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Schmidt KG, Lerche AF, Christensen MR, Rasmussen CL, Straker L, Mathiassen SE, Holtermann A. Effectiveness of a Goldilocks Work intervention in childcare workers - A cluster-randomized controlled trial. Scand J Work Environ Health 2024; 50:197-207. [PMID: 38436676 PMCID: PMC11057501 DOI: 10.5271/sjweh.4145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Indexed: 03/05/2024] Open
Abstract
OBJECTIVE Poor cardiorespiratory fitness and health is common among childcare workers. We designed the `Goldilocks-games` according to the Goldilocks Work principle to provide high-intensity physical activity for childcare workers. We investigated the effectiveness of this Goldilocks Work intervention in increasing occupational high-intensity physical activity and improving work-related health. METHODS In a two-arm cluster randomized trial, 16 childcare institutions with 142 workers were randomly allocated to either an 8-week Goldilocks Work intervention or a control group. The primary outcome was occupational time in high-intensity physical activity. Secondary outcomes were occupational time in active physical behaviors, heart rate during sleep, pain, physical exhaustion, energy at work, work productivity, and need for recovery. RESULTS The intervention was successfully delivered and received. Both groups had a low amount of occupational high-intensity physical activity at baseline, and the intervention group reported playing the games 3.1 [standard deviation (SD) 1.5] times/week for a duration of 112.2 (SD 175.0) min/week. However, the intervention did not increase high-intensity physical activity or the secondary outcomes, except for energy at work, measured on a scale from 0-10, increasing 0.65 [95% confidence interval (CI) 0.08-1.21], and need for recovery, measured on a scale from 1-5, decreasing -0.32 (95% CI, -0.54- -0.09). CONCLUSION The intervention was successfully delivered and received, but did not increase high-intensity physical activity. The intervention group increased their energy at work and decreased their need for recovery, but not the other health-related outcomes. Further research on how to design and implement health-promoting work environment interventions in childcare is needed.
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Nordholm D, Jensen MA, Kristiansen J, Glenthøj LB, Kristensen TD, Wenneberg C, Hjorthøj C, Garde AH, Nordentoft M. A longitudinal study on physiological stress in individuals at ultra high-risk of psychosis. Schizophr Res 2023; 254:218-226. [PMID: 36996675 DOI: 10.1016/j.schres.2023.03.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 01/19/2023] [Accepted: 03/03/2023] [Indexed: 04/01/2023]
Abstract
INTRODUCTION Individuals at ultra high-risk (UHR) of psychosis exhibit significantly higher stress levels than healthy controls (HC). This study investigates how physiological stress measures differ between HC and UHR individuals and how physiological stress is associated with attenuated psychotic symptoms and changes over time in UHR individuals. Additionally, it examines how the use of medication affects physiological levels of stress. METHOD The study included 72 UHR individuals and 36 HC. UHR were included according to the comprehensive assessment of at-risk mental state (CAARMS); a total-CAARMS score measured the attenuated psychotic symptoms and was calculated from the four psychosis subscales. HC and UHR were examined at baseline, and 47 UHR individuals were followed up after six months. Physiological stress measures were salivary cortisol, alpha-amylase (SAA) and heart-rate variability (HRV). Saliva was collected at four-time points during the day. RESULTS There was no significant difference regarding cortisol (awakening response) or SAA measures between HC and UHR individuals. The use of antipsychotics and antidepressants was associated with low HRV in UHR individuals. In an exploratory analysis of 19 UHR individuals, we found an association between the change in total-CAARMS (six months total-CAARMS minus baseline total CAARMS) and the change in HRV during sleep (six months HRV minus baseline HRV). CONCLUSION Our findings indicate that the use of antipsychotics and antidepressants could be associated with lower HRV in UHR individuals. There might be potential to investigate how HRV develops during the course of illness in UHR individuals.
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Affiliation(s)
- Dorte Nordholm
- Copenhagen Research Center for Mental Health-CORE, Mental Health Center Copenhagen, Copenhagen University Hospital, Denmark.
| | | | - Jesper Kristiansen
- The National Research Centre for the Working Environment, Copenhagen, Denmark
| | - Louise Birkedal Glenthøj
- Copenhagen Research Center for Mental Health-CORE, Mental Health Center Copenhagen, Copenhagen University Hospital, Denmark
| | - Tina Dam Kristensen
- Centre for Clinical Intervention and Neuropsychiatric Schizophrenia Research, CINS, and Center for Neuropsychiatric Schizophrenia Research, CNSR, Mental Health Centre Glostrup, University of Copenhagen, Glostrup, Denmark
| | - Christina Wenneberg
- Copenhagen Research Center for Mental Health-CORE, Mental Health Center Copenhagen, Copenhagen University Hospital, Denmark; Centre for Clinical Intervention and Neuropsychiatric Schizophrenia Research, CINS, and Center for Neuropsychiatric Schizophrenia Research, CNSR, Mental Health Centre Glostrup, University of Copenhagen, Glostrup, Denmark
| | - Carsten Hjorthøj
- Copenhagen Research Center for Mental Health-CORE, Mental Health Center Copenhagen, Copenhagen University Hospital, Denmark; University of Copenhagen, Department of Public Health, Section of Epidemiology, Copenhagen, Denmark
| | - Anne Helene Garde
- The National Research Centre for the Working Environment, Copenhagen, Denmark; University of Copenhagen, Department of Public Health, Copenhagen, Denmark
| | - Merete Nordentoft
- Copenhagen Research Center for Mental Health-CORE, Mental Health Center Copenhagen, Copenhagen University Hospital, Denmark
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Jensen MA, Hansen ÅM, Nabe-Nielsen K, Garde AH, Kristiansen J. Heart rate variability during sleep after two, four and seven consecutive night shifts and recovery days: a cross-over intervention study. Int Arch Occup Environ Health 2022; 95:1443-1451. [PMID: 35916933 DOI: 10.1007/s00420-022-01873-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 02/17/2021] [Indexed: 11/05/2022]
Abstract
OBJECTIVE Recovery after shift work is an important part reducing the health problems related to shift work. Heart rate variability (HRV) is an indicator of the balance between sympathetic and parasympathetic activity in the autonomic nervous system and can be used as a measure of recovery after night shifts. The aim of the study is to investigate autonomic recovery during sleep in response to night work in a crossover intervention study. METHODS Seventeen male police officers working in call centres in five different police district participated in the HRV measurements. The participants were exposed to three interventions: 2 + 2: two consecutive night shifts followed by two consecutive day recovery days; 4 + 4: four consecutive night shifts followed by four consecutive recovery days; 7 + 7: seven consecutive night shifts followed by seven consecutive recovery days. On the last day with night shift and the last recovery day in each intervention the participants underwent 24 h HRV recordings. We analysed HRV during sleep. The five 5-min intervals with the lowest heart rate during each sleep period were chosen for spectral analysis of the heart interbeat interval time series. The five 5-min intervals could occur at any time during sleep. RESULTS There were overall differences in HRV during sleep between days with night shifts and recovery days, primarily in parasympathetic activity. There was no difference in the lowest heart rate obtained, but the timing was different for the three interventions. The lowest heart rate after night shifts occurred 112 (SD 79) min, 174 (SD 115) min and 135 (SD 94) min after sleep onset for the 2 + 2 night shift, the 4 + 4 night shift and the 7 + 7 night shift, respectively. CONCLUSION Overall sleep-related autonomic recovery had higher parasympathetic modulation of cardiac rhythm on the 2 + 2 shift system compared to the 4 + 4 and 7 + 7 shift system.
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Affiliation(s)
| | - Åse Marie Hansen
- Department of Public Health, University of Copenhagen, Copenhagen, Denmark.,National Research Centre for the Working Environment, Copenhagen, Denmark
| | | | - Anne Helene Garde
- National Research Centre for the Working Environment, Copenhagen, Denmark
| | - Jesper Kristiansen
- National Research Centre for the Working Environment, Copenhagen, Denmark
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4
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Korshøj M, Gupta N, Mortensen OS, Jørgensen MB, Holtermann A. Intensity of occupational physical activity in blue-collar workers: do self-reported rating and device-worn measurements agree? Eur J Appl Physiol 2022; 122:1293-1301. [PMID: 35267075 DOI: 10.1007/s00421-022-04920-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 02/17/2022] [Indexed: 11/03/2022]
Abstract
PURPOSE High intensity occupational physical activity (OPA) seem to aggravate health and increase risk of sick leave and early retirement. Most intensity of OPA monitoring has been self-reported, e.g. by rating of perceived exertion (RPE). However, no studies have investigated the precision and risk of bias in RPE reporting during free-living OPA. This study investigated the agreement between OPA intensity in percentage of the heart rate reserve (%HRR) estimated from RPE and device-measured heart rate (HR), and potential bias factors on this agreement. METHODS The CR10 scale measured RPE at work. The Actiheart monitor measured HR during 24-h a day for 2-4 days. Both RPE and device-worn HR were converted to %HRR. The difference between both %HRR and their limits of agreement was determined in a Bland Altman plot. To detect bias factors, the difference between both %HRR was regressed on age, sex, cardiorespiratory fitness, occupational lifting, medication, consequences of musculoskeletal disorders and the interactions between these factors with device-work %HRR. RESULTS Six hundred and twenty-three participants were included in the analysis. Mean difference between RPE-based and device-worn %HRR was 54.6% (SD 19.5). The limits of agreement were wide (11.6-90.1%HRR). Age (0.48%HRR, 95% CI 0.18-0.79) occupational lifting (9.84%HRR, 95% CI 3.85-15.83) and cardiorespiratory fitness (0.41%HRR, 95% CI 0.03-0.79) significantly biased the agreement between the estimations of OPA intensity. CONCLUSION RPE overestimated OPA intensity, and was biased by several factors. Device-worn %HRR should be preferred when evaluating OPA intensity among workers with physically demanding jobs.
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Affiliation(s)
- Mette Korshøj
- National Research Centre for the Working Environment, Lersø Parkallé 105, 2100, Copenhagen, Denmark. .,Department of Occupational and Social Medicine, Holbæk Sygehus, Part of Copenhagen University Hospital, Gl. Ringstedvej 4B, 4300, Holbæk, Denmark.
| | - Nidhi Gupta
- National Research Centre for the Working Environment, Lersø Parkallé 105, 2100, Copenhagen, Denmark
| | - Ole Steen Mortensen
- Department of Occupational and Social Medicine, Holbæk Sygehus, Part of Copenhagen University Hospital, Gl. Ringstedvej 4B, 4300, Holbæk, Denmark.,Department of Public Health, Section of Social Medicine, University of Copenhagen, Øster Farimagsgade 5, 1014, Copenhagen, Denmark
| | - Marie Birk Jørgensen
- Occupational Health and Safety, Copenhagen Municipality, Enghavevej 82, 2450, Copenhagen, Denmark
| | - Andreas Holtermann
- National Research Centre for the Working Environment, Lersø Parkallé 105, 2100, Copenhagen, Denmark.,Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Campusvej 55, 5230, Odense, Denmark
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Does Childcare Work Promote Cardiorespiratory Fitness and Health? A Cross-Sectional Study of Danish Childcare Workers Based on Accelerometry and Heart Rate Measurements. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph182312496. [PMID: 34886220 PMCID: PMC8656773 DOI: 10.3390/ijerph182312496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 11/24/2021] [Accepted: 11/25/2021] [Indexed: 11/17/2022]
Abstract
Childcare workers are reported to have poor cardiorespiratory fitness and health. The Goldilocks Work Principle argues that productive work should be designed with the right composition, intensity and alternations of physical behaviors so that workers get fit and healthy. The purpose of this study was to investigate: (1) composition, (2) intensity and (3) alternations of physical behaviors during work and leisure among childcare workers. Data were collected using accelerometers and heart rate monitors over five workdays among 51 childcare workers at five Danish childcare institutions. Workers mainly spent their work time sedentary (43.0%), spent little time (0.7%) at sufficiently high cardiometabolic intensity to increase cardiorespiratory fitness and often alternated between physical behaviors (67.0% occurred in bouts of <5 min). These findings indicate that the workers have a composition of behaviors at work dominated by sedentary time, little time with high cardiometabolic intensity, and frequent alternations between behaviors. During leisure, workers spent more time sedentary (59.4%), more time at high cardiometabolic intensity (3.4%) and less time occurred in bouts <5 min (38.7%). We see a potential for promoting cardiorespiratory fitness and health of childcare workers by redesigning the way they play with the children, so that work time with high cardiometabolic intensity is increased.
