# Beneficial Effects of Daytime Light Exposure and Physical Activity on the Human Circadian Clock and Sleep

> **NCT05513547** · NA · COMPLETED · sponsor: **University Hospital, Basel, Switzerland** · enrollment: 51 (actual)

## Conditions studied

- Circadian System

## Interventions

- **OTHER:** LE protocol 1: exposure to artificial light
- **OTHER:** LE protocol 2: natural daylight
- **OTHER:** LE protocol 3: natural daylight with reduced short-wavelength proportions

## Key facts

- **NCT ID:** NCT05513547
- **Lead sponsor:** University Hospital, Basel, Switzerland
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2023-04-27
- **Primary completion:** 2025-09-12
- **Final completion:** 2025-09-12
- **Target enrollment:** 51 (ACTUAL)
- **Last updated:** 2025-09-26

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT05513547

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT05513547, "Beneficial Effects of Daytime Light Exposure and Physical Activity on the Human Circadian Clock and Sleep". Retrieved via AI Analytics 2026-06-23 from https://api.ai-analytics.org/clinical/NCT05513547. Licensed CC0.

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