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 1410 Results

Is implementing a post-lunch nap beneficial on evening performance, following two nights partial sleep restriction?

We have investigated the effects that partial-sleep-restriction (PSR0, 4-h sleep retiring at 02:30 and waking at 06:30 h for two consecutive nights) have on 07:30 and 17:00 h cognitive and submaximal weightlifting; and whether this performance improves at 17:00 h following a 13:00 h powernap (0, 30 or 60-min). Fifteen resistance-trained males participated in this study. Prior to the […]

Related Product: MotionWatch

Publication Date: October 9, 2023


Deep representation learning identifies associations between physical activity and sleep patterns during pregnancy and prematurity

Preterm birth (PTB) is the leading cause of infant mortality globally. Research has focused on developing predictive models for PTB without prioritizing cost-effective interventions. Physical activity and sleep present unique opportunities for interventions in low- and middle-income populations (LMICs). However, objective measurement of physical activity and sleep remains challenging and self-reported metrics suffer from low-resolution […]

Related Product: MotionWatch

Publication Date: September 28, 2023


Night‐to‐night variability in sleep and amyloid beta burden in normal aging

INTRODUCTION Alzheimer’s disease is associated with sleep disturbances and accumulation of cerebral amyloid beta. The objective was to examine whether actigraphy-detected sleep parameters might be biomarkers for early amyloid burden. METHODS Participants underwent a week of actigraphy and an amyloid positron emission tomography (PET) scan. Sleep duration and continuity disruption (sleep fragmentation and nocturnal awakenings) […]

Related Product: MotionWatch

Publication Date: September 21, 2023


Gender, Pain, and Function Associated With Physical Activity After Hospitalization in Persons Living With Dementia

Background: The purpose of this study was to identify factors that are associated with physical activity after hospitalization in persons living with dementia. Methods: Multiple linear regressions were conducted to test factors associated with objective activity levels (sedentary, low, moderate, and vigorous) among 244 patients living with dementia from a randomized controlled trial. Results: Within […]

Related Product: MotionWatch

Publication Date: September 20, 2023


The Impact of Multisession Sleep-Hygiene Strategies on Sleep Parameters in Elite Swimmers

Purpose: Short sleep duration and poor sleep quality are common in swimmers. Sleep-hygiene strategies demonstrated beneficial effects on several sleep parameters. The present study assessed the impact of a multisession sleep-hygiene training course on sleep in elite swimmers. Methods: Twenty-eight elite swimmers (17 [2] y) participated. The sleep-hygiene strategy consisted of 3 interventions. Sleep was […]

Related Product: MotionWatch

Publication Date: September 14, 2023


Nocturnality and activity budgets of owl monkeys in tropical ecosystems

The subtropical populations of owl monkeys (Aotus) and some lemurs have flexible patterns that include activity during both day and night. Early studies on the activity patterns of tropical owl monkeys in seminatural conditions evidenced their nocturnal behavior and a strong influence of moonlight on their activity. In this chapter, we review previous and ongoing […]

Related Product: Actiwatch Mini

Publication Date: September 14, 2023


Dynamic personalized human body energy expenditure: Prediction using time series forecasting LSTM models

Dynamic human energy expenditure (EE) consists of energy costs for resting metabolism, food digestion, physical activity, and thermoregulation. Currently, multiple models predict EE mainly concerning physical activity, thus, discarding other factors contributing to the dynamic variation of EE. This paper aimed to demonstrate that (i) a dynamic human body EE prediction requires the time series […]

Related Product: Actiheart

Publication Date: September 7, 2023


Hormone physiology and sleep dynamics among BaYaka foragers of the Congo Basin: Gendered associations between nighttime activity, testosterone, and cortisol

Sleep quality is an important contributor to health disparities and affects the physiological function of the immune and endocrine systems, shaping how resources are allocated to life history demands. Past work in industrial and post-industrial societies has shown that lower total sleep time (TST) or more disrupted nighttime sleep are linked to flatter diurnal slopes […]

Related Product: MotionWatch

Publication Date: September 6, 2023


Bipolar disorder during pregnancy and the postpartum period:: Patients considerations, course of bipolar disorder and impact of sleep loss

