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ID
Source
Brief title
Health condition
Not applicable
Sponsors and support
Intervention
Outcome measures
Primary outcome
Thermal comfort
Secondary outcome
thermal sensation, visual perception, participants’ behaviour over the personal lighting system, cognitive performance, heart rate, blood pressure, blood flow, gross physical activity, energy expenditure and body temperatures
Background summary
Rationale: In order to fulfil the demand of thermal comfort, current environmental design practice narrows the temperature into a small range. Expanding the temperature range offers a significant energy-saving potential and may elicit some important health benefits. Nevertheless, expanding the temperature range may compromise thermal comfort. Studies have shown that environmental factors can interact with each other to a certain extent. Especially, the indoor light can affect thermal comfort, which provides a possible mean to expand the acceptable temperature range while providing comfort.
Objective: To study the effect of individual control of the light on thermal comfort
Study design: This study is a within-subject experiment, which will include four lighting conditions. Those four lighting conditions are either with personal control of light or without personal control of light, in combination with two different initial light settings. To balance the order of the conditions, the orders are taken from a 4×4 latin square table and participants will be randomly assigned to one of the orders. During each condition, thermal perceptions, visual perceptions, physiological parameters, lighting control and cognitive performance will be measured.
Study population: 20 healthy lean participants in total aged between 18 and 40 years, BMI >18 and <27.5 kg/m2 will be included.
Main study parameters/endpoints: Difference in thermal comfort between
with-control conditions and no-control conditions.
Nature and extent of the burden and risks associated with participation, benefit and group relatedness: This study carries no benefits for the subjects. It is not a therapeutic research. However, the study will lead to novel insights into the effect of personal control of light on thermal comfort and various health-related parameters such as blood pressure, heart rate and energy expenditure. The risk of COVID-19 infection is low. The major burdens consist of recurrent laboratory visits, a moderate time commitment and exposure to warmer and cooler indoor environments than usual. Furthermore, subjects are asked to regulate their eating and exercise habits one day before each measurement day of the study to limit external influences on the measurement of physiological parameters. This may be a small social and psychological burden.
Study objective
The personal control of light can compensate thermal discomfort
Study design
5 time points - one screening visit and four testing visits
Intervention
Light
Inclusion criteria
- Caucasian
- BMI: 18-27.5
- Age: 18-40
- Healthy
- Non-smoker
- Live in the Netherlands (or area near the Netherlands) for at least 2 months
- For female: on contraception
Exclusion criteria
- Extreme chronotype
- Cardiovascular diseases
- Diabetes or abnormal sugar levels
- Ocular pathologies
- Colour blindness
- Hypertension (systolic/diastolic blood pressure >140/90)
- Hypotension (systolic/diastolic blood pressure <90/60)
- Any medical condition requiring treatment and/or medication that might interfere with the investigated parameters.
- Presence of Raynaud’s phenomenon
- Participation in another biomedical study within 1 month prior to screening visit
- Jet lag or night shift work in the past 2 months
Design
Recruitment
IPD sharing statement
Followed up by the following (possibly more current) registration
Other (possibly less up-to-date) registrations in this register
No registrations found.
In other registers
| Register | ID |
|---|---|
| NTR-new | NL9387 |
| CCMO | NL76263.068.20 |
| OMON | NL-OMON51211 |