholds and relative MVPA using individual heart rate reserve (HRR) via Actiheart with subsequent changes in brain diffusion tensor imaging (DTI) over average of […]

Related Product: Actiheart

Publication Date: May 8, 2022


Is the skull responsive to bone mineralisation stimuli in children?

Background Whole-body-less-head (WBLH) is the recommended skeletal region of interest (ROI) for dual-energy X-ray absorptiometry (DXA) assessment of bone mineral density (BMD) in children. Historically it has been suggested that the skull is less responsive than the rest of the skeleton to stimuli that affect BMD but there are few published data to support this […]

Related Product: Actiheart

Publication Date: April 12, 2022


The influence of clinic care on perceptions and knowledge of non-communicable diseases and physical activity from a low-resourced community: a mixed-method study

Background Health promotion for the management of risk factors for non-communicable diseases (NCDs) is an integral part of standard care in South Africa. Most persons presenting with NCDs utilise public primary health care centres for disease management. This mixed-methods study aimed at expanding current understanding of the the influence of standard clinic care (usual care) […]

Related Product: Actiheart

Publication Date: April 7, 2022


Testing Function Focused Care for Acute Care using the Evidence Integration Triangle: Protocol description

This manuscript provides the protocol for a National Institute of Aging-funded cluster randomized clinical trial that focuses on helping nurses in acute care to engage patients with dementia in physical activity while hospitalized using an approach referred to as function-focused care. Physical activity is defined as bodily movement produced by skeletal muscles resulting in the […]

Related Product: MotionWatch

Publication Date: March 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


A Population Analysis Approach using Mobility Data and Correlation Networks for Depression Episodes Detection

Depression is one of the common mental illnesses that is impacting millions of people around the world. Although here are numerous clinical diagnostic procedures available, the majority of them are predominantly based on selfreporting of patients and/or observational assessment by clinicians. Recent studies show that depression could alter the motor skills and lessen the overall […]

Related Product: MotionWatch

Publication Date: January 24, 2022


Low physical activity is associated with two hypokinetic motor abnormalities in psychosis

Individuals with schizophrenia engage in more sedentary behavior than healthy controls, which is thought to contribute to multiple health adversities. Age, medication side effects and environment are critical determinants of physical activity in psychosis. While motor abnormalities are frequently observed in psychosis, their association with low physical activity has received little interest. Here, we aimed […]

Related Product: MotionWatch

Publication Date: January 18, 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


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


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


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


Use of Actigraphy (Wearable Digital Sensors to Monitor Activity) in Heart Failure Randomized Clinical Trials: A Scoping Review

Background Actigraphy-based measurements of physiologic parameters may enable design of patient-centric heart failure (HF) clinical trials. Recently, the Heart Failure Collaboratory focused on recommendations for meaningful change and use of actigraphy as an end point in HF clinical trials. We aimed to evaluate randomized controlled trials (RCTs) that have quantified the impact of HF interventions […]

Related Product: MotionWatch

Publication Date: September 28, 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


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


The Impact of Cognitive impairment on Clinical Symptoms, Physical Activity and Care Interactions among Residents in Assisted Living Settings

The purpose of this study was to describe differences in pain, behavioral symptoms, quality of staff-resident interactions, participation in function focused care and physical activity among residents with and without cognitive impairment in assisted living. This was a secondary data analysis using baseline data from an ongoing trial testing Function Focused Care for Assisted Living […]

Related Product: MotionWatch

Publication Date: September 2, 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


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


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


A novel algorithm to detect non-wear time from raw accelerometer data using deep convolutional neural networks

To date, non-wear detection algorithms commonly employ a 30, 60, or even 90 mins interval or window in which acceleration values need to be below a threshold value. A major drawback of such intervals is that they need to be long enough to prevent false positives (type I errors), while short enough to prevent false […]

Related Product: Actiheart

Publication Date: April 23, 2021


The courses of objective physical activity and the association with sleepiness during a 2-week-on/2-week-off offshore shift rotation: an observational repeated-measures study

