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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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
Sleep extension and metabolic health in male overweight/obese short sleepers: A randomised controlled trial
While limited evidence suggests that longer sleep durations can improve metabolic health in habitual short sleepers, there is no consensus on how sustained sleep extension can be achieved. A total of 18 men (mean [SD] age 41 [ 9] years), who were overweight/obese (mean [SD] body mass index 30 [3] kg/m2) and short sleepers at […]
Related Product: MotionWatch
Publication Date: August 20, 2021
Are we still in the dark? A systematic review on personal daily light exposure, sleep-wake rhythm, and mood in healthy adults from the general population
Insufficient light exposure is assumed to be related to a wide array of health problems, though few studies focus on the role of whole-day light exposure in the habitual setting in the development of these health problems. The current review aims to describe the association between personal light exposure in the habitual setting and sleep-wake […]
Related Product: MotionWatch
Publication Date: August 19, 2021
Subjective and objective sleep in young people with borderline personality disorder features
Characterising sleep in young people (aged 15–25 years) with borderline personality disorder (BPD) features is crucial given the association between BPD features and sleep disturbance, negative consequences of poor sleep, and normative developmental sleep changes that occur in this age group. The present study aimed to characterise the sleep profile of young people with BPD […]
Related Product: MotionWatch
Publication Date: August 19, 2021
Intravesical Bacillus Calmette-Guerin treatment-induced sleep quality deterioration in patients with non-muscle invasive bladder cancer: functional outcome assessment based on a questionnaire survey and actigraphy
Purpose We investigated sleep parameters and patient-reported outcomes before, during, and after induction Bacillus Calmette-Guerin therapy using questionnaires and actigraphy in patients with non-muscle invasive bladder cancer. Methods We investigated 10 patients who received Bacillus Calmette-Guerin therapy once weekly for 8 weeks. The International Prostate Symptom Score, European Organization for Research and Treatment of Cancer […]
Related Product: MotionWatch
Publication Date: August 16, 2021
Gender differences in BaYaka forager sleep-wake patterns in forest and village contexts
Sleep studies in small-scale subsistence societies have broadened our understanding of cross-cultural sleep patterns, revealing the flexibility of human sleep. We examined sleep biology among BaYaka foragers from the Republic of Congo who move between environmentally similar but socio-ecologically distinct locations to access seasonal resources. We analyzed the sleep–wake patterns of 51 individuals as they […]
Related Product: MotionWatch
Publication Date: July 1, 2021
Self-Reported and Objective Sleep Measures in Stroke Survivors With Incomplete Motor Recovery at the Chronic Stage
Background. Stroke survivors commonly complain of difficulty sleeping. Poor sleep is associated with reduced quality of life and more understanding of long-term consequences of stroke on sleep is needed. Objective. The primary aims were to (1) compare sleep measures between chronic stroke survivors and healthy controls and (2) test for a relationship between motor impairment, […]
Related Product: MotionWatch
Publication Date: July 1, 2021
Emotion Regulation Failures Are Preceded by Local Increases in Sleep-like Activity
Emotion self-regulation relies both on cognitive and behavioral strategies implemented to modulate the subjective experience and/or the behavioral expression of a given emotion. Although it is known that a network encompassing fronto-cingulate and parietal brain areas is engaged during successful emotion regulation, the functional mechanisms underlying failures in emotion suppression (ES) are still unclear. In […]
Related Product: MotionWatch
Publication Date: June 22, 2021
Circadian rhythm and quality of life in older adults
Sleep is critical to physical and mental health for people of all ages, but older adults are particularly vulnerable to the consequences of poor sleep health. The purpose of this pilot study was to explore patterns of sleep and the relationships between circadian rhythm disorders and quantity of life in 34 community-dwelling older adults. Participants […]
Related Product: MotionWatch
Publication Date: June 17, 2021
Validity and reliability of the Suggested Immobilization Test for measurement of restless legs syndrome severity in adults with multiple sclerosis
Objective/Background Adults with multiple sclerosis (MS) often present with conditions that mimic restless legs syndrome (RLS), thereby adding complexity into the assessment of RLS severity. The current gold-standard measures of RLS severity rely on a fixed seven-day time frame, which limits the ability of these measures for studying acute changes in RLS severity. The present […]