The aim of this thesis was to study the course of bipolar disorder (BD) in pregnant women and the influence of sleep during pregnancy and the peripartum period on the development of postpartum mood symptoms. Importantly, we also wanted to explore considerations of women with BD about family planning and pregnancy. Main findings What are […]

Related Product: MotionWatch

Publication Date: September 1, 2023


A self-paced walk test for individual calibration of heart rate to energy expenditure

Introduction Estimating free-living physical activity (PA) with continuous heart rate (HR) monitoring is challenging due to individual variation in the relationship between HR and energy expenditure. This variation can be captured through individual calibration with graded exercise tests, but structured tests with prescribed load requires medical screening and are not always feasible in population settings. […]

Related Product: Actiheart

Publication Date: September 1, 2023


Adaptive Training on Basic AR Interactions: Bi-Variate Metrics and Neuroergonomic Evaluation Paradigms

Augmented Reality (AR) training is a cost-effective and safe alternative to traditional instructional methods. However, training novices in basic mid-air AR interactions remains challenging. To address this, we aimed to: (a) develop a robust metric to evaluate user performance across different AR interaction techniques and develop adaptation models to predict additional training requirements; (b) evaluate […]

Related Product: Actiheart

Publication Date: September 1, 2023


Patients with cluster headache show signs of insomnia and sleep related stress: results from an actigraphy and self-assessed sleep study

Background Cluster headache (CH) is a primary headache disorder which is characterized by circadian timing of headache attacks, usually at nighttime, in around two thirds of patients. Patients with CH often report sleep difficulties, though it is unknown whether this is a cause or a consequence of nightly headache attacks. Objective In this case-control study […]

Related Product: MotionWatch

Publication Date: August 18, 2023


Testing an Intervention to Improve Post-hospital Outcomes in Persons Living with Dementia and Their Family Care Partners

Background and Objective Hospitalized persons living with dementia are at risk for functional decline, behavioral symptoms of distress, and delirium, all persisting in the post-acute period. In turn, family care partners (FCPs) experience increased anxiety and lack of preparedness for caregiving, compounding existing strain and burden. Family-centered Function-focused Care (Fam-FFC) purposefully engages FCPs in assessment, […]

Related Product: MotionWatch

Publication Date: August 16, 2023


Multiphase Spinal Cord Stimulation in Participants With Chronic Back or Leg Pain: Results of the BENEFIT-02 Randomized Clinical Trial

Objective This study aimed to assess the safety and effectiveness of a new charge-distributed multiphase stimulation paradigm during an extended spinal cord stimulation (SCS) trial. Materials and Methods This prospective, multicenter, randomized, single-blind, feasibility study included participants with chronic low back and/or leg pain and baseline numerical rating scale (NRS) for overall pain intensity ≥6. […]

Related Product: MotionWatch

Publication Date: August 16, 2023


Napping and circadian sleep-wake regulation during healthy aging

Study objectives Daytime napping is frequently reported among the older population and has attracted increasing attention due to its association with multiple health conditions. Here, we tested whether napping in the aged is associated with altered circadian regulation of sleep, sleepiness and vigilance performance. Methods Sixty healthy older individuals (mean age: 69y., 39 women) were […]

Related Product: MotionWatch

Publication Date: August 14, 2023


Activity behaviors before and during pregnancy are associated with women’s device-measured physical activity and sedentary time in later parenthood: a longitudinal cohort analysis

Purpose: To explore how activity behaviors before/during pregnancy relate to those in later parenthood, we assessed associations between sitting and moderate-/strenuous exercise before/during pregnancy, and sedentary time (SED) and moderate to vigorous physical activity (MVPA) 4–7 years postpartum (“later parenthood”). Methods: Longitudinal data were from the Southampton Women’s Survey, United Kingdom. Women reported time spent […]

Related Product: Actiheart

Publication Date: August 12, 2023


Post-exercise dietary macronutrient composition modulates components of energy balance in young, physically active adults

Abstract The effectiveness of exercise to reduce body mass is typically modest, partially due to energy compensation responses which may be linked to energy substrate availability around exercise. The present study aimed to investigate the effect of manipulating post-exercise energy substrate availability (high carbohydrate/low fat [HCLF] or low carbohydrate/high fat [LCHF] energy replacement) on energy […]

