Effects of Exercise Timing on Sleep Quality

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

NA

Total Enrollment

42 participants

Study Classification

INTERVENTIONAL

Study Start Date

2026-01-23

Study Completion Date

2027-11-30

Brief Summary

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Modern lifestyles are marked by a prevalence of sedentary behaviors and physical inactivity, which have been linked to numerous adverse health effects. While regular physical exercise is a well-established countermeasure, exercising in the late afternoon may paradoxically disrupt deep sleep due to increased core body temperature. Inactive and sedentary individuals, who often have impaired autonomic function compared to endurance-trained athletes, may be particularly susceptible to these negative effects, potentially resulting in compromised thermoregulation and exacerbated disruptions to deep sleep, a critical stage of sleep essential for overall recovery. Therefore, this study aims to investigate the impact of aerobic exercise performed in the late afternoon versus morning on: 1) deep sleep and sleep onset latency; and 2) core body temperature and its autonomic regulatory mechanisms on endurance-trained and inactive-sedentary people.

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Detailed Description

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Conditions

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Healthy Endurance Athlet Inactive People

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

CROSSOVER

This is a single-center, open-label, randomized controlled trial with two parallel crossover groups:

* "Active" group
* "Inactive-sedentary" group

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

NONE

Study Groups

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"Inactive-sedentary" group

inactive participants that realize 3 experimental conditions: evening exercise, morning exercise and control (no-exercise).

Group Type ACTIVE_COMPARATOR

Aerobic Exercise

Intervention Type OTHER

The physical exercise consist of treadmill running at 65% of the maximal aerobic speed (MAP) until exhaustion (time to exhaustion exercise type).

"Active" group

endurance athletes that realize 3 experimental conditions: evening exercise, morning exercise and control (no-exercise).

Group Type EXPERIMENTAL

Aerobic Exercise

Intervention Type OTHER

The physical exercise consist of treadmill running at 65% of the maximal aerobic speed (MAP) until exhaustion (time to exhaustion exercise type).

Interventions

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Aerobic Exercise

The physical exercise consist of treadmill running at 65% of the maximal aerobic speed (MAP) until exhaustion (time to exhaustion exercise type).

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* Group "Inactive" :No regular exercise practice (inactive people that don't follow the WHO recommendations) and have sedentary behaviors
* Group "Active": Regular exercise (athletes that are specialized in aerobic exercise, with more than 300 minutes per-week over 6 months and practice at regional level).

Exclusion Criteria

* Have sleep disorders medically diagnosed or detected by sleep forms cutoffs (clinical insomnia by ISI, severe risk of obstructive sleep apnea by Stop-Bang, bad sleep quality by PSQI.
* Have a diagnosed mental health condition requiring treatment
* Have renal, respiratory, cardiovascular or neuromuscular disease medically diagnosed.
* Be pregnant or breastfeeding

Minimum Eligible Age

18 Years

Maximum Eligible Age

30 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes