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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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
The effects of a 2-year physical activity and dietary intervention on plasma lipid concentrations in children: the PANIC Study
Purpose We studied the effects of a physical activity and dietary intervention on plasma lipids in a general population of children. We also investigated how lifestyle changes contributed to the intervention effects. Methods We carried out a 2-year controlled, non-randomized lifestyle intervention study among 504 mainly prepubertal children aged 6–9 years at baseline. We assigned […]
Related Product: Actiheart
Publication Date: April 24, 2020
Bidirectional associations of momentary affect with physical activity and sedentary behaviors in working adults
Background Affective experiences and movement-based behaviors form a system that has been shown to influence exercise adherence and mental health outcomes. Little is known about the naturalistic dynamics of the reciprocal associations in this system. Purpose We examined the time intervals at which momentary affect precedes and follows movement-based behaviors in everyday life. Methods A […]
Related Product: Actiheart
Publication Date: April 1, 2020
Quantifying Habitual Physical Activity and Sedentariness in Older Adults—Different Outcomes of Two Simultaneously Body-Worn Motion Sensor Approaches and a Self-Estimation
Applicable and accurate assessment methods are required for a clinically relevant quantification of habitual physical activity (PA) levels and sedentariness in older adults. The aim of this study is to compare habitual PA and sedentariness, as assessed with (1) a wrist-worn actigraph, (2) a hybrid motion sensor attached to the lower back, and (3) a […]
Related Product: MotionWatch
Publication Date: March 28, 2020
Building a device-free system to prevent fractures in older people with musculoskeletal ambulatory disability symptom complex
This study aimed to measure the physical ability to cope with daily life and perceptions of older people at high risk of sarcopenia. We surveyed parameters to predict the risk of sarcopenia and factors worsening the condition. We used a pretest among five participants to check the relevance and validation of measures for (1) physical […]
Related Product: MotionWatch
Publication Date: March 15, 2020
A combination of metabolites predicts adherence to the Mediterranean diet pattern and its associations with insulin sensitivity and lipid homeostasis in the general population: the Fenland Study, United Kingdom
Background Cardiometabolic benefits of the Mediterranean diet have been recognized, but underlying mechanisms are not fully understood. Objectives We aimed to investigate how the Mediterranean diet could influence circulating metabolites and how the metabolites could mediate the associations of the diet with cardiometabolic risk factors. Methods Among 10,806 participants (58.9% women, mean age = 48.4 […]
Related Product: Actiheart
Publication Date: March 1, 2020
Chronobiological aspects of sleep restriction modulate subsequent spontaneous physical activity
Purpose First evidence suggests that chronobiological aspects of sleep restriction affect metabolic conditions. Our aim was to investigate whether spontaneous free-living physical activity likewise is affected by chronobiological timing of short sleep. Methods In an experimental randomized, balanced cross-over design, eleven healthy, normal-weight (BMI: 23.9 ± 0.4 kg/m2) men were evaluated. Physical activity was assessed […]
Related Product: MotionWatch
Publication Date: March 1, 2020
Child-related and parental predictors for thelarche in a general population of girls: the PANIC study
Background Obesity has been associated with earlier thelarche, whereas other predictors for it remain unclear. Methods We studied child-related and parental predictors for earlier thelarche in 195 girls aged 6–8 years followed up for 2 years. A physician evaluated breast development by inspection and palpation. Body fat percentage (BF%) was measured by dual-energy X-ray absorptiometry, […]
Related Product: Actiheart
Publication Date: February 20, 2020
Distinct inflammatory mediator patterns in young black and white adults: The African-predict study
Objective Inflammatory mediators have been implicated in the early stages of cardiovascular disease development, including hypertension. Since global reports reflect a higher hypertension prevalence in black than white populations, we hypothesise the involvement of specific inflammatory mediators. We therefore compared a detailed range of 22 inflammatory mediators between young black and white adults, and determined […]
Related Product: Actiheart
Publication Date: February 1, 2020
Reliability and Validity of the Checklist for Function-Focused Care in Service Plans
The purpose of this study was to test the reliability and validity of the Checklist for Function-Focused Care in Service Plans. Function-focused care is a care approach that optimizes function and physical activity during all care interactions. This study used baseline data from the first cohort of the study titled Dissemination and Implementation of Function-Focused […]
