Effects of an afternoon stroll under different light conditions on alertness, sleep quality and -perceptio

Withdrawn

• Conditions: slaap en alertheid; sleep

• Registration Number: NL-OMON44189
• Lead Sponsor: Rijksuniversiteit Groningen

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Last Update Posted: 15 April 2024

Recruitment & Eligibility

• Status: Withdrawn
• Sex: Not specified
• Target Recruitment: 18

Inclusion Criteria

- Age between 20-30
- Healthy
- Dutch speaking
- Early chronotypes

Exclusion Criteria

- Diagnosed color blindness (Ishihara's color blindness test)
- Use of photosensitizing medication or sleep medication
- Drug use
- Moderate to high levels of caffeine intake during a day (5 or more cups)
- Smokers
- Diabetic disease
- Shift work schedule in the 3 months prior to participation
- Travel over 2 or more time zones in 1 month prior to participation
- Epworth Sleepiness Scale <18
- PSQI < 6
- Usage of oral melatonin
- Daily exposure to high amounts of light (outside work)
- Lack of access to a refridgerator
- Females: if not on hormonal birthcontrol

Study & Design

• Study Type: Observational non invasive
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
<p>The main study parameter is objective sleep quality, characterized by higher<br /><br>amounts of slow wave activity and fewer sleep arousals and awakenings. This<br /><br>will be measured throughout the night using EEG loggers on both intervention<br /><br>days. </p><br>

Secondary Outcome Measures

Name	Time	Method
<p>Secondary output parameters are subjective alertness, measured with the<br /><br>Karolinska Sleepiness Scale and perceived sleep quality, quantified by the<br /><br>Groninger Sleep Quality Questionnaire.</p><br>