Publications

CamNtech Research Library

 

CamNtech products have been trusted by specialist researchers for 25 years. Our research library contains peer reviewed publications citing the use of our devices. Filter by product, application, keyword, author or use free text search to locate your area of interest.

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Found 353 Results

Day and night changes in energy expenditure of patients on automated peritoneal dialysis

Rationale Automated peritoneal dialysis (APD) treatment for end-stage kidney disease affords patients a degree of autonomy in everyday life. Clinical investigations of their energy expenditure (EE) are usually based on resting EE, which could mask day and night variations in EE. The aim of this study, therefore, was to compare the components of EE in […]

Related Product: Actiheart

Publication Date: November 28, 2020


Cognitive dietary restraint score is associated with lower energy, carbohydrate, fat, and grain intake among female adolescent endurance runners

This cross-sectional study investigated associations between cognitive dietary restraint (CDR), energy, macronutrient and food group intake, menstrual function, and bone density in female adolescent endurance runners. Participants were forty female adolescent endurance runners. The independent variable was CDR, as assessed by the Three Factor Eating Questionnaire (TFEQ). Runners with CDR subscale scores ≥11 were classified […]

Related Product: Actiheart

Publication Date: November 25, 2020


The relationship of sleep duration and quality to energy expenditure and physical activity in children

Background Shorter sleep duration has been linked to the risk for obesity in children. The pathways linking sleep duration and quality to the risk of obesity are unclear, particularly the effect of sleep on energetics. Objective We investigated the relationship between sleep duration, quality and timing in children, to the basal metabolic rate (BMR), total […]

Related Product: Actiheart

Publication Date: November 15, 2020


Effects of Inspiratory Muscle Training on Heart Rate Variability in Children with Cystic Fibrosis: A Pilot Study

Purpose Cystic Fibrosis (CF) is a multisystem disease associated with symptoms such as dyspnoea, tachycardia and tachypnea that may be related to changes in autonomic function and sensitive to improvement following inspiratory muscle training (IMT). The aim of the present study was to investigate the effect of IMT on heart rate variability (HRV) and respiratory […]

Related Product: Actiheart

Publication Date: November 9, 2020


Physiological Data Models to Understand the Effectiveness of Drone Operation Training in Immersive Virtual Reality

Data collection using unmanned aerial vehicles (UAVs) in construction and heavy civil projects is subject to compliance with strict operational rules and safety regulations. Both the US Federal Aviation Administration (FAA) and the European Union Aviation Safety Agency (EASA) require drone operators to keep the drone in sight and avoid flying near people or other […]

Related Product: Actiheart

Publication Date: October 29, 2020


The influence of low-intensity resistance training combined with neuromuscular electrical stimulation on autonomic activity in healthy adults: A randomized controlled cross-over trial

Background: Low-intensity resistance training (RT) combined with neuromuscular electrical stimulation (NMES) is one method of exercise to improve the deterioration of physical function. However, it is unclear whether low-intensity RT combined with NMES (RT + NMES) can be safely implemented. Objective: This study aimed to examine the influence of low-intensity RT + NMES on autonomic […]

Related Product: Actiheart

Publication Date: September 30, 2020


Test-retest reliability and concurrent validity of the Adapted Short QUestionnaire to ASsess Health-enhancing physical activity (Adapted-SQUASH) in adults with disabilities

The current study determined the test-retest reliability and concurrent validity of the Adapted Short QUestionnaire to ASsess Health-enhancing physical activity (Adapted-SQUASH) in adults with disabilities. Before filling in the Adapted-SQUASH twice with a recall period of two weeks, participants wore the Actiheart activity monitor up to one week. For the test-retest reliability (N=68), Intraclass correlation […]

Related Product: Actiheart

Publication Date: September 9, 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


Active women demonstrate acute autonomic and hemodynamic shifts following exercise in heat and humidity: A pilot study

The purpose of this study was to assess autonomic and hemodynamic recovery in women who performed moderate-intensity exercise in heat. Seven women (31.7 ± 7.6 years, 67.5 ± 4.4 kg, 25.7 ± 5.6% Fat, 43.9 ± 5.1 mL/kg/min) completed two identical bouts of graded treadmill walking (~60% VO2peak). One bout was hot (37.5 ± 1.4°C, […]