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Grigg EK, Ueda Y, Walker AL, Hart LA, Simas S, Stern JA. Comparative Assessment of Heart Rate Variability Obtained via Ambulatory ECG and Polar Heart Rate Monitors in Healthy Cats: A Pilot Study. Front Vet Sci 2021; 8:741583. [PMID: 34820436 PMCID: PMC8606523 DOI: 10.3389/fvets.2021.741583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Accepted: 10/20/2021] [Indexed: 11/13/2022] Open
Abstract
Chronic exposure to stressful environments can negatively impact cats' health and welfare, affecting behavioral, autonomic, endocrine, and immune function, as with cats in shelters. Low-stress handling practices likely improve shelter cat welfare, but data supporting improved outcomes remain limited. Cardiac activity, particularly heart rate variability (HRV), is an indicator of stress and emotional state in humans and non-human animals, tracking important body functions associated with stress responsiveness, environmental adaptability, mental, and physical health. HRV studies in cats are limited, involving mainly anesthetized or restrained cats. This pilot study tested the feasibility of obtaining HRV data from unrestrained cats, using a commercially available cardiac monitoring system (Polar H10 with chest strap), compared with data from a traditional ambulatory electrocardiogram. Simultaneous data for the two systems were obtained for five adult cats. Overall, the Polar H10 monitor assessments of HRV were lower than the true HRV assessment by ambulatory ECG, except for SDNN. Correlation between the two systems was weak. Possible reasons for the lack of agreement between the two methods are discussed. At this time, our results do not support the use of Polar H10 heart rate monitors for studies of HRV in cats.
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Affiliation(s)
- Emma K Grigg
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, Davis, CA, United States
| | - Yu Ueda
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, United States
| | - Ashley L Walker
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, Davis, CA, United States
| | - Lynette A Hart
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, Davis, CA, United States
| | - Samany Simas
- Department of Animal Science, University of California, Davis, Davis, CA, United States
| | - Joshua A Stern
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, Davis, CA, United States
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7
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Development and Implementation of 'Just Right' Physical Behavior in Industrial Work Based on the Goldilocks Work Principle-A Feasibility Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18094707. [PMID: 33925078 PMCID: PMC8125316 DOI: 10.3390/ijerph18094707] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 04/23/2021] [Accepted: 04/26/2021] [Indexed: 11/17/2022]
Abstract
The Goldilocks Work Principle expresses that productive work should be redesigned to comprise physical behaviors of different intensities in a composition promoting workers' health and fitness. This study is the first to assess the feasibility of redesigning work in an industrial setting according to the Goldilocks Work Principle. We recruited workers (n = 20) from a brewery in Denmark, and we conducted a participatory 16-week intervention including a workshop and two consultations. The workshop aimed to support the workers in modifying their work, while the consultations assisted the eventual implementation. Feasibility was evaluated as per three aspects: (1) developing modifications of work, (2) implementing these modifications, and (3) changing physical behavior and self-reported fatigue, pain and energy. The three aspects were addressed through records completed by the workers, measurements of workers' physical behavior and intensity during 'control' workdays (i.e., usual work) and 'intervention' workdays (i.e., modified work), and self-reported fatigue, pain and energy level following both types of workday. Five modifications to work were developed, and three of these five modifications were implemented. To some extent, physical behavior and intensity changed as intended during 'intervention' workdays compared to 'control' workdays. Workers were also less fatigued, had less pain, and had more energy after 'intervention' workdays. These results suggest that it is feasible to develop and implement modified work based on the Goldilocks Work Principle among industrial workers. However, we also identified several barriers to the implementation of such modifications.
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8
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Zabriskie HA, Kerksick CM, Jagim AR. Active women demonstrate acute autonomic and hemodynamic shifts following exercise in heat and humidity: A pilot study. Temperature (Austin) 2021; 8:64-79. [PMID: 33553506 DOI: 10.1080/23328940.2020.1796242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
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, 46.5 ± 4.6% relative humidity (RH)), and the other was moderate (20.7 ± 1.1°C, 29.9 ± 4.1% RH). For 24 h before and one h after each bout, participants had heart rate variability monitored. After each exercise bout HR and BP were measured during 30 min of supine recovery and 10 min of orthostatic challenge. HF power and RMSSD were lower and LF power and LF:HF ratio greater following exercise in the heat and remained different from the moderate condition for 30 min (p < 0.05). During supine recovery, heat exposure led to higher HR (p = 0.002) and lower DBP (p = 0.016). SBP (p = 0.037) and DBP (p = 0.008) were both lower after 10 min of supine recovery following hot exercise than after moderate temperature. Average response did not reveal orthostatic hypotension despite heat causing a higher HR (p = 0.011) and lower SBP (p = 0.026) after 10 min of orthostatic exposure. Trained women exhibit an autonomic shift toward sympathetic dominance for at least 30 min after exercise in heat. Women who exercise in heat should be wary of an exacerbated HR response after exercise and low recovery blood pressures.
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Affiliation(s)
| | - Chad M Kerksick
- Exercise and Performance Nutrition Laboratory, Department of Exercise Science, Lindenwood University, St. Charles, MO, USA
| | - Andrew R Jagim
- Sports Medicine Research, Mayo Clinic Health Systems, Onalaska, WI, USA
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Hinde K, White G, Armstrong N. Wearable Devices Suitable for Monitoring Twenty Four Hour Heart Rate Variability in Military Populations. SENSORS (BASEL, SWITZERLAND) 2021; 21:1061. [PMID: 33557190 PMCID: PMC7913967 DOI: 10.3390/s21041061] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 01/30/2021] [Accepted: 02/01/2021] [Indexed: 12/22/2022]
Abstract
Heart rate variability (HRV) measurements provide information on the autonomic nervous system and the balance between parasympathetic and sympathetic activity. A high HRV can be advantageous, reflecting the ability of the autonomic nervous system to adapt, whereas a low HRV can be indicative of fatigue, overtraining or health issues. There has been a surge in wearable devices that claim to measure HRV. Some of these include spot measurements, whilst others only record during periods of rest and/or sleep. Few are capable of continuously measuring HRV (≥24 h). We undertook a narrative review of the literature with the aim to determine which currently available wearable devices are capable of measuring continuous, precise HRV measures. The review also aims to evaluate which devices would be suitable in a field setting specific to military populations. The Polar H10 appears to be the most accurate wearable device when compared to criterion measures and even appears to supersede traditional methods during exercise. However, currently, the H10 must be paired with a watch to enable the raw data to be extracted for HRV analysis if users need to avoid using an app (for security or data ownership reasons) which incurs additional cost.
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Affiliation(s)
- Katrina Hinde
- Human and Social Sciences Group, Defence and Science Technology Laboratory, Porton Down, Salisbury SP4 0JQ, UK; (G.W.); (N.A.)
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10
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Horwitz EB, Harmat L, Osika W, Theorell T. The Interplay Between Chamber Musicians During Two Public Performances of the Same Piece: A Novel Methodology Using the Concept of "Flow". Front Psychol 2021; 11:618227. [PMID: 33488486 PMCID: PMC7815933 DOI: 10.3389/fpsyg.2020.618227] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Accepted: 11/30/2020] [Indexed: 11/13/2022] Open
Abstract
The purpose of the study is to explore a new research methodology that will improve our understanding of “flow” through indicators of physiological and qualitative state. We examine indicators of “flow” experienced by musicians of a youth string quartet, two women (25, 29) and two men (23, 24). Electrocardiogram (ECG) equipment was used to record heart rate variability (HRV) data throughout the four movements in one and the same quartet performed during two concerts. Individual physiological indicators of flow were supplemented by assessments of group “state flow” (means from standardized questionnaires) and a group interview in which the musicians provided qualitative data. A matrix was constructed for the characterization of different kinds of demands in the written music in each one of the four movements for each one of the musicians. HRV derived from ECG data showed non-significant trends for group state flow across the eight musical episodes. Individual-level analysis showed that compared to the other players the first violin player had the highest mean heart rate and the lowest increase in high frequency (HF) power in HRV during this particular movement, particularly during the second concert. The qualitative data illustrated how an interplay of synchronized social interactions between this player and their colleagues during the musical performance was associated with a feeling of group state flow and served to support the first violinist. The case illustrates that the proposed mixed methodology drawing on physiological and qualitative data, has the potential to provide meaningful information about experiences of a flow state, both at individual and group levels. Applications in future research are possible.
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Affiliation(s)
- Eva Bojner Horwitz
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.,Department of Music, Pedagogy and Society, Royal College of Music, Stockholm, Sweden.,Department of Neurobiology, Care Sciences and Society, Center for Social Sustainability, Karolinska Institutet, Stockholm, Sweden
| | - László Harmat
- Department of Psychology, Faculty of Health and Life Sciences, Linnaeus University, Växjö, Sweden
| | - Walter Osika
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.,Department of Neurobiology, Care Sciences and Society, Center for Social Sustainability, Karolinska Institutet, Stockholm, Sweden.,Northern Stockholm Psychiatry, Stockholm, Sweden
| | - Töres Theorell
- Department of Music, Pedagogy and Society, Royal College of Music, Stockholm, Sweden.,Stress Research Institute, Stockholm, Sweden
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11
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Jump O, Dockray S. Cardiovascular Responses to Stress Utilizing Anticipatory Singing Tasks. J PSYCHOPHYSIOL 2020. [DOI: 10.1027/0269-8803/a000269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Abstract. Models of psychobiological stress reactivity have a foundation in the measurement of responses to standardized stress tasks. Tasks with anticipatory phases have been proposed as an effective method of stress induction, either as a stand-alone task or replacement constituent elements for existing stressor paradigms. Tasks utilizing singing as a primary stressor have been proposed but the efficacy of these tasks have not been demonstrated while maintaining adherence to a resting/reactivity/recovery framework desirable for heart rate variability (HRV) measurement. This study examines the viability of an anticipatory sing-a-song task as a method for inducing mental stress and examines the utility of the task with specific reference to measures of cardiovascular reactivity and recovery activity, and standard protocols to examine HRV reactivity and recovery. Participants completed a dual task with a math task and an anticipation of singing component. Responses were examined according to a resting/reactivity/recovery paradigm and the findings indicate that the sing-a-song stimulus is effective in generating a stress response. Significant differences in heart rate and self-reported stress between baseline and stressor conditions were detected, with greater magnitude differences between baseline and anticipatory phases. This study has demonstrated the viability of the anticipation of singing as a standardized stressor using cardiovascular measures and has described variants of this task that may be used for repeated measures study designs.
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Affiliation(s)
- Owen Jump
- School of Applied Psychology, University College Cork, Ireland
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12
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Stevens ML, Crowley P, Holtermann A, Mortensen OS, Korshøj M. Cardiorespiratory fitness, occupational aerobic workload and age: workplace measurements among blue-collar workers. Int Arch Occup Environ Health 2020; 94:503-513. [PMID: 33161441 PMCID: PMC8032632 DOI: 10.1007/s00420-020-01596-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Accepted: 10/20/2020] [Indexed: 12/13/2022]
Abstract
BACKGROUND The knowledge, from laboratory studies dating back to the 1950s on the importance of the association between cardiorespiratory fitness and aerobic workload for workers health, is fundamental for promoting sustainable healthy employability among ageing blue-collar workers today. However, the association between cardiorespiratory fitness and aerobic workload has not yet been documented during daily work, and we do not know if it applies to the normal work of blue-collar workers in different age groups. We aim to investigate the association between cardiorespiratory fitness and aerobic workload among blue-collar workers using measurements of 24-h heart rate collected over consecutive working days. METHODS We analyzed baseline cardiorespiratory fitness, assessed using a sub-maximal cycle ergometer test, and 1-4 days of 24-h heart rate measurement from 497 blue-collar workers participating in the DPHACTO study. We investigated the association between cardiorespiratory fitness and aerobic workload defined as the average percentage of heart rate reserve (%HRR), maximum %HRR and the duration time spent at a high HRR (> 30%) during working hours. The association was assessed using multivariate linear regression models adjusted for age, sex, self-rated health, shift-work, prescription medication and occupation, as well as for different age strata. RESULTS Higher cardiorespiratory fitness was significantly associated with decreased mean %HRR -0.32 [95% CI -0.39 to -0.25], maximum %HRR -0.35 [95% CI -0.45 to -0.25] and time spent at ≥ 30% HRR; -1.8% [95% CI -2.2 to -1.5%]. These associations were evident across age groups, with slightly stronger associations for workers aged 46-51 (total range 18-68). CONCLUSIONS Higher cardiorespiratory fitness was associated with the decreased aerobic workload during normal work across all age groups and levels of work intensity. Our findings highlight the importance of cardiorespiratory fitness when considering the workload and its relevance in the promotion of healthy sustainable employment.
