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NCT Number: NCT07459764

Body Clocks - Coordination of Peripheral and Central Oscillators

The investigators are conducting an observational trial examining young women over the course of 28 days in which we are monitoring movement, sleep, heart rate, oxygen saturation, gut physiology, light, and menstrual cycle. The inter- and independence of the cyclicity of these variables with each other, the circadian cycle, the menstrual cycle, and the sleep cycle will be tested.

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Key information

Conditions

Circadian Dysregulation Chronobiology Disorders Nervous System Diseases

Age range

18 year–30 year

Sex eligibility

Female

Study type

Observational

Primary location

Stanford University

Stanford, California, 94305, United States

Location status: Recruiting

Location contact

Lara Weed

CONTACT

[email protected]

About this study

For 28 days, women will wear devices to capture: ambient light exposure, lower limb biomechanics, sleep, oxygen saturation, heart rate, temperature, and gut physiology.

Twice during the study, women will have saliva collected for 7 hours under dim light conditions in order to determine melatonin concentrations. During this 7-hour period, two blood draws for determination of proteomic profiles will also occur.

Daily urine samples will be tested for LH until the presence of the LH surge to help identify menstrual phase.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Regular menstrual cycle (21-35 days)
  • 18-30 years old

Exclusion criteria

  • Neuromuscular or neurodegenerative disease
  • Gut disorders
  • circadian sleep disorders
  • prescription medications affecting sleep
  • recovering from physical injury
  • taking hormonal birth control

Treatment and study plan

Primary outcomes

  1. Stride time

    Time frame: 28 days

    Duration of each stride

Secondary outcomes

  1. Sleep

    Time frame: 28 days

    Daily sleep duration determined through actigraphy

Study contacts

Contact information is provided by the study sponsor or research team.

Lara Weed, BS, MS

CONTACT

[email protected]

650-723-2300

Sponsors and collaborators

Lead sponsor

Stanford University

Other

Registry information

Official study title

Confluence of Sleep, Circadian Rhythms, and the Menstrual Cycle on Injury Risk in Women

Important dates

Study start
2026
Primary completion
2026
Study completion
2026
First posted
Mar 10, 2026
Registry last updated
Apr 24, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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