Related Product: Actiheart

Publication Date: August 4, 2020


Two weeks of early time-restricted feeding (eTRF) improves skeletal muscle insulin and anabolic sensitivity in healthy men

Background Altering the temporal distribution of energy intake (EI) and introducing periods of intermittent fasting (IF) exert important metabolic effects. Restricting EI to earlier in the day [early time-restricted feeding (eTRF)] is a novel type of IF. Objectives We assessed the chronic effects of eTRF compared with an energy-matched control on whole-body and skeletal muscle […]

Related Product: Actiheart

Publication Date: July 30, 2020


Infusion of donor feces affects the gut-brain axis in humans with metabolic syndrome

Objectives Increasing evidence indicates that intestinal microbiota play a role in diverse metabolic processes via intestinal butyrate production. Human bariatric surgery data suggest that the gut-brain axis is also involved in this process, but the underlying mechanisms remain unknown. Design We compared the effect of fecal microbiota transfer (FMT) from post-Roux-en-Y gastric bypass (RYGB) donors […]

Related Product: Actiheart

Publication Date: July 3, 2020


Resting heart rate as a biomarker for tracking change in cardiorespiratory fitness of UK adults: The Fenland Study

Aims Resting heart rate (RHR) is inversely associated with cardiorespiratory fitness (CRF) but few studies have investigated the nature of this relationship in large population samples. We examined the association between RHR and CRF in UK adults and explored factors that may influence this relationship. Methods and Results In a population-based sample of 5,143 men […]

Related Product: Actiheart

Publication Date: July 2, 2020


Incorporating physiology into the study of psychotherapy process

Increasing evidence indicates that psychological factors important to therapy effectiveness are associated with physiological activity. Knowledge of the physiological correlates of therapy process variables has the potential to provide unique insights into how and why therapy works, but little is currently known about the physiological underpinnings of specific therapy processes that facilitate client growth and […]

Related Product: Actiheart

Publication Date: July 1, 2020


Sleep deprivation: Cytokine and neuroendocrine effects on perception of effort

Introduction: An increased perception of effort and subjective fatigue are thought to be central to decreased exercise performance observed following disrupted sleep. However, there is limited understanding of the mechanisms which underpin these phenomena. We investigated the role of interleukin-6 (IL-6), the soluble interleukin-6 receptor (sIL-6R)) and neuroendocrine factors (cortisol, adrenaline, noradrenaline and brain derived […]

Related Product: Actiheart

Publication Date: June 17, 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


Heart rate variability and long chain n-3 PUFA in patients with chronic kidney disease commencing haemodialysis: a cross-sectional study

The risk of sudden cardiac death (SCD) is doubled when a patient with chronic kidney disease (CKD) stage 5 starts haemodialysis. Low heart rate variability (HRV) has been reported to be independently associated with increased risk of SCD and all cardiac death in haemodialysis patients. Long chain n-3 polyunsaturated fatty acids (LC n-3 PUFA; 20:5n-3, […]

Related Product: Actiheart

Publication Date: June 10, 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


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


Pain intensity and pressure pain thresholds after a light dynamic physical load in patients with chronic neck-shoulder pain

Background: To investigate the development of pain intensity and pressure pain thresholds during and 24 h after a light dynamic physical load among patients with chronic neck-shoulder pain.Methods: Twenty-six patients with chronic neck-shoulder pain and 12 healthy controls were included. The participants arm-cycled on an ergometer. Effort was rated with the Borg Rating of Perceived […]

Related Product: Actiheart

Publication Date: May 1, 2020


Anticipation of 24 h severe energy restriction increases energy intake and reduces physical activity energy expenditure in the prior 24 h, in healthy males

Intermittent fasting involves alternating between severely restricted and unrestricted energy intake. Physical activity energy expenditure (PAEE) is reduced during, and energy intake is elevated after, a period of energy restriction, but whether these are altered in anticipation of energy restriction is unknown. The aim of this study was to assess energy intake and PAEE in […]

Related Product: Actiheart

Publication Date: April 26, 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


Effects of Proximity between Companion Dogs and Their Caregivers on Heart Rate Variability Measures in Older Adults: A Pilot Study

