Can a strange bed sabotage your workout? sex differences put to the test

NCT ID NCT07758166

Completed Knowledge-focused Sponsor: University of Alcala Source: ClinicalTrials.gov ↗

First seen Aug 11, 2026 · Last updated Aug 12, 2026 · Updated 1 time

Summary

This trial asks whether the 'first-night effect'—poorer sleep in an unfamiliar place—impairs next-day strength and muscular endurance, and whether men and women respond differently. Thirty-two resistance-trained adults (16 women, 16 men) will sleep 8 hours at home and 8 hours in a lab, then perform bench press, squat, grip, and jump tests. The goal is to see if sleep environment affects physical performance and if the impact varies by sex.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance: Sleeping in a laboratory versus at home (behavioral intervention)
What this could lead to: If sex differences are found, training and competition schedules could be tailored to account for sleep environment effects on performance.
What could go wrong: This is a small, early-stage study (32 people) and results may not apply to all athletes or real-world settings. The effect may be small or inconsistent.

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Conditions

The condition(s) this trial relates to.

sleep disorder

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

SLEEP

Contacts and locations

Locations

Facultad de Medicina y Ciencias de la Salud. Universidad de Alcalá

Alcalá de Henares, Madrid, 28805, Spain

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