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Investigating the Effects of Time-of-day and Menstrual Cycle Phase (Low and High Progesterone) on Female's Cognitive and Strength Performance

NCT07399847 · Status: NOT_YET_RECRUITING · Type: OBSERVATIONAL · Enrollment: 30

Last updated 2026-02-10

No results posted yet for this study

Summary

This study is designed to determine whether time-of-day and menstrual cycle phase influence athletic performance and is expected to contribute valuable insight into how both time-of-day, and hormonal factors can influence performance and expand existing research. This study aims to support more inclusive, effective and personalised approaches to training and competition schedules for female athletes.

The study will involve two testing days that require a participant to complete a compilation of tests at 07:00, 12:00 and 18:00 hours. The testing days will be arranged for when a participant is in phase 1 (lowest levels of progesterone in the menstrual cycle) and phase 4 (highest level of progesterone in the menstrual cycle). The tests will examine a participant's executive function and physical strength.

This study will aim to recruit thirty 18-30-year-old females from Lancaster University who identify with a sport that they train \~3 times a week for with a purpose to compete. The females recruited must have a regular menstrual cycle and no history of sleep disorders.

Aim: To investigate the effects of time-of-day and menstrual cycle phase (low and high progesterone levels) on executive function and strength in females.

Objectives:

1. To determine the effects of time-of-day on executive function and strength tests.
2. To determine the effects of menstrual cycle phase on executive function and strength tests.
3. To examine if there is an interaction between time-of-day and menstrual cycle phase on executive function and strength tests.

Conditions

  • Circadian Rhythm
  • Menstrual Cycle Phase
  • Female Athletes
  • Executive Function (Cognition)
  • Eumenorrhea
  • Strength

Sponsors & Collaborators

  • Liverpool John Moores University

    collaborator OTHER

  • Lancaster University

    lead OTHER

Eligibility

Min Age
18 Years
Max Age
30 Years
Sex
FEMALE
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2026-02-28
Primary Completion
2026-06-30
Completion
2026-09-30

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07399847 on ClinicalTrials.gov