Just 3 nights of shift work may weaken bones, small study suggests

NCT ID NCT05074277

Completed Knowledge-focused Sponsor: University of Colorado, Denver Source: ClinicalTrials.gov ↗

First seen Jun 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study looked at whether working night shifts for just three nights in a row can disrupt bone health. Twenty healthy adults aged 20-40 either followed a normal sleep schedule or stayed awake at night and slept during the day. Researchers measured bone turnover markers to see if the body's bone-building and bone-breaking processes become unbalanced. The goal is to understand why shift workers face higher osteoporosis risk.

What this could mean

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

What this could lead to: If successful, this study could help explain why night shift workers have higher rates of osteoporosis, pointing toward future prevention strategies.
What could go wrong: This is a very small, early-stage study with only 20 participants. Results may not apply to real-world shift workers or lead to any direct health changes.

This is an AI summary of the original study and may miss details. Read our disclaimer.

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Conditions

The condition(s) this trial relates to.

circadian rhythm sleep disorder circadian rhythm sleep disorder, shift work type osteoporosis

As listed by the trial registrant

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

CIRCADIAN RHYTHM SLEEP DISORDER, SHIFT WORK TYPE OSTEOPOROSIS

Contacts and locations

Locations

CU Anschutz

Aurora, Colorado, 80045, United States

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