Occupational Stress, Sedentary Behavior
Conditions
Brief summary
The purpose of the study is to study changes in sedentary behavior following a behavioral intervention (sit-and-stand desk, and cycloergometer)
Detailed description
Each emergency medical services dispatcher and each firefighter participates in the study for three days. A normal working day from of 12h is compared to: (i) a working day during which the participants have to get up at least 5 min/hour (sit-and-stand desk), (ii) a working day during which they can use a cycloergometer installed under the desk. Conditions will be random using Latin Square design with stratification between sequences cross-over design on occupation (EMD vs. firefighters). The heart rate variability (measured using Zephyr®), the electrodermal activity (Empatica® E4), the level of physical activity (Actigraph®) as well as the blood sugar (Freestyle®) will be measured continuously during the 12 hours of work and the night after except for Actigraph® and Freestyle® device that will be let one week. Blood and saliva samples will be collected on each working day, at the beginning and end of the day i.e. two measures for blood samples, and every three hours i.e. 5 measures for saliva sampling. Participants will have to complete a detailed questionnaire to identify the particular events (vital emergencies, etc.) that may influence the parameters measured. Participants will be asked to answer a general questionnaire once at the start of the study that will cover different aspects: * Sociodemographic, * Visual analogue scale (VAS) related to psychosocial factors : stress at home, burnout / burnout, decision latitude / autonomy at work, psychological demands at work (workload), support from the hierarchy, support from co-workers, family support, job satisfaction with regard to effort, commitment to work, addiction to work, quality of life, need for psychological support, * Eating habits. They will then have to answer a short questionnaire at the beginning and at the end of each measurement day. It will cover different aspects: * Four VAS (stress level, fatigue, anxiety, mood), * Physical activity and sedentary lifestyle (number of hours of physical activity and sitting during the last 24 hours), * Daily consumption (tobacco, alcohol, cannabis, coffee, tea).
Interventions
BEHAVIORALControl
A normal working day from of 12h
BEHAVIORALSit-and-stand desk
a working day during which the participants have to get up at least 5 min/hour
BEHAVIORALCycloergometer
a working day during which they can use a cycloergometer installed under the desk
Sponsors
University Hospital, Clermont-Ferrand
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
PREVENTION
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
* Emergency medical dispatchers, Operators of Non-Scheduled Care (OSNP), Ambulance Coordinators (COAM) or firefighters from the departmental fire and rescue operational center (CODIS). * Person able to give an informed consent to participate in research * Affiliated with a Social Security scheme. * Being able to use the sit-stand desk and the cycle ergometer
Exclusion criteria
* Non-affiliated to a health insurance, * Protected persons (minors, pregnant women, breastfeeding women, guardianship, curatorship, deprived of freedoms, safeguard of justice), * Refusal to participate. * History of PTSD. * History of psychiatric disorders.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Sedentary behavior | 12 hours of work corresponding to the control condition | Sedentary behavior measured by actimetry using Actigraph® in number of minutes per day standing/active. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Sedentary behavior | one-week (168 hours) sit-and-stand desk cycle | Sedentary behavior measured by actimetry using Actigraph® in number of minutes standing/active during one week. |
| Heart rate variability | 24 hours record corresponding to 12 hours of work and the next 12 hours of rest | The heart rate variability measured using Zephyr® |
| Electrodermal activity | 24 hours record corresponding to 12 hours of work and the next 12 hours of rest | The electrodermal activity measured using Empatica E4 |
| Stress at home | 6 am, beginning of the control day | Stress at home measured using visual analogue scale ranging from 0 (Minimum) to 100 (Maximum). Higher scores mean a worse outcome. |
| Fatigue | 6 am, beginning of the control day | Fatigue measured using visual analogue scale ranging from 0 (Minimum) to 100 (Maximum). Higher scores mean a worse outcome. |
| Anxiety | 6 am, beginning of the control day | Anxiety measured using visual analogue scale ranging from 0 (Minimum) to 100 (Maximum). Higher scores mean a worse outcome. |
| Mood | 6 pm, beginning of the control day | Mood measured using visual analogue scale ranging from 0 (Bad) to 100 (Excellent). Higher scores mean a better outcome. |
| Stress at work | 6 am, beginning of the control day | Stress at work measured using visual analogue scale ranging from 0 (Minimum) to 100 (Maximum).Higher scores mean a worse outcome. |
| Amount of physical activity | 6 am, beginning of the control day | Number of hours of physical activity during the last 24 hours |
| Intensity of physical activity | 6 am, beginning of the control day | Physical activity intensity during the last 24 hours measured using visual analogue scale ranging from 0 (Minimum) to 100 (Maximum). Higher scores mean a higher intensity. |
| Sitting time | 6 am, beginning of the control day | Number of hours sit during the last 24 hours |
| Tabacco consumption | 6 am, beginning of the control day | Number of cigarette during the last 24h |
| Tea consumption | 6 am, beginning of the control day | Number of cups of tea during the last 24h |
| Coffee consumption | 6 am, beginning of the control day | Number of cups of coffee during the last 24h |
| Sociodemographic | Once at baseline | Sociodemographic will be assessed: gender, age, marital status, children, occupation, and recent stressful event |
| Sleep quality | Once at baseline | Sleep quality measured using visual analogue scale ranging from 0 (Bad) to 100 (Excellent). Higher scores mean a better outcome. |
| Family support | Once at baseline | Family support measured using visual analogue scale ranging from 0 (Minimum) to 100 (Maximum). Higher scores mean a better outcome. |
