21 citations
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September 2013 in “Journal of circadian rhythms” Intense exercise at night can delay the body's internal clock gene expression by 2 to 4 hours.
14 citations
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June 2016 in “Hypertension research” New method uses hair follicle cells to estimate human body clock phase, potentially improving sleep disorder diagnosis.
March 2025 in “bioRxiv (Cold Spring Harbor Laboratory)” HairTime can predict and adjust human sleep patterns using a hair sample.
49 citations
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April 2016 in “International journal of molecular sciences” Shift nurses show altered body temperature and stress hormone levels, suggesting their body clocks adjust to irregular schedules.
9 citations
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July 2018 in “European journal of dermatology/EJD. European journal of dermatology” Disrupted sleep patterns can harm skin and hair cell renewal, but melatonin might help.