Heart rate variability (HRV) is a noninvasive tool used to evaluate autonomic nervous system function and is affected by age, stress, postural changes, and physical activity. Dog ownership has been associated with higher 24-hr HRV and increased physical activity compared to nonowners. The current pilot study was designed to evaluate the effects of proximity to […]

Related Product: Actiheart

Publication Date: April 13, 2020


Resistance to lean mass gain in constitutional thinness in free‐living conditions is not overpassed by overfeeding

Background Constitutional thinness (CT), a non‐malnourished underweight state with no eating disorders, is characterized by weight gain resistance to high fat diet. Data issued from muscle biopsies suggested blunted anabolic mechanisms in free‐living state. Weight and metabolic responses to protein caloric supplementation has not been yet explored in CT. Methods A 2 week overfeeding (additional […]

Related Product: Actiheart

Publication Date: April 10, 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


Differences in psychomotor activity and heart rate variability in patients with newly diagnosed bipolar disorder, unaffected relatives, and healthy individuals

Background Heart rate variability (HRV) and psychomotor activity have been found reduced in bipolar disorder (BD) but has never been investigated in newly diagnosed BD and unaffected relatives. The present study aimed to compare HRV and psychomotor activity between newly diagnosed patients with BD, their unaffected first-degree relatives (UR), and healthy control individuals (HC). Methods […]

Related Product: Actiheart

Publication Date: March 21, 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


Effect of Plain Versus Sugar‐Sweetened Breakfast on Energy Balance and Metabolic Health

Objective This study investigated the effect of 3 weeks of high‐sugar (“Sweet”) versus low‐sugar (“Plain”) breakfast on energy balance, metabolic health, and appetite. Methods A total of 29 healthy adults (22 women) completed this randomized crossover study. Participants had pre‐ and postintervention appetite, health, and body mass outcomes measured, and they recorded diet, appetite (visual […]

Related Product: Actiheart

Publication Date: February 28, 2020


Estimating maximal oxygen consumption from heart rate response to submaximal ramped treadmill test

The Cambridge Ramped Treadmill Test (CRTT) is an incremental, multistage exercise test (I: steady-state walk, II: walk ramped speed, III: walk ramped incline, and IV: run ramped speed on flat). It is typically deployed as a submaximal test with flexible test termination criteria, making it an attractive option for population-based studies of cardiorespiratory fitness. We […]

Related Product: Actiheart

Publication Date: February 20, 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


Retinal-glia ischemia and inflammation induced by chronic stress: The SABPA study

Background Psychobiological processes linking stress and vascular diseases remain poorly understood. The retina and the brain share a common embryonic-diencephalon origin and blood-barrier physiology e.g. ongoing ischemia facilitates S100B release with astrocytic activity and glial-fibrillary-acidic-protein expression (GFAP). However, GFAP decreases revealed astrocyte pathology in the prefrontal cortex of depression/suicide cases; and might be a key […]

Related Product: Actiheart

Publication Date: February 1, 2020


Fatty fish intervention and psychophysiological responses to mental workload in forensic inpatients: A randomized control trial

The overall aim of this randomized controlled trial was to investigate the effect of a long-term fatty fish intervention during winter time on psychophysiological responses, that is, heart rate variability (HRV), to mental workload. Forty-seven forensic inpatients were randomly assigned into a fish group (FG) or a control group (CG). HRV responses to an experimental […]

Related Product: Actiheart

Publication Date: February 1, 2020


Lipid metabolism links nutrient-exercise timing to insulin sensitivity in men classified as overweight or obese

Context Pre-exercise nutrient availability alters acute metabolic responses to exercise, which could modulate training responsiveness. Objective To assess acute and chronic effects of exercise performed before versus after nutrient ingestion on whole-body and intramuscular lipid utilization and postprandial glucose metabolism. Design (1) Acute, randomized, crossover design (Acute Study); (2) 6-week, randomized, controlled design (Training Study). […]

Related Product: Actiheart

Publication Date: January 30, 2020


Champ4life Study Protocol: A One-Year Randomized Controlled Trial of a Lifestyle Intervention for Inactive Former Elite Athletes with Overweight/Obesity

Preventive and educational programs directed to former elite athletes in the areas of healthy living are required. This is particularly relevant as obesity and health-related problems are observed in retired athletes, especially in those whose current levels of physical activity are below the recommendations. During their sports career, elite athletes are supported by a multidisciplinary […]

Related Product: Actiheart

Publication Date: January 21, 2020


The effect of clinical simulation assessment on stress and anxiety measures in emergency care students

Background Clinical simulation has become widespread as a training and assessment tool across a range of health professions, including emergency care. As with any form of assessment, simulations may be associated with stress and anxiety (“distress”) which may have a negative effect on student performance if demands required by the simulation outweigh the available resources. […]

Related Product: Actiheart

Publication Date: January 7, 2020


Do adolescents with cerebral palsy meet recommendations for healthy weight and physical activity behaviours?.