Related Product: MotionWatch
Publication Date: January 1, 2020
Physical activity in rheumatoid arthritis: relationship to cardiovascular risk factors, subclinical atherosclerosis, and disease activity
Objective: To investigate associations between physical activity and risk factors for cardiovascular disease (CVD), subclinical atherosclerosis, and disease activity in patients with early and long-standing rheumatoid arthritis (RA). Method: This cross-sectional study included 84 patients with early and 37 with long-standing RA (disease duration, mean ± sd: 1.4 ± 0.4 and 16.3 ± 2.3 years, […]
Related Product: Actiheart
Publication Date: January 1, 2020
Health promotion and cardiovascular risk reduction in people with spinal cord injury: physical activity, healthy diet and maintenance after discharge—protocol for a prospective national cohort study and a preintervention-postintervention study
ntroduction Spinal cord injury (SCI) predisposes those who suffer from it to physical inactivity and weight gain; consequently, death due to cardiovascular diseases is more frequent among people with SCI than in the general population. The literature documents a consensus about an interdisciplinary multimodal approach for the prevention and treatment of cardiovascular risk factors including […]
Related Product: Actiheart
Publication Date: December 31, 2019
Habitual physical activity is associated with lower fasting and greater glucose-induced GLP-1 response in men
Rationale The hormone glucagon-like peptide-1 (GLP-1) decreases blood glucose and appetite. Greater physical activity (PA) is associated with lower incidence of type 2 diabetes. While acute exercise may increase glucose-induced response of GLP-1, it is unknown how habitual PA affects GLP-1 secretion. We hypothesised that habitual PA associates with greater glucose-induced GLP-1 responses in overweight […]
Related Product: Actiheart
Publication Date: December 1, 2019
The impact of physical activity and function on falls in assisted living residents
The purpose of this study was to describe physical activity and function of older adults in assisted living communities and test the association between moderate and vigorous activity and falls. This study used baseline data from 393 participants from the first two cohorts in the Function-Focused Care in Assisted Living Using the Evidence Integration Triangle […]
Related Product: MotionWatch
Publication Date: December 1, 2019
Quality of life, physical activity and cardiorespiratory fitness in black African women: B-Healthy project
Purpose To study the associations between physical activity (PA), cardiorespiratory fitness (CRF), and health-related quality of life (HRQoL) in black African women from a low socioeconomic community in South Africa. Methods Black African women (n = 146) aged 35–75 years from a low socioeconomic community in South Africa participated in this study. We measured PA levels via […]
Related Product: Actiheart
Publication Date: November 26, 2019
Electrically assisted cycling for individuals with type 2 diabetes mellitus: protocol for a pilot randomized controlled trial
Background The global incidence of type 2 diabetes mellitus (T2DM) is increasing. Given the many complications associated with T2DM, effective management of the disease is crucial. Physical activity is considered to be a key component of T2DM management. However, people with T2DM are generally less physically active than individuals without T2DM and adherence to physical […]
Related Product: Actiheart
Publication Date: November 23, 2019
The accumulation of deficits approach to describe frailty
The advancing age of the participants of the European Prospective Investigation into Cancer and Nutrition (EPIC)—Potsdam study was the incentive to investigate frailty as a major parameter of ageing. The aim of this study was to develop a multidimensional tool to measure frailty in an ageing, free-living study population. The “accumulation of deficits approach” was […]
Related Product: Actiheart
Publication Date: October 15, 2019
Gender differences in function, physical activity, falls, medication use, and life satisfaction among residents in assisted living settings
The purpose of the current study was to test for gender differences among residents living in assisted living settings. This was a secondary data analysis using data from the first 64 facilities participating in the ongoing Function Focused Care for Assisted Living study using the Evidence Integration Triangle (FFC-AL-EIT). A total of 593 residents were […]
Related Product: MotionWatch
Publication Date: October 9, 2019
Association of Total Daily Physical Activity and Fragmented Physical Activity With Mortality in Older Adults
Importance Fragmented daily physical activity may be a sign of physiological decline that provides more powerful insight into impending mortality than total daily activity. Objective To compare and contrast the association between total daily activity and activity fragmentation, which encompasses activity bouts and duration, and mortality risk. Design, Setting, and Participants In this cohort study, […]