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Affiliation(s)
| | - Patrick Crowley
- The National Research Centre for the Work Environment, Copenhagen, Denmark
| | - Andreas Holtermann
- The National Research Centre for the Work Environment, Copenhagen, Denmark
- Institute of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark
| | - Ole Steen Mortensen
- Section of Social Medicine, Department of Public Health, University of Copenhagen, Copenhagen, Denmark
- Department of Occupational and Social Medicine, Copenhagen University Hospital Holbæk, Holbaek, Denmark
| | - Mette Korshøj
- The National Research Centre for the Work Environment, Copenhagen, Denmark
- Department of Occupational and Social Medicine, Copenhagen University Hospital Holbæk, Holbaek, Denmark
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13
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Lerche AF, Vilhelmsen M, Schmidt KG, Kildedal R, Launbo N, Munch PK, Lidegaard M, Jacobsen SS, Rasmussen CL, Mathiassen SE, Straker L, Holtermann A. Can Childcare Work Be Designed to Promote High Intensity Physical Activity for Improved Fitness and Health? A Proof of Concept Study of the Goldilocks Principle. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17207419. [PMID: 33053791 PMCID: PMC7600739 DOI: 10.3390/ijerph17207419] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 09/18/2020] [Accepted: 10/04/2020] [Indexed: 12/12/2022]
Abstract
Childcare workers are reported to have high variation in physical activity during work hours, but also to sit for about half of the workday and have almost no high intensity physical activity (HIPA). No study has investigated if their work can be re-designed to introduce HIPA, thus promoting fitness and health according to the Goldilocks principle. This study investigated the feasibility of designing pedagogical games (‘Goldilocks-games’) intended to lead to more HIPA. Heart rate was measured in nineteen childcare workers during Goldilocks-games, and compared to measurements during a regular workday. Worker perceptions of feasibility, and researcher observations of contextual factors were also collected. The Goldilocks-games (33 min) elicited significantly more HIPA (18/33 min) compared to the most active period of equal length on a regular workday (0.5/33 min). Seventy-four-percent of the childcare workers reported that it was feasible to integrate the Goldilocks-games pedagogically, and seventy-two-percent could see themselves using them. Thus, we found it possible to re-design a work task in childcare according to the Goldilocks principle so that it leads to substantial time with HIPA. The sustainability of Goldilocks-games in childcare, and their effectiveness in improving fitness and health among childcare workers, needs to be tested in further studies.
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Affiliation(s)
- Anders Fritz Lerche
- The National Research Centre for the Working Environment, 2100 Copenhagen, Denmark; (M.V.); (K.G.S.); (R.K.); (N.L.); (P.K.M.); (S.S.J.); (C.L.R.); (A.H.)
- Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, 5230 Odense, Denmark
- Correspondence:
| | - Maja Vilhelmsen
- The National Research Centre for the Working Environment, 2100 Copenhagen, Denmark; (M.V.); (K.G.S.); (R.K.); (N.L.); (P.K.M.); (S.S.J.); (C.L.R.); (A.H.)
| | - Kathrine Greby Schmidt
- The National Research Centre for the Working Environment, 2100 Copenhagen, Denmark; (M.V.); (K.G.S.); (R.K.); (N.L.); (P.K.M.); (S.S.J.); (C.L.R.); (A.H.)
| | - Rasmus Kildedal
- The National Research Centre for the Working Environment, 2100 Copenhagen, Denmark; (M.V.); (K.G.S.); (R.K.); (N.L.); (P.K.M.); (S.S.J.); (C.L.R.); (A.H.)
| | - Natja Launbo
- The National Research Centre for the Working Environment, 2100 Copenhagen, Denmark; (M.V.); (K.G.S.); (R.K.); (N.L.); (P.K.M.); (S.S.J.); (C.L.R.); (A.H.)
| | - Pernille Kold Munch
- The National Research Centre for the Working Environment, 2100 Copenhagen, Denmark; (M.V.); (K.G.S.); (R.K.); (N.L.); (P.K.M.); (S.S.J.); (C.L.R.); (A.H.)
| | - Mark Lidegaard
- Novo Nordisk Health & Safety, Novo Nordisk A/S, 2880 Bagsværd, Denmark;
| | - Sandra Schade Jacobsen
- The National Research Centre for the Working Environment, 2100 Copenhagen, Denmark; (M.V.); (K.G.S.); (R.K.); (N.L.); (P.K.M.); (S.S.J.); (C.L.R.); (A.H.)
| | - Charlotte Lund Rasmussen
- The National Research Centre for the Working Environment, 2100 Copenhagen, Denmark; (M.V.); (K.G.S.); (R.K.); (N.L.); (P.K.M.); (S.S.J.); (C.L.R.); (A.H.)
- Department of Public Health, Section of Social Medicine, University of Copenhagen, 1165 Copenhagen, Denmark
| | - Svend Erik Mathiassen
- Centre for Musculoskeletal Research, Department of Occupational Health Sciences and Psychology, University of Gävle, 801 76 Gävle, Sweden;
| | - Leon Straker
- School of Physiotherapy and Exercise Science, Curtin University, Perth, WA 6102, Australia;
| | - Andreas Holtermann
- The National Research Centre for the Working Environment, 2100 Copenhagen, Denmark; (M.V.); (K.G.S.); (R.K.); (N.L.); (P.K.M.); (S.S.J.); (C.L.R.); (A.H.)
- Department of Public Health, Section of Social Medicine, University of Copenhagen, 1165 Copenhagen, Denmark
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Kutsuna T, Sugawara H, Kurita H, Kusaka S, Takahashi T. The influence of low-intensity resistance training combined with neuromuscular electrical stimulation on autonomic activity in healthy adults: A randomized controlled cross-over trial. Hong Kong Physiother J 2020; 41:15-23. [PMID: 34054253 PMCID: PMC8158405 DOI: 10.1142/s1013702521500013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 08/06/2020] [Indexed: 12/28/2022] Open
Abstract
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 activity and cardiovascular responses in healthy adults. Methods: This study was an open-label, randomized controlled cross-over trial. The exercise intensity of isometric knee extension RT was set to 40% of the maximum voluntary contraction (peak torque). NMES was adjusted to a biphasic asymmetrical waveform with the frequency maintained at 50 Hz and a phase duration of 300 μs. The difference in the change in autonomic activity and cardiovascular responses was compared by assessing heart rate variability, blood pressure, and heart rate during RT and RT+NMES. Results: Twenty healthy male college students (mean age 21.0±0.6 years) participated in this study. The ratio of low- and high-frequency components of heart rate variability, systolic blood pressure, and heart rate increased during exercise in the RT and RT+NMES sessions (P<0.05). There were no significant differences in autonomic activity and cardiovascular responses throughout the sessions during RT and RT+NMES. Conclusion: In conclusion, our results demonstrated that low-intensity RT+NMES was safe and did not induce excessive autonomic and cardiovascular responses in healthy adults.
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Affiliation(s)
- Toshiki Kutsuna
- Department of Physical Therapy, School of Health Sciences, Tokyo University of Technology, Tokyo, Japan
| | - Hitoshi Sugawara
- Department of Physical Therapy, School of Health Sciences, Tokyo University of Technology, Tokyo, Japan
| | - Hideaki Kurita
- Department of Physical Therapy, School of Health Sciences, Tokyo University of Technology, Tokyo, Japan
| | - Satomi Kusaka
- Department of Physical Therapy, School of Health Sciences, Tokyo University of Technology, Tokyo, Japan
| | - Tetsuya Takahashi
- Department of Physical Therapy, School of Health Sciences, Tokyo University of Technology, Tokyo, Japan
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15
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Accuracy of pulse rate derived from 24-h ambulatory blood pressure monitoring compared with heart rate from 24-h Holter-ECG. J Hypertens 2020; 38:2387-2392. [DOI: 10.1097/hjh.0000000000002566] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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16
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Deits-Lebehn C, Baucom KJW, Crenshaw AO, Smith TW, Baucom BRW. Incorporating physiology into the study of psychotherapy process. J Couns Psychol 2020; 67:488-499. [PMID: 32614229 PMCID: PMC7899534 DOI: 10.1037/cou0000391] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
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 change. The goal of this article is to introduce therapy process researchers to the use of physiological methods for studying therapy process variables. We do this by (a) presenting a conceptual framework for the study of therapy process variables, (b) providing an introductory overview of physiological systems with particular promise for the study of therapy process variables, (c) introducing the primary methods and methodological decisions involved in physiological research, and (d) demonstrating these principles and methods in a case of therapeutic presence during couple therapy. We close with a discussion of the promise and challenges in the study of physiological correlates of therapy process variables and consideration of future challenges and open questions in this line of research. Online supplemental materials include additional resources for therapy process researchers interested in getting started with physiological research. (PsycInfo Database Record (c) 2020 APA, all rights reserved).
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17
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Freyberg J, Brage S, Kessing LV, Faurholt-Jepsen M. Differences in psychomotor activity and heart rate variability in patients with newly diagnosed bipolar disorder, unaffected relatives, and healthy individuals. J Affect Disord 2020; 266:30-36. [PMID: 32056891 PMCID: PMC7116568 DOI: 10.1016/j.jad.2020.01.110] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Revised: 11/22/2019] [Accepted: 01/20/2020] [Indexed: 11/24/2022]
Abstract
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 20 newly diagnosed patients with BD, 20 of their UR, and 20 age- and sex-matched HC were included. Measurements of HRV for five minutes and heart rate and acceleration for seven days were conducted. Activity energy expenditure (AEE) was derived from the latter. Linear mixed effect regression models were conducted to compare the three groups. RESULTS HRV did not differ in any measure between the three groups of participants. Similarly, AEE (kJ/day/kg) did not differ between the three groups in neither daily means (BD: 63.6, UR: 64.1, HC: 62.1) nor when divided into quarter-daily intervals. LIMITATIONS The relatively small size of the study may affect the validity of the results. CONCLUSION Patients with newly diagnosed BD and UR do not present with decreased HRV or AEE. These results contrast prior findings from BD patients with more advanced stages of the disorder, suggesting that these outcomes progress with illness duration.
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Affiliation(s)
- Josefine Freyberg
- The Copenhagen Affective Disorder research Center (CADIC), Psychiatric Center Copenhagen, Rigshospitalet, and Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Søren Brage
- MRC Epidemiology Unit, Cambridge, United Kingdom
| | - Lars Vedel Kessing
- The Copenhagen Affective Disorder research Center (CADIC), Psychiatric Center Copenhagen, Rigshospitalet, and Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Maria Faurholt-Jepsen
- The Copenhagen Affective Disorder research Center (CADIC), Psychiatric Center Copenhagen, Rigshospitalet, and Faculty of Health and Medical Sciences, University of Copenhagen, Denmark.
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18
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Sűdy ÁR, Ella K, Bódizs R, Káldi K. Association of Social Jetlag With Sleep Quality and Autonomic Cardiac Control During Sleep in Young Healthy Men. Front Neurosci 2019; 13:950. [PMID: 31555086 PMCID: PMC6742749 DOI: 10.3389/fnins.2019.00950] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 08/22/2019] [Indexed: 01/23/2023] Open
Abstract
Social jetlag (SJL), the difference in sleep timing between work and free days is a consequence of the discrepancy between the individual’s circadian rhythm and the social clock. SJL is considered a chronic stress factor and has been linked to various health problems. In this field study, we examined for the first time the association between SJL and cardiac regulation during sleep. 33 healthy young men aged 20–26 years participated in the study. The median SJL was used as a cut-off value to assign the participants into two groups with either lower or higher SJL. As a marker of autonomic control we analyzed heart rate variability (HRV) and addressed intra-individual differences between workdays and free days. In subjects with higher SJL, pNN50, an indicator of vagal activity was lower in the first 3 h of sleep on workday as compared to free day (day × sleep block × group, p = 0.015), indicating a more adaptable regulation on free days, when subjects slept according to their own preference. However, in subjects with lower SJL, no HRV differences were found between the two nights. SJL showed correlation with the free day-workday differences of both pNN50 and another vagal index, RMSSD in the first 2 h of sleep (p = 0.023 and 0.047, respectively). In subjects with higher SJL, a different HF power on workdays and free days (p = 0.031) also indicated that a shift in sleep timing is accompanied by an altered parasympathetic activity in the first few hours of sleep. Furthermore, subjective sleep quality on workdays was negatively associated with SJL (p = 0.02), and subjects with higher SJL reported worse sleep quality on workday than on free day (p = 0.027). Taken together, our data call attention on the potential effect of SJL on sleep quality and vagal activity during sleep.
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Affiliation(s)
- Ágnes Réka Sűdy
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Krisztina Ella
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Róbert Bódizs
- Institute of Behavioural Sciences, Semmelweis University, Budapest, Hungary.,National Institute of Clinical Neurosciences, Budapest, Hungary
| | - Krisztina Káldi
- Department of Physiology, Semmelweis University, Budapest, Hungary.,Department of Laboratory Medicine, Semmelweis University, Budapest, Hungary
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19
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Dockray S, O'Neill S, Jump O. Measuring the Psychobiological Correlates of Daily Experience in Adolescents. JOURNAL OF RESEARCH ON ADOLESCENCE : THE OFFICIAL JOURNAL OF THE SOCIETY FOR RESEARCH ON ADOLESCENCE 2019; 29:595-612. [PMID: 31573767 DOI: 10.1111/jora.12473] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Mapping the psychobiological correlates of social contexts, experiences, and emotional responses of adolescents in their daily lives provides insight into how adolescent well-being shapes, and is shaped by, experience. Measures of these psychobiological correlates are enabled by devices and technologies that must be precise and suitable for adolescent participants. The present report reviews the most often used research measures, and suggests strategies for best practice, drawn from practical experience. The rapid advances in technological methods to collect attuned measures of psychological processes, social context, and biological function indicate the promise for multimodal measures in ecological settings. Attaining these methodological goals will support research to secure comprehensive, quality data, and advance the understanding of psychobiological function in ambulatory settings.
