Contribution of activity to the circadian rhythm in excretion of magnesium and calcium.

Details

• Creators:
  Fiorica, Vincent ; Burr, Mary Jo ; Moses, Russell
• Corporate Creators:
  United States. Office of Aviation Medicine
• Subject/TRT Terms:
  • Air pilots
  • Circadian rhythms
  • Urine
  • Urea
  • Magnesium
  • Calcium
  • Sleep
  • Blood
  • Internal organs
  • Experiments
  More +
• Publication/ Report Number:
  AM 68-4 ; DOT/FAA/AM-68/04
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  Civil Aerospace Medical Institute
• Abstract:
  Eight subjects were maintained on a standard dietary regimen ingested every four hours for 120 hours. Measurements of the magnesium and calcium excretion in these subjects revealed a circadian periodicity with maximal levels of excretion for both ions occurring during the sleeping hours (2200-0600) and minimal levels occurring during the mid-day (1000-1400). Further studies on the effects of activity (exercise) on the excretion of magnesium and calcium demonstrated a marked decrease during and following exercise accompanied by no significant change in the plasma concentrations of the two ions. ; These data suggest that the periodicity in excretion reported here reflects an activity cycle generated by alternated periods of sleeping and waking and may not represent an endogenous rhythm of magnesium and calcium excretion.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/20842/dot_20842_DS1.pdf
• File Type:
  [PDF - 389.72 KB]
• Collection(s):
  US Transportation Collection ; FAA Civil Aerospace Medical Institute
• Main Document Checksum:
  urn:sha-512:bbc5afcfc2c98ca68449d865796a029190d367636de94ffce1b58bbf2a9219030a27b7dfae04d22fe3262ea41139531f58dc9582e56059c91ffd92e7aad39e56