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[Does the time change affect school children?]

G Lac1, G Clevidy, A Robert

  • 1Laboratoire de la performance motrice, UFR STAPS, Aubière, France.

Pediatrie
|January 1, 1993
PubMed
Summary
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Young pupils' cortisol rhythms adjusted to earlier summer time. The study found that circadian rhythms synchronized with the summer clock after 15 days, despite the time shift.

Area of Science:

  • Chronobiology
  • Endocrinology
  • Pediatric Physiology

Background:

  • Daylight Saving Time (DST) shifts can disrupt natural circadian rhythms.
  • Understanding physiological responses to time changes in children is crucial for health.
  • Cortisol levels are a key indicator of the body's internal clock.

Purpose of the Study:

  • To investigate the physiological impact of a 1-hour earlier awakening due to DST on young pupils.
  • To measure salivary cortisol levels as a biomarker for circadian rhythm adjustment.
  • To determine the duration required for circadian rhythm synchronization with the new time.

Main Methods:

  • Salivary cortisol levels were measured in young pupils.
  • Participants experienced a 1-hour advancement in clock time (summer time).

Related Experiment Videos

  • Cortisol levels were monitored to assess circadian rhythm alignment.

    • Main Results:

    • The cortisol circadian rhythm successfully synchronized with the summer clock time.
    • Synchronization occurred after a period of at least 15 days.
    • The findings indicate a physiological adaptation to the DST shift.

    Conclusions:

    • Young pupils' circadian systems can adapt to a 1-hour earlier awakening.
    • Cortisol rhythm adjustment to summer time takes approximately 15 days.
    • This research provides insights into the resilience of pediatric circadian biology to DST.