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20
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Lund Rasmussen C, Palarea-Albaladejo J, Korshøj M, Gupta N, Nabe-Nielsen K, Holtermann A, Jørgensen MB. 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. PLoS One 2019; 14:e0217024. [PMID: 31170169 PMCID: PMC6553845 DOI: 10.1371/journal.pone.0217024] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Accepted: 04/30/2019] [Indexed: 01/01/2023] Open
Abstract
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 was measured as percentage of heart rate reserve during work (%HRR). Leisure time movement behaviours were expressed in terms of leisure time spent in sedentary and active behaviours in uninterrupted bouts (i.e. <10 min, ≥10–30 min and >30 min). Compositional regression and isotemporal substitution models were used to assess the association between the predominance of work time spent at ≥40%HRR and leisure time spent in sedentary and active bouts. All analyses were stratified by sex. Results For men, there was no statistically significant association between the predominance of work time spent at ≥40%HRR and leisure time movement behaviours. Among women, the predominance of ≥40%HRR at work was negatively associated with relative leisure time spent in ≥10 min bouts of active behaviour ( β^ = -0.21, p = 0.02) and a theoretical 15 min reallocation of work time from <40%HRR to ≥40%HRR was estimated to decrease active behaviour by 6 min during leisure time. Conclusion Our result highlights the need for considering work-related barriers for an active leisure time in high-risk populations. Longitudinal studies are warranted to disentangle the relationship between physically demanding work characteristics and leisure time movement behaviours in such populations.
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Affiliation(s)
- Charlotte Lund Rasmussen
- National Research Centre for the Working Environment, Copenhagen, Denmark
- Section of Social Medicine, Department of Public Health, University of Copenhagen, Copenhagen, Denmark
- * E-mail:
| | | | - Mette Korshøj
- National Research Centre for the Working Environment, Copenhagen, Denmark
| | - Nidhi Gupta
- National Research Centre for the Working Environment, Copenhagen, Denmark
| | - Kirsten Nabe-Nielsen
- National Research Centre for the Working Environment, Copenhagen, Denmark
- Section of Social Medicine, Department of Public Health, University of Copenhagen, Copenhagen, Denmark
| | - Andreas Holtermann
- National Research Centre for the Working Environment, Copenhagen, Denmark
- Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark
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21
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Jørgensen MB, Gupta N, Korshøj M, Lagersted-Olsen J, Villumsen M, Mortensen OS, Skotte J, Søgaard K, Madeleine P, Samani A, Ørberg A, Rasmussen CL, Holtermann A. The DPhacto cohort: An overview of technically measured physical activity at work and leisure in blue-collar sectors for practitioners and researchers. APPLIED ERGONOMICS 2019; 77:29-39. [PMID: 30832776 DOI: 10.1016/j.apergo.2019.01.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 01/14/2019] [Accepted: 01/17/2019] [Indexed: 05/27/2023]
Abstract
For improved prevention of health issues among blue-collar workers, there is a need for an overview of the physical activity at work and leisure using technical long-term measurements in blue-collar sectors investigation of differences between the sectors. Thus, the objective of this paper was to provide an overview and investigate differences in physical activities and body postures at work and leisure among blue-collar sectors. The Dphacto cohort consists of 1087 workers from manufacturing, transportation and cleaning sectors (901 blue-collar and 186 white-collar workers) in Denmark. Eligible workers provided physical activity and heart rate measurements over several days with follow-up on health-related outcomes by self-report and registers. Considerable differences in sitting, standing, time on feet (walking, shuffling and standing combined) and forward bending of the back were found between work and leisure, and between the sectors. This overview of physical activity at work and leisure can be useful for better prevention of work-related health issues among blue-collar workers.
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Affiliation(s)
- Marie Birk Jørgensen
- Department of Forensic Medicine, University of Copenhagen, 2100, Copenhagen, Denmark.
| | - Nidhi Gupta
- National Research Centre for the Working Environment, Copenhagen, Denmark
| | - Mette Korshøj
- National Research Centre for the Working Environment, Copenhagen, Denmark
| | | | - Morten Villumsen
- National Research Centre for the Working Environment, Copenhagen, Denmark; Sport Sciences, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Aalborg East, Denmark; Department of Public Health and Nursing, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| | - Ole Steen Mortensen
- Department of Occupational and Social Medicine, Copenhagen University Hospital Holbæk, Denmark; Section of Social Medicine, Department of Public Health, University of Copenhagen, Denmark
| | - Jørgen Skotte
- National Research Centre for the Working Environment, Copenhagen, Denmark
| | - Karen Søgaard
- Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark
| | - Pascal Madeleine
- Sport Sciences, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Aalborg East, Denmark
| | - Afshin Samani
- Sport Sciences, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Aalborg East, Denmark
| | - Anders Ørberg
- Department of Epidemiology and Biostatistics, Central Region, Denmark
| | - Charlotte Lund Rasmussen
- National Research Centre for the Working Environment, Copenhagen, Denmark; Section of Social Medicine, Department of Public Health, University of Copenhagen, Denmark
| | - Andreas Holtermann
- National Research Centre for the Working Environment, Copenhagen, Denmark; Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark
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22
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Brandt M, Madeleine P, Samani A, Ajslev JZ, Jakobsen MD, Sundstrup E, Andersen LL. Effects of a Participatory Ergonomics Intervention With Wearable Technical Measurements of Physical Workload in the Construction Industry: Cluster Randomized Controlled Trial. J Med Internet Res 2018; 20:e10272. [PMID: 30567694 PMCID: PMC6315250 DOI: 10.2196/10272] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Revised: 09/04/2018] [Accepted: 09/10/2018] [Indexed: 12/22/2022] Open
Abstract
Background Construction work frequently involves heavy physical work, and a reduction of the physical workload should have high priority. Technological development has made it possible to obtain field measurements with surface electromyography (sEMG), kinematics measured with inertial measurement units (IMUs), and video recordings. However, no studies have used these methods simultaneously to detect situations with excessive physical workload (events) during a working day. Thus, knowledge about these specific events may combat work-related risk factors. Participatory ergonomics (PE) has shown promising results, but whether it can be used as a tool to reduce the physical workload during construction work remains unknown. Objective This cluster randomized controlled trial investigated whether a PE intervention with technical measurements consisting of IMUs, sEMG, heart rate monitoring, and video recordings of physical workload could reduce the number of events with excessive physical workload during a working day. Furthermore, other outcomes were obtained from questionnaires. Methods A total of 80 male full-time construction workers (aged 19 to 67 years) were randomized at the cluster level (gang) to a PE intervention consisting of 3 workshops (7 gangs and 32 workers) or to a control group (8 gangs and 48 workers). The physical workload was recorded by technical measurements, that is, IMUs, sEMG, heart rate monitoring, and video recordings during a full working day at baseline and 3 and 6 months’ follow-up. On the basis of the technical measurements, a custom-made computer program detected the situations (events) where the construction workers were exposed to excessive physical workload and used in the intervention. Differences in the number of events from baseline to follow-up between intervention and control were evaluated using linear mixed models (intention-to-treat), with individual nested in cluster as a random factor. Furthermore, questionnaires were filled out on test days. Results The results of the primary outcome showed no change in the number of events with excessive physical workload. However, compared with the control group, the other outcomes showed decreased general fatigue after a typical working day (P=.001) and increased influence on own work (P=.04). Conclusions This PE intervention with technical measurements did not reduce the number of events with excessive physical workload during construction work. However, the intervention led to decreased general fatigue and increased influence on own work. Trial Registration ClinicalTrials.gov NCT02498197; https://clinicaltrials.gov/ct2/show/NCT02498197 (Archived by WebCite at http://www.webcitation.org/74SZ3DIWS)
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Affiliation(s)
- Mikkel Brandt
- National Research Centre for the Working Environment, Copenhagen, Denmark.,Sport Sciences, Department of Health Science and Technology, Aalborg University, Aalborg, Denmark
| | - Pascal Madeleine
- Sport Sciences, Department of Health Science and Technology, Aalborg University, Aalborg, Denmark
| | - Afshin Samani
- Sport Sciences, Department of Health Science and Technology, Aalborg University, Aalborg, Denmark
| | - Jeppe Zn Ajslev
- National Research Centre for the Working Environment, Copenhagen, Denmark
| | - Markus D Jakobsen
- National Research Centre for the Working Environment, Copenhagen, Denmark
| | - Emil Sundstrup
- National Research Centre for the Working Environment, Copenhagen, Denmark
| | - Lars L Andersen
- National Research Centre for the Working Environment, Copenhagen, Denmark.,Sport Sciences, Department of Health Science and Technology, Aalborg University, Aalborg, Denmark
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23
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de Oliveira Sato T, Hallman DM, Kristiansen J, Holtermann A. The association between multisite musculoskeletal pain and cardiac autonomic modulation during work, leisure and sleep - a cross-sectional study. BMC Musculoskelet Disord 2018; 19:405. [PMID: 30458750 PMCID: PMC6247621 DOI: 10.1186/s12891-018-2312-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 10/22/2018] [Indexed: 01/09/2023] Open
Abstract
Background The prevention and rehabilitation of multisite musculoskeletal pain would benefit from studies aiming to understand its underlying mechanism. Autonomic imbalance is a suggested mechanism for multisite pain, but hardly been studied during normal daily living. Therefore, the aim of the study is to investigate the association between multisite musculoskeletal pain and cardiac autonomic modulation during work, leisure and sleep. Methods This study is based on data from the “Danish Physical activity cohort with objective measurements” among 568 blue-collar workers. Pain intensity scales were dichotomized according to the median of each scale, and the number of pain sites was calculated. No site was regarded as the pain-free, one site was considered as single-site musculoskeletal pain and pain in two or more sites was regarded as multisite musculoskeletal pain. Heart rate variability (HRV) was measured by an electrocardiogram system (ActiHeart) and physical activity using accelerometers (Actigraph). Crude and adjusted linear mixed models were applied to investigate the association between groups and cardiac autonomic regulation during work, leisure and sleep. Results There was no significant difference between groups and no significant interaction between groups and domains in the crude or adjusted models for any HRV index. Significant differences between domains were found in the crude and adjusted model for all indices, except SDNN; sleep time showed higher values than leisure and work time, except for LF and LF/HF, which were higher during work. Conclusion This cross-sectional study showed that multisite musculoskeletal pain is not associated with imbalanced cardiac autonomic regulation during work, leisure and sleep time. Electronic supplementary material The online version of this article (10.1186/s12891-018-2312-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Tatiana de Oliveira Sato
- Physical Therapy Department, Federal University of São Carlos (UFSCar), Rodovia Washington Luís, km 235, São Carlos, SP, 13565-905, Brazil.
| | - David M Hallman
- Centre for Musculoskeletal Research, Department of Occupational and Public Health Sciences, University of Gävle, 801-76, Gävle, SE, Sweden
| | - Jesper Kristiansen
- National Research Centre for the Working Environment (NRCWE), Lersø Parkallé 105, 2100, Copenhagen Ø, DK, Denmark
| | - Andreas Holtermann
- National Research Centre for the Working Environment (NRCWE), Lersø Parkallé 105, 2100, Copenhagen Ø, DK, Denmark.,Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark
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24
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Chen H, Lv K, Ji G, Liu Z, Guo J, Wan Y, Wang L, Li Z, Li Y, Qu L. Characterization of sleep-wake patterns in crew members under a short-duration spaceflight. BIOL RHYTHM RES 2018. [DOI: 10.1080/09291016.2018.1533730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Hailong Chen
- State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing, China
- Department of health technology research and development, Space Institute of Southern China (Shenzhen), Shenzhen, China
| | - Ke Lv
- State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing, China
| | - Guohua Ji
- State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing, China
| | - Zhizhen Liu
- National Key Laboratory of Human Factors Engineering, China Astronaut Research and Training Center, Beijing, China
| | - Jinhu Guo
- Key Laboratory of Gene Engineering of the Ministry of Education, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Yumin Wan
- State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing, China
| | - Linjie Wang
- State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing, China
| | - Zhili Li
- State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing, China
| | - Yinghui Li
- State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing, China
- Department of health technology research and development, Space Institute of Southern China (Shenzhen), Shenzhen, China
| | - Lina Qu
- State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing, China
- Department of health technology research and development, Space Institute of Southern China (Shenzhen), Shenzhen, China
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Stress Detection Using Low Cost Heart Rate Sensors. JOURNAL OF HEALTHCARE ENGINEERING 2018; 2016. [PMID: 27372071 PMCID: PMC5058562 DOI: 10.1155/2016/5136705] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Accepted: 05/05/2016] [Indexed: 12/01/2022]
Abstract
The automated detection of stress is a central problem for ambient assisted living solutions. The paper presents the concepts and results of two studies targeted at stress detection with a low cost heart rate sensor, a chest belt. In the device validation study (n = 5), we compared heart rate data and other features from the belt to those measured by a gold standard device to assess the reliability of the sensor. With simple synchronization and data cleaning algorithm, we were able to select highly (>97%) correlated, low average error (2.2%) data segments of considerable length from the chest data for further processing. The protocol for the clinical study (n = 46) included a relax phase followed by a phase with provoked mental stress, 10 minutes each. We developed a simple method for the detection of the stress using only three time-domain features of the heart rate signal. The method produced accuracy of 74.6%, sensitivity of 75.0%, and specificity of 74.2%, which is impressive compared to the performance of two state-of-the-art methods run on the same data. Since the proposed method uses only time-domain features, it can be efficiently implemented on mobile devices.