Purpose: Describe physical activity energy expenditure, body composition, and nutritional intake in adolescents with cerebral palsy (CP) in the context of health recommendations. Materials and methods: A cross-sectional study of 12 adolescents, aged 12–19 years, with CP, classified as Gross Motor Function Classification System levels II–V. Actiheart® accelerometry assessed daily physical activity energy expenditure; Dual […]

Related Product: Actiheart

Publication Date: January 1, 2020


Metabolic rate and muscle activation level when wearing state-of-the-art cold-weather protective clothing during level and inclined walking

Use of cold-weather personal protective clothing (PPC) in cold climates is essential but can add metabolic cost to the wearer. This study measured the effect of wearing state-of-the-art PPC and personal protective equipment (PPE), with the possible effect of clothing layers and fit, on physiological responses including metabolic rate (MR) and muscle activation level. 19 […]

Related Product: Actiheart

Publication Date: January 1, 2020


Effects of Non-neutral Posture and Anthropometry on Heart Rate in Hand Tools Tasks

The use of hand tools in industry is one of the many risky issues for musculoskeletal disorders. Working postures during handling tools assumed may be reiterated several times a day, every day for several years and can be predicted to affect the musculature of the workers. Using physiological demands to assess coordinated posture and anthropometry […]

Related Product: Actiheart

Publication Date: January 1, 2020


Daily running exercise may induce incomplete energy intake compensation: a 7-day crossover trial

Understanding daily exercise effects on energy balance is important. This study examined the effects of 7 days of imposed exercise (EX) and no exercise (N-EX) on free-living energy intake (EI) and physical activity energy expenditure (PAEE) in 9 men. Free-living EI was higher in EX compared with N-EX. Total and vigorous PAEE were higher, with […]

Related Product: Actiheart

Publication Date: January 1, 2020


Dietary Patterns Are Associated with Serum Metabolite Patterns and Their Association Is Influenced by Gut Bacteria among Older German Adults

Background Although dietary intakes and dietary intake patterns (DPs) have been associated with single metabolites, it is unclear whether DPs are also reflected in specific metabolite patterns (MPs). Moreover, the influence of groups of gut bacteria on the relationship between DPs and MPs is underexplored. Objectives We aimed to investigate the association of DPs and […]

Related Product: Actiheart

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


Fundamental Movement Skill Approach to Combat Childhood Obesity in Surabaya, Indonesia: Potential Effects of Video Games Based Exercises (Exergaming)

The study aims to observe the effect of moderate intensity exergaming on mastering of fundamental movement skill and reduction in body mass index (BMI) in overweight and obese children in Surabaya, Indonesia. The participants were 17 primary school students, aged 6-12 years. All participants had a BMI above percentile 85 (overweight and obese) and performed […]

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


Effects of a 12-Week Exercise Intervention on Subsequent Compensatory Behaviors in Adolescent Girls: An Exploratory Study

Purpose: Chronic exercise programs can induce adaptive compensatory behavioral responses through increased energy intake (EI) and/or decreased free-living physical activity in adults. These responses can negate the benefits of an exercise-induced energy deficit; however, it is unclear whether young people experience similar responses. This study examined whether exercise-induced compensation occurs in adolescent girls. Methods: Twenty-three […]

Related Product: Actiheart

Publication Date: December 1, 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


Hydration status affects thirst and salt preference but not energy intake or postprandial ghrelin in healthy adults: A randomised crossover trial

Background Few studies have investigated the effect of hydration status on appetite for food in healthy adults. Prior work suggests hydration status does not alter appetite or energy intake, with mixed findings regarding appetite hormone secretion. However, an extensive investigation into both the psychological and physiological appetitive responses to hydration status has never been conducted. […]

Related Product: Actiheart

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


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