Related Product: MotionWatch
Publication Date: June 16, 2021
Individual differences in the temporal relationship between sleep and agitation: a single-subject study in nursing home residents with dementia experiencing sleep disturbance and agitation
Objectives Previous studies on the interrelationship between sleep and agitation relied on group-aggregates and so results may not be applicable to individuals. This proof-of-concept study presents the single-subject study design with time series analysis as a method to evaluate the association between sleep and agitation in individual nursing home residents using actigraphy. Method To record […]
Related Product: MotionWatch
Publication Date: June 15, 2021
Pre-sleep cognitive arousal exacerbates sleep disturbance in chronic pain: an exploratory daily diary and actigraphy study
Objectives Insomnia is commonly comorbid with chronic pain, and typically leads to worse outcomes. Two factors that could contribute to a cycle of pain and sleeplessness are pre-sleep cognitive arousal (repetitive thought processes) and low mood. This study aimed to examine how pain, sleep disturbance, mood, and pre-sleep cognitive arousal inter-relate, to determine whether low […]
Related Product: MotionWatch
Publication Date: June 14, 2021
Time-of-day effects on objective and subjective short-term memory task performance
The time-of-day along with the synchrony effect (better performance at optimal times of the day according to the chronotype) on the cognitive performance has been well established in previous research. This influence is mediated by both circadian and homeostatic processes consistent with the Borbély two-process model. This experiment focused on the objective and subjective performance […]
Related Product: MotionWatch
Publication Date: June 14, 2021
Efficacy of early warning signals and spectral periodicity for predicting transitions in bipolar patients: An actigraphy study
Early-warning signals (EWS) have been successfully employed to predict transitions in research fields such as biology, ecology, and psychiatry. The predictive properties of EWS might aid in foreseeing transitions in mood episodes (i.e. recurrent episodes of mania and depression) in bipolar disorder (BD) patients. We analyzed actigraphy data assessed during normal daily life to investigate […]
Related Product: MotionWatch
Publication Date: June 7, 2021
The CHD8/CHD7/Kismet family links blood-brain barrier glia and serotonin to ASD-associated sleep defects
Sleep disturbances in autism and neurodevelopmental disorders are common and adversely affect patient’s quality of life, yet the underlying mechanisms are understudied. We found that individuals with mutations in CHD8, among the highest-confidence autism risk genes, or CHD7 suffer from disturbed sleep maintenance. These defects are recapitulated in Drosophila mutants affecting kismet, the sole CHD8/CHD7 […]
Related Product: MotionWatch
Publication Date: June 4, 2021
Sleepiness is a signal to go to bed: data and model simulations
Study Objectives Assess the validity of a subjective measure of sleepiness as an indicator of sleep drive by quantifying associations between intraindividual variation in evening sleepiness and bedtime, sleep duration, and next morning and subsequent evening sleepiness, in young adults. Methods Sleep timing and sleepiness were assessed in 19 students in late autumn and late […]
Related Product: MotionWatch
Publication Date: May 15, 2021
MotionWatch 8 Wrist Actimetry Data Analysis: from ambulatory recording to real life monitoring
On the National Sleep Research Resource (NSRR) platform, there’s a year’s worth in real-life wrist actigraphy data using a Motionwatch8. The data analysis suggested in this paper reveals a data structure that allows the design of parameters to be used in real life monitoring and may drive the developments of devices. The analysis is totally […]
Related Product: MotionWatch
Publication Date: May 13, 2021
Effects of Saffron Extract on Sleep Quality: A Randomized Double-Blind Controlled Clinical Trial
A saffron extract has been found to be effective in the context of depression and anxiety, but its effect on sleep quality has not been investigating yet using objective approaches. For this purpose, a randomized double-blind controlled study was conducted in subjects presenting mild to moderate sleep disorder associated with anxiety. Sixty-six subjects were randomized […]
Related Product: MotionWatch
Publication Date: April 27, 2021
Protocol for Light-Dark and Activity Rhythm Therapy for sleep: Feasibility and acceptability in Schizophrenia spectrum disorders (L-DART FitSz)