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Baucom BRW, Baucom KJW, Hogan JN, Crenshaw AO, Bourne SV, Crowell SE, Georgiou P, Goodwin MS. Cardiovascular Reactivity During Marital Conflict in Laboratory and Naturalistic Settings: Differential Associations with Relationship and Individual Functioning Across Contexts. FAMILY PROCESS 2018; 57:662-678. [PMID: 29577270 DOI: 10.1111/famp.12353] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Cardiovascular reactivity during spousal conflict is considered to be one of the main pathways for relationship distress to impact physical, mental, and relationship health. However, the magnitude of association between cardiovascular reactivity during laboratory marital conflict and relationship functioning is small and inconsistent given the scope of its importance in theoretical models of intimate relationships. This study tests the possibility that cardiovascular data collected in laboratory settings downwardly bias the magnitude of these associations when compared to measures obtained in naturalistic settings. Ambulatory cardiovascular reactivity data were collected from 20 couples during two relationship conflicts in a research laboratory, two planned relationship conflicts at couples' homes, and two spontaneous relationship conflicts during couples' daily lives. Associations between self-report measures of relationship functioning, individual functioning, and cardiovascular reactivity across settings are tested using multilevel models. Cardiovascular reactivity was significantly larger during planned and spontaneous relationship conflicts in naturalistic settings than during planned relationship conflicts in the laboratory. Similarly, associations with relationship and individual functioning variables were statistically significantly larger for cardiovascular data collected in naturalistic settings than the same data collected in the laboratory. Our findings suggest that cardiovascular reactivity during spousal conflict in naturalistic settings is statistically significantly different from that elicited in laboratory settings both in magnitude and in the pattern of associations with a wide range of inter- and intrapersonal variables. These differences in findings across laboratory and naturalistic physiological responses highlight the value of testing physiological phenomena across interaction contexts in romantic relationships.
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Affiliation(s)
- Brian R W Baucom
- Department of Psychology, University of Utah, Salt Lake City, UT
| | | | - Jasara N Hogan
- Department of Psychology, University of Utah, Salt Lake City, UT
| | | | - Stacia V Bourne
- Department of Psychology, University of Utah, Salt Lake City, UT
| | - Sheila E Crowell
- Department of Psychology, University of Utah, Salt Lake City, UT
| | - Panayiotis Georgiou
- Department of Electrical Engineering, University of Southern California, Los Angeles, CA
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Rasmussen CDN, Hendriksen PR, Svendsen MJ, Ekner D, Hansen K, Sørensen OH, Svendsen SW, van der Beek AJ, Holtermann A. Improving work for the body - a participatory ergonomic intervention aiming at reducing physical exertion and musculoskeletal pain among childcare workers (the TOY-project): study protocol for a wait-list cluster-randomized controlled trial. Trials 2018; 19:411. [PMID: 30064464 PMCID: PMC6069746 DOI: 10.1186/s13063-018-2788-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Accepted: 07/05/2018] [Indexed: 12/03/2022] Open
Abstract
Background The prevalence of musculoskeletal pain (MSP) is persistently high throughout the world. Work-related factors such as high physical workload (lifting, bending and twisting of the back) are considered to be among the main causes of MSP. Work in childcare includes the need to lift, carry, and support children in a range of activities, requiring several demanding postures and movements, such as bending forward and twisting of the back and sitting on the floor. Participatory ergonomics may represent a solution for decreasing the physical workload to reduce MSP. We present the protocol of a study aiming to evaluate the effect and process of a participatory ergonomics intervention designed to reduce physical exertion during work and MSP (including MSP interfering with work) among childcare workers. Methods/design This study will use a two-arm cluster-randomized design employing a wait-list control, with childcare institutions forming the clusters. Three workshops will be conducted during the 4-month intervention period. Participants will identify risk factors for strenuous work and MSP, develop solutions for reducing the identified risk factors, and implement them in their team. An ergonomic consultant will guide the process. The data collection will consist of questionnaires and objective measures of heart rate and physical activity, observations of physical workload, and information on sickness absence based on company records. Primary outcomes are physical exertion during work and MSP (including pain-related work interference) measured at 4 months. Secondary outcomes measured at 4 months are sickness absence due to MSP; objectively measured occupational physical activity and heart rate; and self-reported self-efficacy, employee involvement, and need for recovery. Alongside the trial, a process evaluation and an economic evaluation will be conducted. Discussion The study will evaluate the effect and process of a participatory ergonomics intervention to reduce physical exertion at work and MSP among childcare workers. By performing a cluster-randomized controlled trial with an effect evaluation based on both objective and self-reported measures with the addition of a process evaluation and economic evaluation, this study will contribute to the evidence for prevention of MSP among a less studied occupational group. Results are expected in 2018–2019. Trial registration ISRCTN, ISRCTN10928313. Registered on 11 January 2017. Electronic supplementary material The online version of this article (10.1186/s13063-018-2788-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
| | - Peter Rasmus Hendriksen
- National Research Centre for the Working Environment, Lersø Parkallé 105, 2100, Copenhagen, Denmark
| | - Malene Jagd Svendsen
- National Research Centre for the Working Environment, Lersø Parkallé 105, 2100, Copenhagen, Denmark
| | - Dorte Ekner
- National Research Centre for the Working Environment, Lersø Parkallé 105, 2100, Copenhagen, Denmark
| | - Klaus Hansen
- National Research Centre for the Working Environment, Lersø Parkallé 105, 2100, Copenhagen, Denmark
| | - Ole Henning Sørensen
- Center for Industrial Production, Aalborg University Copenhagen, A. C. Meyers Vænge 15, 2450, Copenhagen, Denmark
| | - Susanne Wulff Svendsen
- Danish Ramazzini Centre, Department of Occupational Medicine, Regional Hospital West Jutland-University Research Clinic, Herning, Denmark
| | - Allard J van der Beek
- Department of Public and Occupational Health, Amsterdam Public Health Research Institute, VU University Medical Center, Van der Boechorststraat 7, 1081 BT, Amsterdam, The Netherlands
| | - Andreas Holtermann
- National Research Centre for the Working Environment, Lersø Parkallé 105, 2100, Copenhagen, Denmark.,Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Campusvej 55, 5230, Odense M, Denmark
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Does the Temporal Asymmetry of Short-Term Heart Rate Variability Change during Regular Walking? A Pilot Study of Healthy Young Subjects. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2018; 2018:3543048. [PMID: 29853984 PMCID: PMC5952585 DOI: 10.1155/2018/3543048] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 02/21/2018] [Accepted: 03/21/2018] [Indexed: 11/30/2022]
Abstract
The acceleration and deceleration patterns in heartbeat fluctuations distribute asymmetrically, which is known as heart rate asymmetry (HRA). It is hypothesized that HRA reflects the balancing regulation of the sympathetic and parasympathetic nervous systems. This study was designed to examine whether altered autonomic balance during exercise can lead to HRA changes. Sixteen healthy college students were enrolled, and each student undertook two 5-min ECG measurements: one in a resting seated position and another while walking on a treadmill at a regular speed of 5 km/h. The two measurements were conducted in a randomized order, and a 30-min rest was required between them. RR interval time series were extracted from the 5-min ECG data, and HRA (short-term) was estimated using four established metrics, that is, Porta's index (PI), Guzik's index (GI), slope index (SI), and area index (AI), from both raw RR interval time series and the time series after wavelet detrending that removes the low-frequency component of <~0.03 Hz. Our pilot data showed a reduced PI but unchanged GI, SI, and AI during walking compared to resting seated position based on the raw data. Based on the wavelet-detrended data, reduced PI, SI, and AI were observed while GI still showed no significant changes. The reduced PI during walking based on both raw and detrended data which suggests less short-term HRA may underline the belief that vagal tone is withdrawn during low-intensity exercise. GI may not be sensitive to short-term HRA. The reduced SI and AI based on detrended data suggest that they may capture both short- and long-term HRA features and that the expected change in short-term HRA is amplified after removing the trend that is supposed to link to long-term component. Further studies with more subjects and longer measurements are warranted to validate our observations and to examine these additional hypotheses.
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Lan KC, Raknim P, Kao WF, Huang JH. Toward Hypertension Prediction Based on PPG-Derived HRV Signals: a Feasibility Study. J Med Syst 2018; 42:103. [DOI: 10.1007/s10916-018-0942-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Accepted: 03/15/2018] [Indexed: 10/17/2022]
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Parak J, Tarniceriu A, Renevey P, Bertschi M, Delgado-Gonzalo R, Korhonen I. Evaluation of the beat-to-beat detection accuracy of PulseOn wearable optical heart rate monitor. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2018; 2015:8099-102. [PMID: 26738173 DOI: 10.1109/embc.2015.7320273] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Heart rate variability (HRV) provides significant information about the health status of an individual. Optical heart rate monitoring is a comfortable alternative to ECG based heart rate monitoring. However, most available optical heart rate monitoring devices do not supply beat-to-beat detection accuracy required by proper HRV analysis. We evaluate the beat-to-beat detection accuracy of a recent wrist-worn optical heart rate monitoring device, PulseOn (PO). Ten subjects (8 male and 2 female; 35.9±10.3 years old) participated in the study. HRV was recorded with PO and Firstbeat Bodyguard 2 (BG2) device, which was used as an ECG based reference. HRV was recorded during sleep. As compared to BG2, PO detected on average 99.57% of the heartbeats (0.43% of beats missed) and had 0.72% extra beat detection rate, with 5.94 ms mean absolute error (MAE) in beat-to-beat intervals (RRI) as compared to the ECG based RRI BG2. Mean RMSSD difference between PO and BG2 derived HRV was 3.1 ms. Therefore, PO provides an accurate method for long term HRV monitoring during sleep.
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Coenen P, Korshøj M, Hallman DM, Huysmans MA, van der Beek AJ, Straker LM, Holtermann A. Differences in heart rate reserve of similar physical activities during work and in leisure time – A study among Danish blue-collar workers. Physiol Behav 2018; 186:45-51. [DOI: 10.1016/j.physbeh.2018.01.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 12/27/2017] [Accepted: 01/12/2018] [Indexed: 11/16/2022]
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Hulsegge G, Gupta N, Proper KI, van Lobenstein N, IJzelenberg W, Hallman DM, Holtermann A, van der Beek AJ. Shift work is associated with reduced heart rate variability among men but not women. Int J Cardiol 2018; 258:109-114. [PMID: 29433969 DOI: 10.1016/j.ijcard.2018.01.089] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 01/15/2018] [Accepted: 01/19/2018] [Indexed: 11/19/2022]
Abstract
BACKGROUND Imbalance in the autonomic nervous system due to a disrupted circadian rhythm may be a cause of shift work-related cardiovascular diseases. OBJECTIVE We aimed to determine the association between shift work and cardiac autonomic activity in blue-collar workers. METHODS The study included 665 blue-collar workers aged 18-68 years in different occupations from two Danish cohort studies. Time and frequency domain parameters of heart rate variability (HRV) were measured during sleep using the Actiheart monitor, and used as markers of cardiac autonomic function. Multiple linear regression analyses were used to investigate differences in HRV between day and shift workers. RESULTS Shift workers had no significantly different HRV parameters than day workers, except for a lower VLF (B: 0.21; 95% CI: -0.36-0.05). The lower VLF was only present among non-night shift workers (p < 0.05) and not among night shift workers (p > 0.05). Results differed significantly by gender (p for interaction < 0.10): among men, shift work was negatively associated with RMSSD (B: -7.83; 95% CI: -14.28-1.38), SDNN (B: -7.0; 95% CI: -12.27-1.78), VLF (B: -0.27; 95% CI: -0.46-0.09) and Total Power (B: -0.61; 95% CI: -1.20-0.03), while among women, shift work was only associated with the LF/HF ratio (B: -0.29; 95% CI: -0.54-0.03). CONCLUSION Shift work was particularly associated with lower HRV during sleep among men. This indicates that shift work causes imbalance in the autonomic nervous system among men, which might increase their risk of cardiovascular diseases.