Background Offshore workers are assumed to have poor health behaviours, but no studies have yet examined physical activity (PA) during a full offshore shift rotation period, including both work and at home periods. Furthermore, the relationship of PA with sleepiness, a prevalent safety hazard offshore, is not known. This study aimed to examine (1) the […]

Related Product: MotionWatch

Publication Date: April 17, 2021


Longitudinal associations of physical activity, sedentary time, and cardiorespiratory fitness with arterial health in children–the PANIC study

We investigated the longitudinal associations of physical activity (PA), sedentary time (ST), and cardiorespiratory fitness (CRF) with arterial health among children. In our primary analyses, we investigated 245 children (girls 51.8%) aged 6-9 years participating in the baseline examinations who had data on arterial health at 2-year follow-up. We also utilized a subsample of 90 […]

Related Product: Actiheart

Publication Date: April 8, 2021


Physical activity is associated with lower pulsatile stress but not carotid stiffness in children

The cardiovascular disease (CVD) process may begin early in life when accompanied by atherosclerotic risk factors. CVD risk factors in children are associated with stiffening of the large elastic arteries, a reflection of subclinical atherosclerosis. Physical activity is a preventative lifestyle strategy that may benefit arterial stiffness by attenuating the hemodynamic stress on the artery […]

Related Product: MotionWatch

Publication Date: March 12, 2021


Personalized ESM monitoring and feedback to support psychological treatment for depression: a pragmatic randomized controlled trial (Therap-i)

Background Major depressive disorder (MDD) is a highly prevalent mental disorder with large disease burden, high levels of relapse or persistence, and overall suboptimal outcomes of protocolized pharmacological and psychotherapeutic treatments. There is an urgent need to improve treatment effectiveness, possibly through systematic treatment personalization. In psychotherapeutic treatments this can be achieved by case conceptualization. […]

Related Product: MotionWatch

Publication Date: March 10, 2021


Longitudinal observational study to prevent fractures in older individuals with musculoskeletal ambulatory disability symptom complex: the first-year data and effects in the COVID-19 pandemic

We evaluated physical function, physical activity, and sleep status in five elderly individuals with musculoskeletal ambulatory disability symptom complex (MADS) for one year, and examined their influential factors associated with sarcopenia. Compared with the baseline, the results did not show significant differences in every item. Notably, the COVID-19 pandemic had occurred throughout Japan for nearly […]

Related Product: MotionWatch

Publication Date: March 9, 2021


Resting skeletal muscle ATGL and CPT1b are associated with peak fat oxidation rates in men and women but do not explain observed sex‐differences

We explored key proteins involved in fat metabolism that might be associated with peak fat oxidation (PFO) and account for sexual dimorphism in fuel metabolism during exercise. Thirty‐six healthy adults [15 women; 40 ± 11 years of age; peak oxygen consumption 42.5 ± 9.5 ml (kg body mass)–1 min–1; mean ± SD] completed two exercise […]

Related Product: Actiheart

Publication Date: March 6, 2021


Differences in Daytime Activity Levels and Daytime Sleep Between Night and Day Duty: An Observational Study in Italian Orthopedic Nurses

Working nonstandard work schedules is often associated with increased sedentary behavior and risk of sleep disorders. Night shift workers are prone to accumulating sleep debt, which they recover by sleeping during the day. The effect on daytime activity levels is unknown. The present study aims to objectively assess whether daytime sleep could affect daytime activity […]

Related Product: MotionWatch

Publication Date: February 26, 2021


Determinants of peak fat oxidation rates during cycling in healthy men and women

This study explored lifestyle and biological determinants of peak fat oxidation (PFO) during cycle ergometry, using duplicate measures to account for day-to-day variation. Seventy-three healthy adults (age range: 19–63 years; peak oxygen consumption [˙VO2peak]:42.4[10.1]ml⋅kgBM−1⋅min−1; n = 32 women]) completed trials 7–28 days apart that assessed resting metabolic rate, a resting venous blood sample, and PFO by indirect calorimetry during […]