Sleep problems are common in people with diagnoses of schizophrenia spectrum disorders (> 50%), even during periods of relative stability of psychotic symptoms. Evidence suggests that people living with schizophrenia spectrum disorders are often keen to improve their sleep, but few non-pharmacological sleep treatments are available to patients in specialist mental health services. It has been […]
Related Product: MotionWatch
Publication Date: April 19, 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
Different Circadian Rest-Active Rhythms in Kleine-Levin Syndrome: A prospective and case-control study
Study objectives Kleine-Levin-syndrome (KLS) is a rare recurrent hypersomnia. Our study aimed at monitoring the movements of patients with KLS using actigraphy and evaluating their circadian rhythm. Methods Twenty young patients with KLS and 14 age-matched controls were recruited. Each individual wore an actigraphy for more than 6 months to monitor at least two attacks. […]
Related Product: MotionWatch
Publication Date: April 14, 2021
Association of Sleep Quality With Greater Left Ventricular Mass in Children Aged 9 to 11 Years
Objective Research has consistently found associations between sleep characteristics and cardiovascular disease risk in children, adolescents, and adults. Although primarily investigated in clinical samples (e.g., in those with sleep disorders), greater left ventricular mass is associated with poor sleep quality in nonclinical adult populations as well; however, this has not been evaluated in children or […]
Related Product: MotionWatch
Publication Date: April 1, 2021
Sleep deprivation therapy to reset the circadian pacemaker in a non-24-hour sleep-wake disorder: a case report
Non-24-hour sleep-wake disorder (N24SWD) is one of several chronic circadian rhythm sleep-wake disorders (CRSWDs). It is defined as progressive daily shifts in sleep onset and wake times. It mainly affects sight-impaired persons, is relatively rare in sighted patients, and is difficult to treat, with no guidelines. We report a case of N24SWD in a sighted […]
Related Product: MotionWatch
Publication Date: April 1, 2021
Effect of the depth of cold water immersion on sleep architecture and recovery among well-trained male endurance runners.
Introduction: The aim of the present study was to investigate the effect of the depth of cold water immersion (CWI) (whole-body with head immersed and partial-body CWI) after high-intensity, intermittent running exercise on sleep architecture and recovery kinetics among well-trained runners. Methods: In a randomized, counterbalanced order, 12 well-trained male endurance runners (V.O2max = 66.0 […]
Related Product: MotionWatch
Publication Date: March 31, 2021
Brain reactivity to humorous films is affected by insomnia
Study objectives Emotional reactivity to negative stimuli has been investigated in insomnia, but little is known about emotional reactivity to positive stimuli and its neural representation. Methods We used 3T fMRI to determine neural reactivity during the presentation of standardized short, 10-40-s, humorous films in insomnia patients (n=20, 18 females, aged 27.7 +/- 8.6 years) […]
Related Product: MotionWatch
Publication Date: March 27, 2021
Lights Out: Examining Sleep in Children with Vision Impairment
Sleep is crucial for development across cognitive, physical, and social-emotional domains. Sleep quality and quantity impact domains of daytime functioning, attainment, and global development. Previous work has explored sleep profiles in typically developing children and children with developmental disorders such as Down syndrome and Williams Syndrome, yet there is a complete absence of published work […]
Related Product: MotionWatch
Publication Date: March 26, 2021
Efficacy of triprolidine in the treatment of temporary sleep disturbance
Triprolidine, a first-generation antihistamine for allergic rhinitis, has a shorter half-life and fewer persistent effects relative to other antihistamines and may be useful in the treatment of temporary sleep disturbance. Patients aged ≥18 years old were randomized 1:1:1 to receive either triprolidine 2.5 mg (n = 65), triprolidine 5 mg (n = 66), or placebo […]
Related Product: MotionWatch
Publication Date: March 25, 2021
Effect of COVID-19 home confinement on sleep monitorization and cardiac autonomic function in people with multiple sclerosis: A prospective cohort study
Background Low sleep quality, cardiac autonomic dysfunction and poor quality of life are some of the most prevalent symptoms in people with Multiple Sclerosis (MS). In addition to the progression of the disease, these symptoms are aggravated by physical inactivity. Therefore, home confinement due to COVID-19 pandemic restrictions could further worsen these symptoms. This study […]
Related Product: MotionWatch
Publication Date: March 19, 2021
Reshaping the path of vascular cognitive impairment with resistance training: a study protocol for a randomized controlled trial