Related Product: Actiheart

Publication Date: August 10, 2023


Clinical and cost-effectiveness of nurse-delivered sleep restriction therapy for insomnia in primary care (HABIT): a pragmatic, superiority, open-label, randomised controlled trial

Background Insomnia is prevalent and distressing but access to the first-line treatment, cognitive behavioural therapy (CBT), is extremely limited. We aimed to assess the clinical and cost-effectiveness of sleep restriction therapy, a key component of CBT, which has the potential to be widely implemented. Methods We did a pragmatic, superiority, open-label, randomised controlled trial of […]

Related Product: MotionWatch

Publication Date: August 10, 2023


Effects of 2‐year dietary and physical activity intervention on cognition in children—a nonrandomized controlled trial

Background and Objective We investigated the effects of a combined dietary and PA intervention on cognition in children and whether changes in diet quality, PA, sedentary behavior (SB), and sedentary time (ST) are associated with changes in cognition. Methods We conducted a 2-year nonrandomized controlled trial in 504 children aged 6–9 years at baseline. The children […]

Related Product: Actiheart

Publication Date: August 9, 2023


Mechanisms and consequences of weight gain after deep brain stimulation of the subthalamic nucleus in patients with Parkinson’s disease

Body weight gain in combination with metabolic alterations has been observed after deep brain stimulation (DBS) of subthalamic nucleus (STN) in patients with Parkinson’s disease (PD), which potentially counteracts the positive effects of motor improvement. We aimed to identify stimulation-dependent effects on motor activities, body weight, body composition, energy metabolism, and metabolic blood parameters and […]

Related Product: MotionWatch

Publication Date: August 8, 2023


Soccer, Sleep, Repeat: Effects of Training Characteristics on Sleep Quantity and Sleep Architecture

Due to the high demands of competitive sports, the sleep architecture of adolescent athletes may be influenced by their regular training. To date, there is no clear evidence on how training characteristics (intensity, time of day, number of sessions) influence sleep quality and quantity. 53 male soccer players (M = 14.36 years, SD = 0.55) […]

Related Product: MotionWatch

Publication Date: August 2, 2023


Educational Concerns About the Safety of Cataract Surgery During Residency: The E3CAPS Pedagogic Study

Cataract surgery is the most common surgical procedure performed in France. While the incidence of intraoperative complications affecting visual prognosis is extremely low, given the large number of patients operated on, the absolute number of patients affected by complications is quite high. Complication rates are significantly higher when ophthalmology residents (ORs) perform the surgery. Although […]

Related Product: MotionWatch

Publication Date: August 2, 2023


UDAMA: Unsupervised Domain Adaptation through Multi-discriminator Adversarial Training with Noisy Labels Improves Cardio-fitness Prediction

Deep learning models have shown great promise in various healthcare monitoring applications. However, most healthcare datasets with high-quality (gold-standard) labels are small-scale, as directly collecting ground truth is often costly and time-consuming. As a result, models developed and validated on small-scale datasets often suffer from overfitting and do not generalize well to unseen scenarios. At […]

Related Product: Actiheart

Publication Date: July 31, 2023


Neurophysiological, muscular, and perceptual adaptations of exoskeleton use over days during overhead work with competing cognitive demands

This study captured neurophysiological, muscular, and perceptual adaptations to shoulder exoskeleton use during overhead work with competing physical-cognitive demands. Twenty-four males and females, randomly divided into control and exoskeleton groups, performed an overhead reaching and pointing task over three days without (single task) and with (dual task) a working memory task. Task performance, electromyography (EMG), […]

Related Product: Actiheart

Publication Date: July 26, 2023


Sleep–wake monitoring of people with intellectual disability: Examining the agreement of EMFIT QS and actigraphy

Background Gaining insight into sleep–wake patterns of persons with intellectual disabilities is commonly done using wrist actigraphy. For some people, contactless alternatives are needed. This study compares a contactless bed sensor with wrist actigraphy to monitor sleep–wake patterns of people with moderate to profound intellectual disabilities. Method Data were collected with EMFIT QS (activity and […]