| Burnout | Once at baseline | Burnout measured using visual analogue scale ranging from 0 (Minimum) to 100 (Maximum). Higher scores mean a worse outcome. |
| Job demand | Once at baseline | Job demand measured using visual analogue scale ranging from 0 (Minimum) to 100 (Maximum). Higher scores mean a worse outcome. |
| Job control | Once at baseline | Job control measured using visual analogue scale ranging from 0 (Minimum) to 100 (Maximum). Higher scores mean a better outcome. |
| Hierarchy support | Once at baseline | Hierarchy support measured using visual analogue scale ranging from 0 (Minimum) to 100 (Maximum). Higher scores mean a better outcome. |
| Colleagues support | Once at baseline | Colleagues support measured using visual analogue scale ranging from 0 (Minimum) to 100 (Maximum). Higher scores mean a better outcome. |
| Effort reward-imbalance | Once at baseline | Effort reward-imbalance measured using visual analogue scale ranging from 0 (Minimum) to 100 (Maximum). Higher scores mean a better outcome. |
| Medical treatment | Once at baseline | Medical treatment measured using multi-choice question "do you take long term medication?" |
| Allergy | Once at baseline | Allergy measured using multi-choice question "do you have allergy?" |
| Average physical activity | Once at baseline | Average number of hours of physical activity per week |
| Average physical activity intensity | Once at baseline | Average physical activity intensity per week |
| Average tabacco consumption | Once at baseline | Average number of cigarette per day |
| Average alcohol consumption | Once at baseline | Average number of alcohol glasses per week |
| Average cannabis consumption | Once at baseline | Average number of cannabis joint per week |
| Average tea consumption | Once at baseline | Average number of cup of tea per day |
| Average coffee consumption | Once at baseline | Average number of cup of coffee per day |
| Average food consumption | Once at baseline | Average food consumption of 16 food groups |
| Diet characterization | Once at baseline | "How do you characterize your diet" measured on a visual analogue scale ranging from 0 (Not at all balanced) to 100 (Very balanced) |
| RPAQ questionnaire | Once at baseline | The Recent Physical Activity Questionnaire (RPAQ) assesses the level of physical activity and sedentary lifestyle in adults over the past four weeks. It is divided into three parts: work and study, home and leisure, and finally, stairs and travel. It makes it possible to classify individuals into several categories, one on sedentary lifestyle (low, resistant either 3-7h/day or high or \>7h/day) and one on the level of physical activity (\<8.3 Metabolic equivalent of task(MET).hour/week: inactive or \>8.3 MET.h/wk: active). |
| MBI questionnaire | Once at baseline | The Maslach Burn-out Inventory (MBI) is composed of 22 items designed to assess the three components of the burn-out syndrome: emotional exhaustion (9 items), depersonalization (5 items) and reduced personal accomplishment (8 items). The items are written in the form of statements about personal feelings or attitudes. Items are made of a 7-point scale frequency of feelings, varying from "never" to "every day". The scores for each component of the burn-out syndrome are considered separately. If desired for participant feedback, each score can be coded as low, average, or high. |
| JDCS questionnaire | Once at baseline | The Job Demand-Control-Support (JDCS) questionnaire of Karasek assess job demands, job control and social support through 26 items. The questionnaire measures nine items of job demands, nine items of job control and eight items of social support. Items of JDCS are scored on a four-point Likert-type scale, ranging from 1 = strongly disagree to 4 = strongly agree. Among the 26 items, five negative statements require reverse scoring. From French data, the job strain threshold is set for a demands score higher than 20 and a control score lower than 71; the isostrain threshold is determined from a combining score of job strain and social support lower than 24. We would ask the participants to fulfil the questionnaire from memories that they keep of their work. |
| ERI questionnaire | Once at baseline | The Effort-Reward Imbalance Questionnaire (ERI) is a self-administrated test assessing psychological distress and health problems that may occur when there is an imbalance between the efforts required by the work and the rewards received. We used the 46 items of the French version of the ERI model exploring efforts (six items), over commitment (eleven items), and rewards (seventeen items). Items of ERI were scored on a five-point Likert-type scale, ranging from 1 = disagree to 5 = agree and very disturbed. A ratio extrinsic efforts and rewards can assess the imbalance between these two dimensions. A ratio greater than one defines employees exposed to an imbalance between efforts and rewards. |
| Salivary cortisol | 6 am, beginning of the control day | Salivary cortisol measured in µg/dl |
| Salivary DHEAS | 6 am, beginning of the control day | Salivary DHEAS measured in pg/ml |
| Salivary leptin | 6 am, beginning of the control day | Salivary leptin measured in ng/ml |
| Salivary ghrelin | 6 am, beginning of the control day | Salivary ghrelin measured in ng/ml |
| Blood cortisol | 6 am, beginning of the cycloergometer day | Blood cortisol measured in ng/ml or nmol/l |
| Blood DHEAS | 6 am, beginning of the cycloergometer day | Blood DHEAS measured in µg/ml |
| Blood leptin | 6 am, beginning of the cycloergometer day | Blood leptin measured in ng/ml |
| Blood ghrelin | 6 am, beginning of the cycloergometer day | Blood ghrelin measured in pg/ml |
| Blood BDNF | 6 am, beginning of the cycloergometer day | Blood brain-derived neurotrophic factor (BDNF) measured in pg/ml |
| Blood pro-inflammatory cytokines | 6 am, beginning of the cycloergometer day | Blood pro-inflammatory cytokines measured in pg/ml |
| Blood NPY | 6 am, beginning of the cycloergometer day | Blood vascular distribution of neuropeptide Y (NPY) measured in pg/ml |
Countries
France
Contacts
CONTACTLise LACLAUTRE
PRINCIPAL_INVESTIGATORFréderic DUTHEIL
fdutheil@chu-clermontferrand.fr
Outcome results
None listed