Background Subcortical ischemic vascular cognitive impairment (SIVCI) is the most common form of vascular cognitive impairment. Importantly, SIVCI is considered the most treatable form of cognitive impairment in older adults, due to its modifiable risk factors such as hypertension, diabetes mellitus, and hypercholesterolemia. Exercise training is a promising intervention to delay the progression of SIVCI, […]
Related Product: MotionWatch
Publication Date: March 18, 2021
Quantifying Circadian Aspects of Mobility-Related Behavior in Older Adults by Body-Worn Sensors—An “Active Period Analysis”
Disruptions of circadian motor behavior cause a significant burden for older adults as well as their caregivers and often lead to institutionalization. This cross-sectional study investigates the association between mobility-related behavior and subjectively rated circadian chronotypes in healthy older adults. The physical activity of 81 community-dwelling older adults was measured over seven consecutive days and […]
Related Product: MotionWatch
Publication Date: March 18, 2021
Sex Differences in Rest-Activity Circadian Rhythm in Patients With Metabolic Syndrome
Rest-Activity circadian Rhythm (RAR) can be used as a marker of the circadian timing system. Recent studies investigated the relationship between irregular circadian rhythms and cardiovascular risk factors such as hypertension, obesity, and dyslipidemia. These factors are related to the Metabolic Syndrome (MS), a clustering of metabolic risk factors that increases the risk of several […]
Related Product: MotionWatch
Publication Date: March 18, 2021
Sleep characteristics of highly trained wheelchair rugby athletes with and without a cervical spinal cord injury during the competitive season
Sleep behaviours although significantly relevant to exercise recovery are poorly characterised in Para-sport athletes. Therefore, the main aims were to describe sleep quality and quantity of highly trained wheelchair rugby (WR) athletes during the competitive season, and to investigate whether impairment type or attending a training camp influenced sleep outcomes. Eighteen male WR athletes (mean […]
Related Product: MotionWatch
Publication Date: March 17, 2021
Understanding fatigue in a naval submarine: Applying biomathematical models and workload measurement in an intensive longitudinal design
Fatigue is a critically important aspect of crew endurance in submarine operations, with continuously high fatigue being associated with increased risk of human error and long-term negative health ramifications. Submarines pose several unique challenges to fatigue mitigation, including requirements for continuous manning for long durations, a lack of access to critical environmental zeitgebers (stimuli pertinent […]
Related Product: MotionWatch
Publication Date: March 16, 2021
Alterations of the cardiovascular rhythms and sleep quality in esophageal cancer patients
In humans, there is a daily rhythm in blood pressure and is one of the known risk factors for different types of cardiovascular diseases. Sleep quality is an important clinical construct. Daytime sleepiness is common sleep related clinical problem, suggesting a serious underlying physiological anomaly. Most of the studies have been done in reference to […]
Related Product: MotionWatch
Publication Date: March 16, 2021
Temporal dynamics of depression, cognitive performance and sleep in older persons with depressive symptoms and cognitive impairments: a series of eight single-subject studies
Objectives: To investigate the presence, nature and direction of the daily temporal association between depressive symptoms, cognitive performance and sleep in older individuals. Design, setting, participants: Single-subject study design in eight older adults with cognitive impairments and depressive symptoms. Measurements: For 63 consecutive days, depressive symptoms, working memory performance and night-time sleep duration were daily […]
Related Product: MotionWatch
Publication Date: March 15, 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
Accuracy of Actigraphy Compared to Concomitant Ambulatory Polysomnography in Narcolepsy and Other Sleep Disorders
Actigraphy provides longitudinal sleep data over multiple nights. It is a less expensive and less cumbersome method for measuring sleep than polysomnography. Studies assessing accuracy of actigraphy compared to ambulatory polysomnography in different sleep-disordered patients are rare. We aimed to compare the concordance between these methods in clinical setting. We included 290 clinical measurements of […]
Related Product: MotionWatch
Publication Date: March 4, 2021
A Sleep Analysis of Elite Female Soccer Players During a Competition Week
Purpose: (1) To compare the sleep of female players from a professional soccer team to nonathlete controls across an in-season week and (2) to compare the sleep of core and fringe players from the same team on the night after a match to training nights. Methods: Using an observational design, 18 professional female soccer players […]
Related Product: MotionWatch
Publication Date: March 3, 2021