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Affiliation(s)
- Gerben Hulsegge
- Department of Public and Occupational Health, Amsterdam Public Health Research Institute, VU University Medical Center, Van der Boechorststraat 7, 1081 BT Amsterdam, The Netherlands.
| | - Nidhi Gupta
- National Research Centre for the Working Environment, Lersø Parkallé 105, 2100 Copenhagen, Denmark
| | - Karin I Proper
- Centre for Nutrition, Prevention and Health Services, National Institute for Public Health and the Environment, Antonie van Leeuwenhoeklaan 9, 3721 MA Bilthoven, The Netherlands
| | - Natasja van Lobenstein
- Department of Public and Occupational Health, Amsterdam Public Health Research Institute, VU University Medical Center, Van der Boechorststraat 7, 1081 BT Amsterdam, The Netherlands
| | - Wilhelmina IJzelenberg
- Department of Health Sciences, Faculty of Earth & Life Sciences, VU University Amsterdam, Amsterdam Public Health Research Institute, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands
| | - David M Hallman
- Department of Occupational and Public Health Sciences, Centre for Musculoskeletal Research, University of Gävle, Kungsbäcksvägen 47, 801 76 Gävle, Sweden
| | - Andreas Holtermann
- National Research Centre for the Working Environment, Lersø Parkallé 105, 2100 Copenhagen, Denmark; Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Campusvej 55, 5230 Odense, Denmark
| | - Allard J van der Beek
- Department of Public and Occupational Health, Amsterdam Public Health Research Institute, VU University Medical Center, Van der Boechorststraat 7, 1081 BT Amsterdam, The Netherlands
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Different autonomic responses to occupational and leisure time physical activities among blue-collar workers. Int Arch Occup Environ Health 2017; 91:293-304. [PMID: 29177943 PMCID: PMC5845059 DOI: 10.1007/s00420-017-1279-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Accepted: 11/15/2017] [Indexed: 12/19/2022]
Abstract
Purpose The differential effect of occupational and leisure time physical activity on cardiovascular health is termed the physical activity health paradox. Cardiac autonomic modulation could bring insights about the underlying mechanism behind this differential effect. The aim was to compare heart rate variability (HRV) during different activities (sitting, standing and moving) at work and leisure among blue-collar workers. Methods One hundred thirty-eight workers from the NOMAD cohort were included. Data from physical activity and HRV were obtained for 3–4 days using tri-axial accelerometers (Actigraph GT3X+) and a heart rate monitor (Actiheart). HRV indices were determined during sitting, standing and moving both at work and leisure. Linear mixed-models with two fixed factors (activities and domains) were applied to investigate differences in HRV indices adjusting for individual and occupational factors. Results The results showed significant effects of domain (p < 0.01), physical activity type (p < 0.01) and interaction between domain and activity type (p < 0.01) on HRV indices. Mean heart rate (IBI) and parasympathetic measures of HRV (RMSSD and HF) were lower for sitting (p < 0.01) and higher for moving (p < 0.01) during work compared with leisure, while no difference between domains was found for standing (p > 0.05). Sympathovagal balance (LF/HF) was higher during work for sitting and moving (p < 0.01), but showed no difference for standing (p = 0.62). Conclusions Differences in cardiac autonomic modulation between work and leisure were found, indicating sympathetic predominance during work and parasympathetic predominance during leisure for sitting. Autonomic responses can be part of the mechanism that explains the differential effect of occupational and leisure time physical activity on health.
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Entropy Analysis of Short-Term Heartbeat Interval Time Series during Regular Walking. ENTROPY 2017. [DOI: 10.3390/e19100568] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Hallman DM, Birk Jørgensen M, Holtermann A. On the health paradox of occupational and leisure-time physical activity using objective measurements: Effects on autonomic imbalance. PLoS One 2017; 12:e0177042. [PMID: 28472190 PMCID: PMC5417644 DOI: 10.1371/journal.pone.0177042] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Accepted: 04/23/2017] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE Leisure-time physical activity (LTPA) has considerable benefits for cardiovascular health and longevity, while occupational physical activity (OPA) is associated with an elevated cardiovascular risk. This "health paradox" may be explained by different effects on the autonomic nervous system from OPA and LTPA. Thus, we aimed to investigate whether objectively measured OPA and LTPA are differentially associated with autonomic regulation among workers. METHODS The study comprised 514 blue-collar workers from the Danish cohort DPHACTO. Physical activity (i.e. walking, climbing stairs, running and cycling) was assessed objectively using accelerometers worn on the thigh, hip and trunk over multiple working days. During this period, a heart rate monitor was used to sample heart period intervals from the ECG signal. Heart rate and heart rate variability (HRV) indices were analyzed during nocturnal sleep as markers of autonomic regulation. Multiple regression analysis was used to determine the main effects of OPA and LTPA and their interaction on heart rate and HRV, adjusting for multiple confounders. RESULTS Statistically significant interaction was found between OPA and LTPA on heart rate (adjusted p<0.0001) and HRV indices in time (rMSSD, adjusted p = 0.004) and frequency-domains (HF, adjusted p = 0.022; LF, adjusted p = 0.033). The beneficial effect of LTPA on nocturnal heart rate and HRV clearly diminished with higher levels of OPA, and high levels of both OPA and LTPA had a detrimental effect. CONCLUSION We found contrasting associations for objectively measured OPA and LTPA with heart rate and HRV during sleep. Differential effects of OPA and LTPA on autonomic regulation may contribute to the physical activity health paradox.
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Affiliation(s)
- David M. Hallman
- Centre for Musculoskeletal Research, Department of Occupational and Public Health Sciences, University of Gävle, Gävle, Sweden
- * E-mail:
| | | | - Andreas Holtermann
- National Research Centre for the Working Environment, Copenhagen, Denmark
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Koch M, Lunde LK, Gjulem T, Knardahl S, Veiersted KB. Validity of Questionnaire and Representativeness of Objective Methods for Measurements of Mechanical Exposures in Construction and Health Care Work. PLoS One 2016; 11:e0162881. [PMID: 27649499 PMCID: PMC5029916 DOI: 10.1371/journal.pone.0162881] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Accepted: 08/30/2016] [Indexed: 11/24/2022] Open
Abstract
Objectives To determine the criterion validity of a questionnaire on physical exposures compared to objective measurements at construction and health care sites and to examine exposure variation over several working days. Methods Five hundred ninety-four construction and health care workers answered a baseline questionnaire. The daily activities (standing, moving, sitting, number of steps), postures (inclination of the arm and the trunk), and relative heart rate of 125 participants were recorded continuously over 3–4 working days. At the end of the first measurement day, the participants answered a second questionnaire (workday questionnaire). Results All objective activity measurements had significant correlations to their respective questions. Among health care workers, there were no correlations between postures and relative heart rate and the baseline questionnaire. The questionnaires overestimated the exposure durations. The highest explained variance in the adjusted models with self-reported variables were found for objectively measured sitting (R2 = 0.559) and arm inclination > 60° (R2 = 0.420). Objective measurements over several days showed a higher reliability compared to single day measurements. Conclusions Questionnaires cannot provide an accurate description of mechanical exposures. Objective measurements over several days are recommended in occupations with varying tasks.
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Affiliation(s)
- Markus Koch
- Department of Work Psychology and Physiology, National Institute of Occupational Health, Oslo, Norway
- * E-mail:
| | - Lars-Kristian Lunde
- Department of Work Psychology and Physiology, National Institute of Occupational Health, Oslo, Norway
| | - Tonje Gjulem
- Department of Work Psychology and Physiology, National Institute of Occupational Health, Oslo, Norway
- Oslo University Hospital, Oslo, Norway
| | - Stein Knardahl
- Department of Work Psychology and Physiology, National Institute of Occupational Health, Oslo, Norway
| | - Kaj Bo Veiersted
- Department of Work Psychology and Physiology, National Institute of Occupational Health, Oslo, Norway
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Korshøj M, Lidegaard M, Krustrup P, Jørgensen MB, Søgaard K, Holtermann A. Long Term Effects on Risk Factors for Cardiovascular Disease after 12-Months of Aerobic Exercise Intervention - A Worksite RCT among Cleaners. PLoS One 2016; 11:e0158547. [PMID: 27513932 PMCID: PMC4981369 DOI: 10.1371/journal.pone.0158547] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 06/18/2016] [Indexed: 01/09/2023] Open
Abstract
Objectives Occupational groups exposed to high occupational physical activity have an increased risk for cardiovascular disease (CVD). This may be explained by the high relative aerobic workload. Enhanced cardiorespiratory fitness reduces the relative aerobic workload. Thus, the aim was to evaluate the 12-months effects of worksite aerobic exercise on risk factors for CVD among cleaners. Methods One hundred and sixteen cleaners aged 18–65 years were randomized to a group performing aerobic exercise and a reference group receiving lectures. Outcomes were collected at baseline and after 12-months. A repeated measures 2×2 multi-adjusted mixed-model design was applied to compare the between-group differences using intention-to-treat analysis. Results Between-group differences (p<0.05) were found favouring the aerobic exercise group: cardiorespiratory fitness 2.15 (SE 1.03) mlO2/min/kg, aerobic workload -2.15 (SE 1.06) %HRR, resting HR -5.31 (SE 1.61) beats/min, high sensitive C-reactive protein -0.65 (SE 0.24) μg/ml. The blood pressure was unaltered. Stratified analyses on relative aerobic workload at baseline revealed that those with relative aerobic workloads ≥30% of HRR seems to impose a notable adverse effect on resting and ambulatory blood pressure. Conclusion This long-term worksite aerobic exercise intervention among cleaners led to several beneficial effects, but also potential adverse effects among those with high relative aerobic workloads. Trial Registration Controlled-Trials.com ISRCTN86682076
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Affiliation(s)
- Mette Korshøj
- National Research Centre for the Working Environment, Lersø Parkallé 105, 2100, Copenhagen Ø, Denmark
- Department of Nutrition, Exercise and Sports, Copenhagen Centre for Team Sport and Health, University of Copenhagen, Nørre Allé 51, 2200, Copenhagen N, Denmark
- * E-mail:
| | - Mark Lidegaard
- National Research Centre for the Working Environment, Lersø Parkallé 105, 2100, Copenhagen Ø, Denmark
| | - Peter Krustrup
- Department of Nutrition, Exercise and Sports, Copenhagen Centre for Team Sport and Health, University of Copenhagen, Nørre Allé 51, 2200, Copenhagen N, Denmark
- Sport and Health Sciences, College of Life and Environmental Sciences, St. Luke's Campus, University of Exeter, Exeter, United Kingdom
| | - Marie Birk Jørgensen
- National Research Centre for the Working Environment, Lersø Parkallé 105, 2100, Copenhagen Ø, Denmark
| | - Karen Søgaard
- Institute of Sports Science and Clinical Biomechanics, University of Southern Denmark, Campusvej 55, 5230, Odense M, Denmark
| | - Andreas Holtermann
- National Research Centre for the Working Environment, Lersø Parkallé 105, 2100, Copenhagen Ø, Denmark
- Institute of Sports Science and Clinical Biomechanics, University of Southern Denmark, Campusvej 55, 5230, Odense M, Denmark
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Prolonged Sitting is Associated with Attenuated Heart Rate Variability during Sleep in Blue-Collar Workers. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2015; 12:14811-27. [PMID: 26610534 PMCID: PMC4661681 DOI: 10.3390/ijerph121114811] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 11/02/2015] [Accepted: 11/17/2015] [Indexed: 11/17/2022]
Abstract
Prolonged sitting is associated with increased risk for cardiovascular diseases and mortality. However, research into the physiological determinants underlying this relationship is still in its infancy. The aim of the study was to determine the extent to which occupational and leisure-time sitting are associated with nocturnal heart rate variability (HRV) in blue-collar workers. The study included 138 blue-collar workers (mean age 45.5 (SD 9.4) years). Sitting-time was measured objectively for four days using tri-axial accelerometers (Actigraph GT3X+) worn on the thigh and trunk. During the same period, a heart rate monitor (Actiheart) was used to sample R-R intervals from the electrocardiogram. Time and frequency domain indices of HRV were only derived during nighttime sleep, and used as markers of cardiac autonomic modulation. Regression analyses with multiple adjustments (age, gender, body mass index, smoking, job-seniority, physical work-load, influence at work, and moderate-to-vigorous physical activity) were used to investigate the association between sitting time and nocturnal HRV. We found that occupational sitting-time was negatively associated (p < 0.05) with time and frequency domain HRV indices. Sitting-time explained up to 6% of the variance in HRV, independent of the covariates. Leisure-time sitting was not significantly associated with any HRV indices (p > 0.05). In conclusion, objectively measured occupational sitting-time was associated with reduced nocturnal HRV in blue-collar workers. This indicates an attenuated cardiac autonomic regulation with increasing sitting-time at work regardless of moderate-to-vigorous physical activity. The implications of this association for cardiovascular disease risk warrant further investigation via long-term prospective studies and intervention studies.