Related Product: MotionWatch

Publication Date: July 25, 2023


The efficacy of weighted blankets for sleep in children with attention‐deficit/hyperactivity disorder—A randomized controlled crossover trial

Weighted blankets are a non-pharmacological intervention for treating sleep and anxiety problems in children with attention-deficit/hyperactivity disorder. However, research on the efficacy of weighted blankets is sparse. The aim of this randomized controlled trial with a crossover design (4 + 4 weeks) was to evaluate the efficacy of weighted blankets on sleep among children with attention-deficit/hyperactivity disorder and […]

Related Product: MotionWatch

Publication Date: July 15, 2023


User experiences of pre-sleep sensory alpha brainwave entrainment for people with chronic pain and sleep disturbance

Aim: To explore the user experiences of pre-sleep alpha entrainment via a smartphone-enabled audio or visual stimulation program for people with chronic pain and sleep disturbance. Materials & methods: Semi-structured interviews were held with 27 participants completing a feasibility study of pre-sleep entrainment use for 4 weeks. Transcriptions were subject to template analysis. Results: Five […]

Related Product: MotionWatch

Publication Date: July 9, 2023


Concordance of objective and subjective measures of sleep in children with neurodevelopmental conditions: A systematic review and meta-analysis

The purpose of this systematic review and meta-analysis is to delineate the concordance of objective and subjective measures of sleep in children with neurodevelopmental conditions (NDCs). A systematic literature search identified 31 studies that compare objective and subjective estimates of sleep parameters in autism, ADHD or rare genetic syndromes associated with intellectual disability. The meta-analyses […]

Related Product: MotionWatch

Publication Date: July 7, 2023


Effects of Different Exercise Programs on Symptoms, Sleep, and Quality of Life in Patients with Primary Restless Legs Syndrome

Background Restless legs syndrome (RLS) is a sensorimotor disorder that can have a significant detrimental impact on the quality of life and sleep. Objectives Our aim was to examine the effects of aerobic exercise and stretching exercise programs on symptom severity, sleep, and quality of life in patients with primary RLS. Methods A total of […]

Related Product: MotionWatch

Publication Date: July 4, 2023


Physical activity, daytime activity and sleep during a spa stay

INTRODUCTION: Recently, the Spa stay, including facilities (e.g., swimming pools and gyms), and treatments, have been described as incrementing physical activity (PA), sleep quality, and, more generally, the quality of life [1, 2]. To date, no studies have investigated these aspects in sub-healthy subjects visiting Italian Spa; thus, the current study aims to shed light […]

Related Product: MotionWatch

Publication Date: July 1, 2023


Low Doses of Melatonin to Improve Sleep in Children with ADHD: An Open-Label Trial

Objective. Only a few studies assessing the sleep effects of low doses of melatonin (aMT) have been performed in the past, most of them in adults, and only one in subjects with attention-deficit/hyperactivity disorder (ADHD). The aim of this study was to provide evidence of the changes induced by aMT doses as low as 1 […]

Related Product: MotionWatch

Publication Date: June 28, 2023


Induction of Anxiety-Like Phenotypes by Knockdown of Cannabinoid Type-1 Receptors in the Amygdala of Marmosets

The amygdala is an important hub for regulating emotions and is involved in the pathophysiology of many mental diseases, such as depression and anxiety. Meanwhile, the endocannabinoid system plays a crucial role in regulating emotions and mainly functions through the cannabinoid type-1 receptor (CB1R), which is strongly expressed in the amygdala of non-human primates (NHPs). […]

Related Product: Actiwatch Mini

Publication Date: June 27, 2023


NUCB2/nesfatin-1 in the acute stress response of obese women with high and low anxiety

NUCB2/nesfatin-1 is an anorexigenic peptide hormone first known for its effects on energy homeostasis. More recently, a growing evidence suggests a role of NUCB2/nesfatin-1 in emotion regulation, particularly in the modulation of anxiety, depression and emotional stress response. Since stress-related mood disorders are often comorbid with obesity, we investigated the effect of acute psychosocial stress […]

Related Product: Actiheart

Publication Date: June 27, 2023


Accumulating Sedentary Time and Physical Activity from Childhood to Adolescence and Cardiac Function in Adolescence