Related Product: Actiheart
Publication Date: October 2, 2019
An Indoor Therapeutic Garden for Behavioral Symptoms in Alzheimer’s Disease: A Randomized Controlled Trial
Background: Behavioral and psychological symptoms of dementia (BPSD) affect 60-90% of patients with Alzheimer’s disease (AD). Objective: To determine if environmental therapy is an effective strategy to reduce BPSD, we tested 163 patients with AD with Neuropsychiatric Inventory (NPI) before and after 6 months of an indoor therapeutic garden (TG) or standard environment. Methods: A […]
Related Product: Actiheart
Publication Date: October 1, 2019
Associations of physical activity, sedentary time, and cardiorespiratory fitness with heart rate variability in 6-to 9-year-old children: the PANIC study
Purpose To study the associations of physical activity (PA), sedentary time (ST), and cardiorespiratory fitness (CRF) with heart rate variability (HRV) in children. Methods The participants were a population sample of 377 children aged 6–9 years (49% boys). ST, light PA (LPA), moderate PA (MPA), vigorous PA (VPA), and moderate-to-vigorous PA (MVPA), and PA energy […]
Related Product: Actiheart
Publication Date: September 18, 2019
Home Monitoring to Track Activity and Sleep Patterns Among Older Adults: A Feasibility Study
Measuring changes in activity and sleep over time is important for research and practice. While commercially available home monitoring systems passively track these parameters, the feasibility, acceptability, and usefulness of new products need to be evaluated. We tested a commercially available system for providing long-term data on activity and sleep with 10 single women (mean […]
Related Product: MotionWatch
Publication Date: September 13, 2019
The effects of a single night of complete and partial sleep deprivation on physical and cognitive performance: A Bayesian analysis
This study investigated the effects of complete and partial sleep deprivation on multiple aspects of athletic performance. Ten males completed a cognitive function test, maximal handgrip strength, countermovement jump (CMJ) and a 15 min all out cycling test to assess aerobic performance. These tests were performed following 3 different sleep conditions; normal sleep (CON), a […]
Related Product: Actiheart
Publication Date: September 5, 2019
Physical activity and sedentary behaviour in children with spina bifida
Aim To describe active and sedentary time in children with spina bifida and to compare their physical activity on weekdays versus weekends. Method In this exploratory cross‐sectional study, data from 13 Canadian and 22 Dutch children with spina bifida (14 females, 21 males; mean age 10y 11mo, standard deviation [SD] 3y 6mo, range 5y 6mo–18y; […]
Related Product: Actiheart
Publication Date: August 30, 2019
LoRa Evaluation in Mobility Conditions for a Connected Smart Shoe Measuring Physical Activity
A strong and positive association between increased levels of physical activity, exercise participation and improved health in older adults emerges from research studies. It is consequently relevant to measure not only the amount of physical exercise performed during planned sessions, but also the level of activity all over the daytime. This paper presents a wearable […]
Related Product: MotionWatch
Publication Date: August 19, 2019
Revisiting the MotionWatch 8: Calibrating cut-points for measuring physical activity and sedentary behaviour among adults with stroke
Reduced moderate-to-vigorous physical activity (MVPA) and increased sedentary behavior (SB) are common following stroke, which can limit stroke recovery and contribute to greater cognitive decline. Hence, the MVPA and SB of adults with stroke should be measured concurrently using objective methods. One currently available method for objectively measuring MVPA and SB is the MotionWatch8© (MW8). […]
Related Product: MotionWatch
Publication Date: August 5, 2019
The Effects of an Adapted Community Sports Camp (“GAME ON”) on Functional Mobility, and Fitness in Children and Adolescents With Cerebral Palsy (CP)
Our interdisciplinary team has developed a community-based camp “GAME ON” that actively engages children and adolescents with CP in learning new motor skills and improving their functional mobility and fitness. We emphasize the activities used in the camp and the outcome measures to monitor participants’ progress. We present the results from a feasibility study that […]
Related Product: Actiheart
Publication Date: August 1, 2019
Physical Activity for Symptom Management in Women With Metastatic Breast Cancer: A Randomized Feasibility Trial on Physical Activity and Breast Metastases
Context Physical activity for women with early-stage breast cancer is well recognized for managing cancer-related symptoms and improving quality of life. While typically excluded from interventions, women with metastatic breast cancer may also benefit from physical activity. Objective To 1) determine the safety and feasibility of a physical activity program for women with metastatic breast […]
Related Product: Actiheart
Publication Date: July 30, 2019
Can psychomotor disturbance predict ECT outcome in depression?