The self-reported causes of sleepiness in shift-working tram and truck drivers
Identifying the causes of sleepiness in various safety-critical work environments is necessary for implementing more efficient fatigue management strategies. In transportation, little is known about drivers’ own perceptions of these causes. Therefore, we instructed shift-working tram (n = 23) and long-haul truck drivers (n = 52) to report at the end of their shifts what […]
Related Product: MotionWatch
Publication Date: March 2, 2021
Effects of resistance training intensity on sleep quality and strength recovery in trained men: a randomized cross-over study
Resistance training (RT) variables can affect sleep quality, strength recovery and performance. The aim of this study was to examine the acute effect of RT leading to failure vs. non-failure on sleep quality (SQ), heart rate variability (HRV) overnight and one-repetition maximum (1-RM) performance 24 hours after training. Fifteen resistance-trained male athletes (age: 23.4 ± […]
Related Product: MotionWatch
Publication Date: March 1, 2021
How do the officials sleep? The assessment of sleep of the public administration workers using objective and subjective methods
Sleep impacts our functioning, both on a physical and mental level. This study aimed to assess the officials’ sleep using objective (actigraphic examination) and subjective evalutation methods (self-administered questionnaire and sleep diary). The analysis revealed that among the officials, sleep deprivation was common. The average actual sleep time in this group was 1-hour shorter than […]
Related Product: MotionWatch
Publication Date: March 1, 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
The impact of daily caffeine intake on nighttime sleep in young adult men
Acute caffeine intake can delay sleep initiation and reduce sleep intensity, particularly when consumed in the evening. However, it is not clear whether these sleep disturbances disappear when caffeine is continuously consumed during daytime, which is common for most coffee drinkers. To address this question, we investigated the sleep of twenty male young habitual caffeine […]
Related Product: MotionWatch
Publication Date: February 25, 2021
The Relationships Between Training Load, Type of Sport, and Sleep Among High-Level Adolescent Athletes
Purpose: To evaluate the effects of sporting activities, training loads, and athletes’ characteristics on sleep among high-level adolescent athletes, in a controlled training and academic environment. Methods: A total of 128 high-level adolescent athletes (age = 15.2 [2.0] y), across 9 different sports, completed common sleep questionnaires and were monitored daily (7.3 [2.7] d) during a typical […]
Related Product: MotionWatch
Publication Date: February 25, 2021
Weekly, seasonal and chronotype‐dependent variation of Dim‐Light Melatonin Onset
In humans, the most important zeitgeber for entrainment is light. Laboratory studies have shown that meaningful changes in light exposure lead to phase shifts in markers of the circadian clock. In natural settings, light is a complex signal varying with external conditions and individual behaviors; nonetheless, phase of entrainment is assumed to be fairly stable. […]
Related Product: MotionWatch
Publication Date: February 20, 2021
The Effects of Genetic Background for Diurnal Preference on Sleep Development in Early Childhood
Purpose No previous research has examined the impact of the genetic background of diurnal preference on children´s sleep. Here, we examined the effects of genetic risk score for the liability of diurnal preference on sleep development in early childhood in two population-based cohorts from Finland. Participants and Methods The primary sample (CHILD-SLEEP, CS) comprised 1420 […]
Related Product: MotionWatch
Publication Date: February 16, 2021
Periodic Leg Movements’ Diagnosis in Spinal Cord Injury: Actigraphy as an Alternative for Polysomnography?
Periodic Limb Movements during Sleep (PLMs) are episodes of repetitive, stereotypical, hallux or foot movements. They could induce sleep disturbance, fatigue, daytime sleepiness and impaired quality of life but also increased cardiovascular risk by rising heart rate and blood pressure at night. Gold standard for PLMs diagnosis is based on electromyographic recording of tibialis anterior […]
Related Product: MotionWatch
Publication Date: February 11, 2021
Temporal organisation of the brain’s intrinsic motor network: The relationship with circadian phenotype and motor performance
Background Functional connectivity (FC) of the motor network (MN) is often used to investigate how intrinsic properties of the brain are associated with motor abilities and performance. In addition, the MN is a key feature in clinical work to map the recovery after stroke and aid the understanding of neurodegenerative disorders. Time of day variation […]
Related Product: MotionWatch
Publication Date: February 9, 2021
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