Background Little is known about the associations of a sedentary lifestyle from childhood with cardiac work and function during adolescence. We studied if cumulative sedentary time and physical activity from childhood to adolescence are associated with cardiac work and function in adolescence. Methods A total of 153 adolescents aged 15 years at the time of […]

Related Product: Actiheart

Publication Date: June 23, 2023


Conditioning of the Cortisol Awakening Response in Healthy Men: Study Protocol for a Randomized Controlled Trial

Background: The hormone cortisol plays important roles in human circadian and stress physiology and is an interesting target for interventions. Cortisol varies not only in response to stress but also as part of a diurnal rhythm. It shows a particularly sharp increase immediately after awakening, the cortisol awakening response (CAR). Cortisol can be affected by […]

Related Product: MotionWatch

Publication Date: June 19, 2023


Sleep Location and Its Association with Caregiver Sleep Quality During Patient Hospital Admission

During acute hospitalization, many caregivers decide to stay at the care recipient’s bedside over the course of several days or months, coping with a stressful situation and a poor sleeping environment. Our objective was to characterize caregiver sleep–wake cycles during care recipient hospital admission and test the association between sleep location (home versus hospital) and […]

Related Product: MotionWatch

Publication Date: June 16, 2023


Examining the Associations of Early Childhood Teacher’s Emotional Well-being with Physiologic Stress, Mindfulness and Self-Compassion

Background Recent national reports indicate that early childhood (EC) teachers experience exceptionally high levels of chronic stress which can lead to adverse health outcomes. In this presentation, we share preliminary evidence of a mindfulness-based intervention, Cultivating Healthy Intentional Mindful Educators (CHIME) to support EC teachers’ regulatory processes. We hypothesize EC teachers’ social-emotional health is related […]

Related Product: Actiheart

Publication Date: June 15, 2023


Resistance to thyroid hormone induced tachycardia in RTHα syndrome

Mutations in thyroid hormone receptor α1 (TRα1) cause Resistance to Thyroid Hormone α (RTHα), a disorder characterized by hypothyroidism in TRα1-expressing tissues including the heart. Surprisingly, we report that treatment of RTHα patients with thyroxine to overcome tissue hormone resistance does not elevate their heart rate. Cardiac telemetry in male, TRα1 mutant, mice indicates that […]

Related Product: Actiheart

Publication Date: June 7, 2023


Can air purification improve sleep quality? A 2‐week randomised‐controlled crossover pilot study in healthy adults

Insufficient quantity and quality of sleep is a public health concern that can be addressed by interventions for improving sleep outcomes. Environmental factors such as poor air quality are a potential target for intervention, particularly in light of associations between air pollution and worse sleep. The aim of this pilot study was to investigate the […]

Related Product: MotionWatch

Publication Date: June 1, 2023


Physiological and behavioural effects of intermittent fasting vs daily caloric restriction in meat-type poultry

Intermittent fasting (IF) is the practice of temporal food restriction to promote metabolic switching between a glucose- and a ketone-based metabolism, which has been reported to come with diverse health benefits. IF practices appear to confer many of the advantages of caloric restriction without restricting total energy intake, and studies in both rodents and humans […]

Related Product: MotionWatch

Publication Date: May 30, 2023


Squash Versus Actiheart-Measured Physical Activity In The Middle-Aged General Population: The Neo Study

Background Adequate physical activity levels have been associated with wide-ranging beneficial health outcomes. It is therefore important to adequately measure physical activity. This is often done by the SQUASH (Short Questionnaire to Assess Health-enhancing physical activity), a patient-assessed instrument. However, this is a subjective method of which data on validity in large, middle-aged population groups […]

Related Product: Actiheart

Publication Date: May 30, 2023


Brain responses to food viewing in women during pregnancy and post partum and their relationship with metabolic health: study protocol for the FOODY Brain Study, a prospective observational study

Introduction Food cravings are common in pregnancy and along with emotional eating and eating in the absence of hunger, they are associated with excessive weight gain and adverse effects on metabolic health including gestational diabetes mellitus (GDM). Women with GDM also show poorer mental health, which further can contribute to dysregulated eating behaviour. Food cravings […]

Related Product: Actiheart

Publication Date: May 18, 2023


Demonstrating the applicability of using GPS and interview data to understand changes in use of space in response to new transport infrastructure: the case of the Cambridgeshire Guided Busway, UK