Related Product: Actiheart

Publication Date: February 14, 2021


Isotemporal Substitution of Time Between Sleep and Physical Activity: Associations With Cardiovascular Risk Factors in Early Rheumatoid Arthritis

Objective We aimed to determine relationships between objectively measured nightly sleep, sedentary behavior (SB), light physical activity (LPA), and moderate to vigorous physical activity (MVPA) with risk factors for cardiovascular disease (CVD) in patients with early rheumatoid arthritis (RA). Furthermore, we aimed to estimate consequences for these risk factors of theoretical displacements of 30 minutes […]

Related Product: Actiheart

Publication Date: February 11, 2021


The independent and interactive associations of physical activity intensity and vitamin D status with bone mineral density in prepubertal children: the PANIC Study

Summary It is unclear how physical activity intensity and vitamin D status are related to bone health in prepubertal children. We found positive associations between vitamin D status and moderate-to-vigorous physical activity with bone in boys and girls. This highlights the importance of lifestyle factors for skeletal health prepuberty. Introduction The sex-specific independent and interactive […]

Related Product: Actiheart

Publication Date: February 5, 2021


Feasibility, Reliability, and Validity of the MotionWatch 8 to Evaluate Physical Activity Among Older Adults With and Without Cognitive Impairment in Assisted Living Settings

This study tested the feasibility, reliability, and validity of the MotionWatch 8 among assisted living residents with and without cognitive impairment. Data from the Dissemination and Implementation of Function Focused Care in Assisted Living Using the Evidence Integration Triangle study were used. The sample included 781 individuals from 85 facilities with a mean age of […]

Related Product: MotionWatch

Publication Date: December 25, 2020


Testing the Implementation of Function-focused Care in Assisted Living Settings

Objectives The purpose of this study was to evaluate the Function-Focused Care for Assisted Living Using the Evidence Integration Triangle (FFC-AL-EIT) intervention. Design FFC-AL-EIT was a randomized controlled pragmatic trial including 85 sites and 794 residents. Intervention FFC-AL-EIT was implemented by a Research Nurse Facilitator working with a facility champion and stakeholder team for 12 […]

Related Product: MotionWatch

Publication Date: October 31, 2020


A phase 2a randomised, double-blind, placebo-controlled, parallel-group, add-on clinical trial of ebselen (SPI-1005) as a novel treatment for mania or hypomania

Rationale Lithium is an effective prophylactic and anti-manic treatment in bipolar disorder; however, its use is declining through perceived poor tolerance and toxicity. Lithium inhibits inositol monophosphatase (IMPase), a probable key therapeutic mechanism. The anti-inflammatory drug, ebselen, also inhibits IMPase and appears well-tolerated and safe. Objectives To assess the efficacy of adjunctive ebselen in mania […]

Related Product: MotionWatch

Publication Date: September 9, 2020


Multiple sclerosis-related fatigue: the role of impaired corticospinal responses and heightened exercise fatigability

It is unclear whether motor fatigability and perceived fatigue share a common pathophysiology in people with multiple sclerosis (PwMS). This cross-sectional investigation explored the relationship between the mechanisms of motor fatigability from cycling and fatigue severity in PwMS. Thirteen highly fatigued (HF) and thirteen non-fatigued (LF) PwMS, and thirteen healthy controls (CON) completed a step-test […]

Related Product: MotionWatch

Publication Date: September 2, 2020


Determinants of physical activity in young wheelchair-user with spina bifida

Objective: To explore associations between physical activity and peak oxygen uptake (VO2peak), age, sex, and Hoffer classification in young wheelchair-users with spina bifida. Design: Exploratory study. Subjects: Dutch children (age 5-19 years) with spina bifida who use a manual wheelchair. Methods: For the dependent variable physical activity, data from 2 physical activity monitors were analysed: […]

Related Product: Actiheart

Publication Date: August 17, 2020


Using Mobile Electroencephalography and Actigraphy to Diagnose Attention-Deficit/Hyperactivity Disorder: Case-Control Comparison Study