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Smart ECG Monitoring Patch with Built-in R-Peak Detection for Long-Term HRV Analysis. Ann Biomed Eng 2015; 44:2292-301. [PMID: 26558395 DOI: 10.1007/s10439-015-1502-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Accepted: 11/05/2015] [Indexed: 10/22/2022]
Abstract
Since heart rate variability (HRV) analysis is widely used to evaluate the physiological status of the human body, devices specifically designed for such applications are needed. To this end, we developed a smart electrocardiography (ECG) patch. The smart patch measures ECG using three electrodes integrated into the patch, filters the measured signals to minimize noise, performs analog-to-digital conversion, and detects R-peaks. The measured raw ECG data and the interval between the detected R-peaks can be recorded to enable long-term HRV analysis. Experiments were performed to evaluate the performance of the built-in R-wave detection, robustness of the device under motion, and applicability to the evaluation of mental stress. The R-peak detection results obtained with the device exhibited a sensitivity of 99.29%, a positive predictive value of 100.00%, and an error of 0.71%. The device also exhibited less motional noise than conventional ECG recording, being stable up to a walking speed of 5 km/h. When applied to mental stress analysis, the device evaluated the variation in HRV parameters in the same way as a normal ECG, with very little difference. This device can help users better understand their state of health and provide physicians with more reliable data for objective diagnosis.
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Korshøj M, Clays E, Lidegaard M, Skotte JH, Holtermann A, Krustrup P, Søgaard K. Is aerobic workload positively related to ambulatory blood pressure? A cross-sectional field study among cleaners. Eur J Appl Physiol 2015; 116:145-52. [PMID: 26363639 DOI: 10.1007/s00421-015-3259-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 09/04/2015] [Indexed: 10/23/2022]
Abstract
PURPOSE Cardiovascular disease is prevalent among workers with high levels of occupational physical activity. The increased risk may be due to a high relative aerobic workload, possibly leading to increased blood pressure. However, studies investigating the relation between relative aerobic workload and ambulatory blood pressure (ABP) are lacking. The aim was to explore the relationship between objectively measured relative aerobic workload and ABP. METHODS A total of 116 cleaners aged 18-65 years were included after informed consent was obtained. A portable device (Spacelabs 90217) was mounted for 24-h measurements of ABP, and an Actiheart was mounted for 24-h heart rate measurements to calculate relative aerobic workload as percentage of relative heart rate reserve. A repeated-measure multi-adjusted mixed model was applied for analysis. RESULTS A fully adjusted mixed model of measurements throughout the day showed significant positive relations (p < 0.001): a 1% increase in mean relative aerobic workload was associated with an increase of 0.42 ± 0.05 mmHg (95% CI 0.32-0.52 mmHg) in systolic ABP and 0.30 ± 0.04 mmHg (95% CI 0.22-0.38 mmHg) in diastolic ABP. Correlations between relative aerobic workload and ABP were significant. CONCLUSIONS Because workers may have an elevated relative aerobic workload for several hours each working day, this relationship may elucidate a mechanism behind the increased risk for cardiovascular disease among workers exposed to high levels of occupational physical activity.
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Affiliation(s)
- Mette Korshøj
- The National Research Centre for the Working Environment, Lersø Parkallé 105, 2100, Copenhagen Ø, Denmark. .,Department of Nutrition, Exercise and Sports, Copenhagen Centre for Team Sport and Health, University of Copenhagen, Nørre Allé 51, 2200, Copenhagen N, Denmark.
| | - Els Clays
- Department of Public Health, Ghent University, De Pintelaan 185, 9000, Ghent, Belgium
| | - Mark Lidegaard
- The National Research Centre for the Working Environment, Lersø Parkallé 105, 2100, Copenhagen Ø, Denmark
| | - Jørgen H Skotte
- The National Research Centre for the Working Environment, Lersø Parkallé 105, 2100, Copenhagen Ø, Denmark
| | - Andreas Holtermann
- The National Research Centre for the Working Environment, Lersø Parkallé 105, 2100, Copenhagen Ø, Denmark.,Institute of Sports Science and Clinical Biomechanics, University of Southern Denmark, Campusvej 55, 5230, Odense M, Denmark
| | - Peter Krustrup
- Department of Nutrition, Exercise and Sports, Copenhagen Centre for Team Sport and Health, University of Copenhagen, Nørre Allé 51, 2200, Copenhagen N, Denmark.,Sport and Health Sciences, College of Life and Environmental Sciences, University of Exeter, St. Luke's Campus, Exeter, UK
| | - Karen Søgaard
- Institute of Sports Science and Clinical Biomechanics, University of Southern Denmark, Campusvej 55, 5230, Odense M, Denmark
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Hillebrand S, Swenne CA, Gast KB, Maan AC, le Cessie S, Jukema JW, Rosendaal FR, den Heijer M, de Mutsert R. The role of insulin resistance in the association between body fat and autonomic function. Nutr Metab Cardiovasc Dis 2015; 25:93-99. [PMID: 25171899 DOI: 10.1016/j.numecd.2014.07.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Revised: 07/21/2014] [Accepted: 07/22/2014] [Indexed: 10/25/2022]
Abstract
BACKGROUND AND AIM Excess body fat is associated with altered autonomic function. We investigated whether this association is mediated by insulin resistance. METHODS AND RESULTS Cross-sectional analysis of a subgroup of the Netherlands Epidemiology of Obesity study with measurements of autonomic function (heart rate variability calculated as mean interbeat interval, standard deviation of all normal intervals (SDNN), low frequency (LF) power and high frequency (HF) power). We measured BMI(kg/m²), total body fat(%) and waist circumference(cm), and calculated the HOMA-index of insulin resistance (HOMA-IR). We examined the association between body fat and heart rate variability with multivariate linear regression analysis. To investigate whether the association was mediated by insulin resistance, we additionally adjusted for HOMA-IR. After exclusion of participants with glucose lowering medication (n = 19), 466 participants were included. Per SD of BMI, the difference in SDNN was -2.7% (95%CI: -5.5, 0.1) in the multivariate model. Additional adjustment for HOMA-IR attenuated this association to -1.2% (95%CI: -4.2, 1.7), suggesting that 55% of the association between BMI and SDNN was mediated by HOMA-IR. All measures of body fat were associated with mean interbeat interval, SDNN and LF power. Depending on the parameter of body fat or heart rate variability, 29-81% of the association was mediated by HOMA-IR. CONCLUSION In this cross-sectional study, body fat was associated with heart rate variability. This association may at least partially be mediated by insulin resistance. Future studies should investigate whether a reduction in obesity and insulin resistance may prevent the adverse cardiovascular consequences of altered autonomic function.
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Affiliation(s)
- S Hillebrand
- Department of Clinical Epidemiology, Leiden University Medical Centre, PO Box 9600, 2300 RC Leiden, The Netherlands.
| | - C A Swenne
- Department of Cardiology, Leiden University Medical Centre, PO Box 9600, 2300 RC Leiden, The Netherlands
| | - K B Gast
- Department of Clinical Epidemiology, Leiden University Medical Centre, PO Box 9600, 2300 RC Leiden, The Netherlands; Department of Internal Medicine, Leiden University Medical Centre, PO Box 9600, 2300 RC Leiden, The Netherlands
| | - A C Maan
- Department of Cardiology, Leiden University Medical Centre, PO Box 9600, 2300 RC Leiden, The Netherlands
| | - S le Cessie
- Department of Clinical Epidemiology, Leiden University Medical Centre, PO Box 9600, 2300 RC Leiden, The Netherlands; Department of Medical Statistics, Leiden University Medical Centre, PO Box 9600, 2300 RC Leiden, The Netherlands
| | - J W Jukema
- Department of Cardiology, Leiden University Medical Centre, PO Box 9600, 2300 RC Leiden, The Netherlands; Interuniversity Cardiology Institute of the Netherlands, PO Box 19258, 3501 DG Utrecht, The Netherlands
| | - F R Rosendaal
- Department of Clinical Epidemiology, Leiden University Medical Centre, PO Box 9600, 2300 RC Leiden, The Netherlands; Department of Thrombosis and Hemostasis, Leiden University Medical Centre, PO Box 9600, 2300 RC Leiden, The Netherlands
| | - M den Heijer
- Department of Clinical Epidemiology, Leiden University Medical Centre, PO Box 9600, 2300 RC Leiden, The Netherlands; Department of Internal Medicine, VU Medical Centre, PO Box 7057, 1007 MB Amsterdam, The Netherlands
| | - R de Mutsert
- Department of Clinical Epidemiology, Leiden University Medical Centre, PO Box 9600, 2300 RC Leiden, The Netherlands
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Lunde LK, Koch M, Knardahl S, Wærsted M, Mathiassen SE, Forsman M, Holtermann A, Veiersted KB. Musculoskeletal health and work ability in physically demanding occupations: study protocol for a prospective field study on construction and health care workers. BMC Public Health 2014; 14:1075. [PMID: 25318646 PMCID: PMC4203897 DOI: 10.1186/1471-2458-14-1075] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Accepted: 10/10/2014] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND Musculoskeletal disorders have a profound impact on individual health, sickness absence and early retirement, particularly in physically demanding occupations. Demographics are changing in the developed countries, towards increasing proportions of senior workers. These senior workers may have particular difficulties coping with physically demanding occupations while maintaining good health. Previous studies investigating the relationship between physical work demands and musculoskeletal disorders are mainly based on self-reported exposures and lack a prospective design. The aim of this paper is to describe the background and methods and discuss challenges for a field study examining physical demands in construction and health care work and their prospective associations with musculoskeletal disorders, work ability and sickness absence. METHODS AND DESIGN This protocol describes a prospective cohort study on 1200 construction and health care workers. Participants will answer a baseline questionnaire concerning musculoskeletal complaints, general health, psychosocial and organizational factors at work, work demands, work ability and physical activity during leisure. A shorter questionnaire will be answered every 6th months for a total of two years, together with continuous sickness absence monitoring during this period. Analysis will prospectively consider associations between self-reported physical demands and musculoskeletal disorders, work ability and sickness absence. To obtain objective data on physical exposures, technical measurements will be collected from two subgroups of N = 300 (Group A) and N = 160 (Group B) during work and leisure. Both group A and B will be given a physical health examination, be tested for physical capacity and physical activity will be measured for four days. Additionally, muscle activity, ground reaction force, body positions and physical activity will be examined during one workday for Group B. Analysis of associations between objectively measured exposure data and the outcomes described above will be done separately for these subpopulations. DISCUSSION The field study will at baseline produce objectively measured data on physical demands in the construction and health care occupations. In combination with clinical measurements and questionnaire data during follow-up, this will provide a solid foundation to prospectively investigate relationships between physical demands at work and development of musculoskeletal disorders, work ability and sickness absence.
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Affiliation(s)
| | | | | | | | | | | | | | - Kaj Bo Veiersted
- National Institute of Occupational Health, Gydas vei 8, 0336 Oslo, Norway.
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Skotte JH, Kristiansen J. Heart rate variability analysis using robust period detection. Biomed Eng Online 2014; 13:138. [PMID: 25248280 PMCID: PMC4228159 DOI: 10.1186/1475-925x-13-138] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Accepted: 09/19/2014] [Indexed: 01/24/2023] Open
Abstract
Objective Heart rate variability (HRV) analysis, which is an important tool for activity assessment of the cardiac autonomic nervous system, very often includes the estimation of power spectra for series of interbeat intervals (IBI). Ectopic beats and artifacts have a destructive effect on the standard methods (Fourier transform, FFT) for frequency analysis. This study investigates an alternative method for calculation of the periodogram using a robust period detection (RPD). Method Error free IBI series of 5 minutes for 221 subjects during one day were artificially distorted by randomly changing IBI values by ±15-40%. The low to high frequency rate (LF/HF) were calculated from periodograms estimated by the FFT, RPD and Lomb (LSP) methods for both error free and distorted series and for series with removed beats. Log transformed LF/HF values for series with distorted/removed beats were compared to undistorted values by linear regression. Results For series with 10% of distorted IBI values the regression analysis between distorted and undistorted series showed a goodness of fit, coefficient and intercept of 0.98, 0.94 and 0.02, respectively. In comparison, the values of these parameters were (0.34, 0.46, -1.61) and (0.28, 0.42,-1.32) for the FFT and LSP methods, respectively. Similarly, the comparison between series with removed and undistorted beats yielded goodness of fit, coefficient and intercept of (0.98, 0.96, -0.01), (0.93, 0.78, -0.02) and (0.98, 0.95, 0.19) for RPD, FFT and LSP, respectively. Conclusion The RPD method demonstrated superior performance compared to the FFT and LSP method by estimation of power spectral characteristics for HRV analysis. Electronic supplementary material The online version of this article (doi:10.1186/1475-925X-13-138) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Jørgen H Skotte
- National Research Centre for the Working Environment, Lersø Parkallé 105, DK-2100 Copenhagen, Denmark.