Introduction Changes to the built environment can contribute to behavioural changes at the population level, including increases in physical activity. Evidence for how such interventions affect behaviour through qualitative understanding complements quantitative evidence of effectiveness of interventions, and may help to strengthen the basis for causal inference. We demonstrate the use of objective data to […]

Related Product: Actiheart

Publication Date: May 17, 2023


Towards a Distinct Sleep and Behavioural Profile of Fetal Alcohol Spectrum Disorder (FASD): A Comparison between FASD, Autism and Typically Developing Children

BACKGROUND: The term Fetal Alcohol Spectrum Disorders (FASD) describes a range of neurodevelopmental conditions, the direct result of prenatal alcohol exposure. FASD encompasses a range of behavioural, cognitive and sleep patterns that are sometimes indiscernible from other neurodevelopmental conditions, one in particular being Autism Spectrum Disorders (ASD). This study aimed to provide a comparison of […]

Related Product: MotionWatch

Publication Date: May 16, 2023


The Suprachiasmatic Nucleus of The Reindeer (Rangifer tarandus tarandus) and it’s Circadian Outputs

The Earth is in constant movement around the Sun – this has created environments with changing light throughout the day and year. Through evolution animals have adapted to this change in light and circadian and circannual rhythms have evolved to enhance fitness and survival. Animals living in the Arctic region have a different relationship to […]

Related Product: MotionWatch

Publication Date: May 14, 2023


Sleep IntervEntion as Symptom Treatment for ADHD (SIESTA)-Blended CBT sleep intervention to improve sleep, ADHD symptoms and related problems in adolescents with ADHD: Protocol for a randomised controlled trial

Introduction Adolescents with attention deficit hyperactivity disorder (ADHD) experience a more disrupted sleep and more sleep problems compared with typically developing adolescents. This is particularly concerning, because disrupted sleep is related to worsened clinical, neurocognitive and functional outcomes and leads to increased ADHD symptom impairment. Due to the specific difficulties adolescents with ADHD experience, a […]

Related Product: MotionWatch

Publication Date: May 13, 2023


Resting heart rate is a population-level biomarker of cardiorespiratory fitness: The Fenland Study

Introduction Few large studies have evaluated the relationship between resting heart rate (RHR) and cardiorespiratory fitness. Here we examine cross-sectional and longitudinal relationships between RHR and fitness, explore factors that influence these relationships, and demonstrate the utility of RHR for remote population monitoring. Methods In cross-sectional analyses (The UK Fenland Study: 5,722 women, 5,143 men, […]

Related Product: Actiheart

Publication Date: May 11, 2023


Sleep Reactivity and Related Factors in Adolescence: An Increased Risk for Insomnia? A Longitudinal Assessment

Purpose The individual vulnerability for stress-related sleep difficulties (eg, sleep reactivity) is known as a predisposing factor of insomnia in adults, yet relatively little is known about sleep reactivity in adolescence. The study goal is to determine factors related to sleep reactivity and to investigate whether sleep reactivity and related factors predict current and new […]

Related Product: MotionWatch

Publication Date: May 10, 2023


Are infrared thermography, feeding behavior, and heart rate variability measures capable of characterizing group-housed sow social hierarchies?

Group gestation housing is quickly becoming standard practice in commercial swine production. However, poor performance and welfare in group housed sows may result from the formation and maintenance of the social hierarchy within the pen. In the future, the ability to quickly characterize the social hierarchy via precision technologies could be beneficial to producers for […]

Related Product: Actiheart

Publication Date: May 9, 2023


Does workplace telepressure get under the skin? Protocol for an ambulatory assessment study on wellbeing and health-related physiological, experiential, and behavioral concomitants of workplace telepressure

Background The daily working life of many employees requires the use of modern information and communication technology (ICT) devices such as computers, tablets, and smartphones. The double-edged nature of digital work environments has been increasingly highlighted. Benefits such as increased flexibility come at a personal cost. One of the potential downsides is workplace telepressure, i.e., […]

Related Product: MotionWatch

Publication Date: May 3, 2023


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CamNtech Ltd.
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PE28 9JD, UK

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