How time of day and your menstrual cycle affect strength and thinking
Part of Brain & nervous system, Hormones & metabolism, Women’s health & pregnancy clinical trials.
This study looks at how your menstrual cycle and the time of day affect your physical strength and thinking skills. If you are a female athlete with a regular period, you may be able to help researchers understand these effects.
Summary written for real people, not researchers, by Clin2.
Who can take part
- You were assigned female at birth.
- You are between 18 and 30 years old.
- You are a tier 2 athlete: you train about 3 times a week, compete at a local level (like in university sports), and have a specific sport in mind.
- You have regular periods (every 21 to 35 days, with at least 9 periods a year).
- You have not used any hormonal birth control (like pills, implants, or IUDs) in the last 3 months.
- You have not taken emergency contraceptive pills in the last 3 months.
- You do not have any diagnosed menstrual disorders (like endometriosis or PCOS), sleep disorders, or certain brain-related conditions (like ADHD, autism, dyslexia, or schizophrenia).
- You do not have a recent injury (past 3 months), do not take more than 400 mg of caffeine daily, and have not donated blood in the last 12 weeks.
Quick eligibility check
Answer a few plain-language questions, based on this study's own requirements, to get a preliminary sense of fit.
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