Psychomotor symptoms are core features of melancholic depression. This study investigates whether psychomotor disturbance predicts the outcome of electroconvulsive therapy (ECT) and how the treatment modulates psychomotor disturbance. In 73 adults suffering from major depressive disorder psychomotor functioning was evaluated before, during and after ECT using the observer-rated CORE measure and objective measures including accelerometry […]
Related Product: MotionWatch
Publication Date: July 29, 2019
Variation in gravimetric correction factors for nephelometer-derived estimates of personal exposure to PM2. 5
Many portable monitors for quantifying mass concentrations of particulate matter air pollution rely on aerosol light scattering as the measurement method; however, the relationship between scattered light (what is measured) and aerosol mass concentration (the metric of interest) is a complex function of the refractive index, size distribution, and shape of the particles. In this […]
Related Product: Actiheart
Publication Date: July 1, 2019
Objectively assessed physical activity and weight status of primary school children in Germany with and without migration backgrounds. Public health
Objectives Many children are insufficiently active, and children with a migration background appear to be even less active and at a higher risk of developing obesity. This study evaluated the weight status, and the frequencies and intensities of objectively assessed physical activity (PA) of children with and without a migration background. Study design Cross-sectional study. […]
Related Product: Actiheart
Publication Date: June 27, 2019
Impact of Function Focused Care and Physical Activity on Falls in Assisted Living Residents
Background There continues to be a belief among nurses, patients, and families that physical activity increases the risk of falling. Purpose The purpose of this study was to test the hypothesis that controlling for age, function, cognition, medication use, gender, comorbidities, and cognition, residents who are exposed to Function Focused Care for Assisted Living (FFC-AL-EIT) […]
Related Product: MotionWatch
Publication Date: June 21, 2019
Is high aerobic workload at work associated with leisure time physical activity and sedentary behaviour among blue-collar workers? A compositional data analysis based on accelerometer data.
Objective: This study aimed to investigate the hypothesized negative association between duration of work time spent at a high relative aerobic workload and leisure time movement behaviours among blue-collar workers. Methods: This was a cross-sectional study based on heart rate and accelerometer data from 803 blue-collar workers (447 men and 356 women). Relative aerobic workload […]
Related Product: Actiheart
Publication Date: June 6, 2019
Who benefits most? Towards accurate prediction of electroconvulsive therapy outcome
Please consult pdf.
Related Product: MotionWatch
Publication Date: June 1, 2019
The Role of Exercise and Age on Vitamin D Metabolism
Please consult pdf.
Related Product: MotionWatch
Publication Date: June 1, 2019
Everyday stress components and physical activity: examining reactivity, recovery and pileup
The experience of naturally-occurring stress in daily life has been linked with lower physical activity levels. However, most of this evidence comes from general and static reports of stress. Less is known how different temporal components of everyday stress interfere with physical activity. In a coordinated secondary analysis of data from two studies of adults, […]
Related Product: Actiheart
Publication Date: May 28, 2019
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