Background: Children with attention-deficit/hyperactivity disorder (ADHD), a neurobehavioral disorder, display behaviors of inattention, hyperactivity, or impulsivity, which can affect their ability to learn and establish proper family and social relationships. Various tools are currently used by child and adolescent psychiatric clinics to diagnose, evaluate, and collect information and data. The tools allow professional physicians to […]

Related Product: MotionWatch

Publication Date: June 19, 2020


A pragmatic approach to the comparison of wrist-based cutpoints of physical activity intensity for the MotionWatch8 accelerometer in children

Background A variety of wearable monitors are available for objectively assessing physical activity but there is a lack of established values for the activity intensity of MotionWatch8 (MW8) and a similar lack of studies on comparability across devices. Our study aimed to establish activity intensity cutpoints for the MW8 accelerometer in children, which are necessary […]

Related Product: MotionWatch

Publication Date: June 19, 2020


Leptin and the Retinal Microvasculature in Young Black and White Adults: The African-PREDICT Study

Background Leptin is a vasoactive peptide that has been linked to diseases associated with macrovascular deterioration. What is still uncertain is its involvement in the microvasculature. Since microvascular changes are presumed to precede macrovascular deterioration, we examined whether measures of the retinal microvasculature are associated with leptin in healthy, young Black and White individuals. Method […]

Related Product: Actiheart

Publication Date: June 13, 2020


Exploring human trainability: Design and rationale of studies of twin responses to understand exercise as a THerapy (STRUETH) study

Background Exercise confers myriad health benefits and physical inactivity is a modifiable risk factor for many non-communicable chronic diseases. However, individual responsiveness to guideline-based exercise programs is idiosyncratic for health and fitness outcomes. It is not known whether the response of individuals to distinct exercise modalities tend to be concordant or whether there is a […]

Related Product: Actiheart

Publication Date: June 9, 2020


The day-to-day reliability of peak fat oxidation and FATMAX

PURPOSE:Prior studies exploring the reliability of peak fat oxidation (PFO) and the intensity that elicits PFO (FATMAX) are often limited by small samples. This study characterised the reliability of PFO and FATMAX in a large cohort of healthy men and women. METHODS:Ninety-nine adults [49 women; age: 35 (11) years; [Formula: see text]O2peak: 42.2 (10.3) mL·kg […]

Related Product: Actiheart

Publication Date: June 1, 2020


Skeletal muscle of females and males with constitutional thinness: a low intramuscular lipid content and oxidative profile

Constitutional thinness (CT) is a non-pathological state of underweight. The present study aimed to explore skeletal muscle energy storage in individuals with constitutional thinness and to further characterize muscle phenotype at baseline and in response to overfeeding. Thirty subjects with CT (15 females, 15 males) and 31 normal-weight control subjects (16 females, 15 males) participated […]

Related Product: Actiheart

Publication Date: June 1, 2020


Rationale and Study Design of OUTSTEP‐HF: A Randomized Controlled Study to Assess the Effect of Sacubitril/Valsartan and Enalapril on Physical Activity measured by Accelerometry in Patients with Heart Failure with Reduced Ejection Fraction

Aim In PARADIGM‐HF, sacubitril/valsartan demonstrated superiority to enalapril in reducing mortality and morbidity in patients with heart failure (HF) with reduced ejection fraction (HFrEF). Several patient‐centred outcomes like improved physical activity and quality of life (QoL) have been emphasised as important therapy goals in HF management. OUTSTEP‐HF has been designed to evaluate the effects of […]

Related Product: MotionWatch

Publication Date: May 28, 2020


Blood pressure and nitric oxide synthesis capacity in physically active and inactive groups: the SABPA study

Physical activity affects the vasculature through mechanisms related to nitric oxide bioavailability, oxidative stress, and inflammation; with endothelial function at the centre of this triad. In a South African setting, with the prevalence of hypertension and physical inactivity being alarmingly high, we aimed to investigate relationships of vascular function with markers of oxidative stress, inflammation […]

Related Product: Actiheart

Publication Date: May 7, 2020


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