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Gupta N, Jensen BS, Søgaard K, Carneiro IG, Christiansen CS, Hanisch C, Holtermann A. Face validity of the single work ability item: comparison with objectively measured heart rate reserve over several days. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2014; 11:5333-48. [PMID: 24840350 PMCID: PMC4053900 DOI: 10.3390/ijerph110505333] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Revised: 04/14/2014] [Accepted: 05/08/2014] [Indexed: 11/16/2022]
Abstract
Purpose: The purpose of this study was to investigate the face validity of the self-reported single item work ability with objectively measured heart rate reserve (%HRR) among blue-collar workers. Methods: We utilized data from 127 blue-collar workers (Female = 53; Male = 74) aged 18–65 years from the cross-sectional “New method for Objective Measurements of physical Activity in Daily living (NOMAD)” study. The workers reported their single item work ability and completed an aerobic capacity cycling test and objective measurements of heart rate reserve monitored with Actiheart for 3–4 days with a total of 5,810 h, including 2,640 working hours. Results: A significant moderate correlation between work ability and %HRR was observed among males (R = −0.33, P = 0.005), but not among females (R = 0.11, P = 0.431). In a gender-stratified multi-adjusted logistic regression analysis, males with high %HRR were more likely to report a reduced work ability compared to males with low %HRR [OR = 4.75, 95% confidence interval (95% CI) = 1.31 to 17.25]. However, this association was not found among females (OR = 0.26, 95% CI 0.03 to 2.16), and a significant interaction between work ability, %HRR and gender was observed (P = 0.03). Conclusions: The observed association between work ability and objectively measured %HRR over several days among male blue-collar workers supports the face validity of the single work ability item. It is a useful and valid measure of the relation between physical work demands and resources among male blue-collar workers. The contrasting association among females needs to be further investigated.
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Affiliation(s)
- Nidhi Gupta
- National Research Centre for the Working Environment, 2100, Copenhagen, Denmark.
| | - Bjørn Søvsø Jensen
- National Research Centre for the Working Environment, 2100, Copenhagen, Denmark.
| | - Karen Søgaard
- Institute of Sports Science and Clinical Biomechanics, University of Southern Denmark, 5230, Odense M, Denmark.
| | | | | | - Christiana Hanisch
- Federal Institute for Occupational Safety and Health (BAuA) Nöldnerstr, 40-42, D-10317, Berlin, Germany.
| | - Andreas Holtermann
- National Research Centre for the Working Environment, 2100, Copenhagen, Denmark.
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Lower resting and total energy expenditure in postmenopausal compared with premenopausal women matched for abdominal obesity. J Nutr Sci 2014; 3:e3. [PMID: 25191611 PMCID: PMC4153012 DOI: 10.1017/jns.2013.38] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 11/15/2013] [Accepted: 12/02/2013] [Indexed: 02/05/2023] Open
Abstract
The menopause is accompanied by increased risk of obesity, altered body fat distribution and decreased skeletal muscle mass. The resulting decrease in RMR should be accompanied by a compensatory change in energy balance to avoid weight gain. We aimed to investigate habitual energy intake and expenditure in pre- and postmenopausal women matched for abdominal obesity. We recruited fifty-one healthy Caucasian women, BMI > 18·5 and <35 kg/m(2), aged 35-45 years (premenopausal, n 26) and 55-65 years (postmenopausal, n 25). Energy intake was measured using 3 d diet diaries and dietary fat quality assessed using adipose tissue fatty acid biomarkers. RMR was measured using indirect calorimetry, and total energy expenditure (TEE) and activity energy expenditure using a combined accelerometer and heart rate monitor. Postmenopausal women had lower RMR and TEE and spent significantly less time undertaking moderate exercise than premenopausal women. Postmenopausal women had a tendency for a lower energy intake, and a similar macronutrient intake but a significantly lower adipose tissue n-6:n-3 ratio (24·6 (se 1·6) v. 37·7 (se 3·1); P < 0·001). The main lifestyle determinant of bone mineral density (which was significantly lower in postmenopausal women) was TEE for premenopausal women, and dietary n-6:n-3 ratio for postmenopausal women. The present results suggest that weight maintenance is achieved in the post- compared with premenopausal status through a combination of reduced energy intake and reduced TEE in a regimen that compromises micronutrient intake and has a negative impact on lean tissue mass. However, lower n-6:n-3 fatty acid intake in postmenopausal women is associated with greater bone mineral density.
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Parak J, Korhonen I. Evaluation of wearable consumer heart rate monitors based on photopletysmography. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2014; 2014:3670-3673. [PMID: 25570787 DOI: 10.1109/embc.2014.6944419] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Wearable monitoring of heart rate (HR) during physical activity and exercising allows real time control of exercise intensity and training effect. Recently, technologies based on pulse plethysmography (PPG) have become available for personal health management for consumers. However, the accuracy of these monitors is poorly known which limits their application. In this study, we evaluated accuracy of two PPG based (wrist i.e. Mio Alpha vs forearm i.e. Schosche Rhythm) commercially available HR monitors during exercise. 21 healthy volunteers (15 male and 6 female) completed an exercise protocol which included sitting, lying, walking, running, cycling, and some daily activities involving hand movements. HR estimation was compared against values from the reference electrocardiogram (ECG) signal. The heart rate estimation reliability scores for <;5% accuracy against reference were following: mio Alpha 77,83% and Scosche Rhytm 76,29%. The estimated results indicate that performance of devices depends on various parameters, including specified activity, sensor type and device placement.
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Hall WL, Hay G, Maniou Z, Seed PT, Chowienczyk PJ, Sanders TAB. Effect of low doses of long chain n-3 polyunsaturated fatty acids on sleep-time heart rate variability: a randomized, controlled trial. Int J Cardiol 2013; 168:4439-42. [PMID: 23896537 PMCID: PMC3919209 DOI: 10.1016/j.ijcard.2013.06.153] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Accepted: 06/30/2013] [Indexed: 12/19/2022]
Affiliation(s)
- Wendy L Hall
- Diabetes and Nutritional Sciences Division, King's College London, London, United Kingdom.
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Jørgensen MB, Korshøj M, Lagersted-Olsen J, Villumsen M, Mortensen OS, Skotte J, Søgaard K, Madeleine P, Thomsen BL, Holtermann A. Physical activities at work and risk of musculoskeletal pain and its consequences: protocol for a study with objective field measures among blue-collar workers. BMC Musculoskelet Disord 2013; 14:213. [PMID: 23870666 PMCID: PMC3724749 DOI: 10.1186/1471-2474-14-213] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2012] [Accepted: 07/17/2013] [Indexed: 11/10/2022] Open
Abstract
Background Among blue-collar workers, high physical work demands are generally considered to be the main cause of musculoskeletal pain and work disability. However, current available research on this topic has been criticised for using self-reported data, cross-sectional design, insufficient adjustment for potential confounders, and inadequate follow-up on the recurrent and fluctuating pattern of musculoskeletal pain. Recent technological advances have provided possibilities for objective diurnal field measurements of physical activities and frequent follow-up on musculoskeletal pain. The main aim of this paper is to describe the background, design, methods, limitations and perspectives of the Danish Physical Activity cohort with Objective measurements (DPhacto) investigating the association between objectively measured physical activities capturing work and leisure time and frequent measurements of musculoskeletal pain among blue-collar workers. Methods/design Approximately 2000 blue-collar workers are invited for the study and asked to respond to a baseline questionnaire, participate in physical tests (i.e. muscle strength, aerobic fitness, back muscle endurance and flexibility), to wear accelerometers and a heart rate monitor for four consecutive days, and finally respond to monthly text messages regarding musculoskeletal pain and quarterly questionnaires regarding the consequences of musculoskeletal pain on work activities, social activities and work ability for a one-year follow-up period. Discussion This study will provide novel information on the association between physical activities at work and musculoskeletal pain. The study will provide valid and precise documentation about the relation between physical work activities and musculoskeletal pain and its consequences among blue-collar workers.
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Affiliation(s)
- Marie Birk Jørgensen
- National Research Centre for the Working Environment, Copenhagen, Lersø Parkallé 105, 2100, Copenhagen, DK, Denmark.
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Korshøj M, Krustrup P, Jørgensen MB, Prescott E, Hansen ÅM, Kristiansen J, Skotte JH, Mortensen OS, Søgaard K, Holtermann A. Cardiorespiratory fitness, cardiovascular workload and risk factors among cleaners; a cluster randomized worksite intervention. BMC Public Health 2012; 12:645. [PMID: 22888833 PMCID: PMC3490923 DOI: 10.1186/1471-2458-12-645] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2012] [Accepted: 08/07/2012] [Indexed: 11/10/2022] Open
Abstract
Background Prevalence of cardiovascular risk factors is unevenly distributed among occupational groups. The working environment, as well as lifestyle and socioeconomic status contribute to the disparity and variation in prevalence of these risk factors. High physical work demands have been shown to increase the risk for cardiovascular disease and mortality, contrary to leisure time physical activity. High physical work demands in combination with a low cardiorespiratory fitness infer a high relative workload and an excessive risk for cardiovascular mortality. Therefore, the aim of this study is to examine whether a worksite aerobic exercise intervention will reduce the relative workload and cardiovascular risk factors by an increased cardiorespiratory fitness. Methods/design A cluster-randomized controlled trial is performed to evaluate the effect of the worksite aerobic exercise intervention on cardiorespiratory fitness and cardiovascular risk factors among cleaners. Cleaners are eligible if they are employed ≥ 20 hours/week, at one of the enrolled companies. In the randomization, strata are formed according to the manager the participant reports to. The clusters will be balanced on the following criteria: Geographical work location, gender, age and seniority. Cleaners are randomized to either I) a reference group, receiving lectures concerning healthy living, or II) an intervention group, performing worksite aerobic exercise “60 min per week”. Data collection will be conducted at baseline, four months and 12 months after baseline, at the worksite during working hours. The data collection will consist of a questionnaire-based interview, physiological testing of health and capacity-related measures, and objective diurnal measures of heart rate, physical activity and blood pressure. Primary outcome is cardiorespiratory fitness. Discussion Information is lacking about whether an improved cardiorespiratory fitness will affect the cardiovascular health, and additionally decrease the objectively measured relative workload, in a population with high physical work demands. Previous intervention studies have lacked robust objective measurements of the relative workload and physical work demands. This study will monitor the relative workload and general physical activity before, during after the intervention, and contribute to the understanding of the previously observed opposing effects on cardiovascular health and mortality from occupational and leisure time physical activity. Trial registration The study is registered as ISRCTN86682076.
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Affiliation(s)
- Mette Korshøj
- National Research Centre for the Working Environment, Lersø Parkallé 105, 2100, Copenhagen Ø, Denmark
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Samani A, Holtermann A, Søgaard K, Holtermann A, Madeleine P. Following ergonomics guidelines decreases physical and cardiovascular workload during cleaning tasks. ERGONOMICS 2012; 55:295-307. [PMID: 22409167 DOI: 10.1080/00140139.2011.640945] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
UNLABELLED The aim was to investigate the effect of ergonomics guidelines on muscular activity, postural and cardiovascular load during cleaning. Eighteen cleaners performed 10 min of cleaning tasks in two locations; three min in a laboratory and seven min in a lecture room. All participants performed the task with or without focusing on ergonomics guidelines (ergonomics/non-ergonomics session). Bipolar surface electromyography was recorded bilaterally from upper trapezius and erector spinae muscles. A tri-axial accelerometer package was mounted on the low back (L5-S1) to measure postural changes, and the cardiovascular load was estimated by electrocardiogram. Ergonomics sessions resulted in lower muscular load, a more complex pattern of muscular activity, lower range of motion and angular velocity of the trunk as well as lower cardiovascular load compared with non-ergonomics sessions (p < 0.05). The study highlighted the multiple musculoskeletal and cardiovascular benefits of following ergonomics guidelines during cleaning tasks. PRACTITIONER SUMMARY This study investigated the effects of following instructive ergonomics guidelines during cleaning tasks (daily curriculum of cleaning including mopping, sweeping, changing trash bins and cleaning of desks and blackboards). Following the ergonomics guidelines reduces the general workload and induces a more complex pattern of muscular activity. The study contributes with novel knowledge concerning ergonomics guidelines and work techniques.
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Affiliation(s)
- Afshin Samani
- Department of Health Science and Technology, Aalborg University, Fredrik Bajers Vej 7 D-3, Aalborg East, Denmark
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