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

Fiorica, Vincent; Burr, Mary Jo; Moses, Russell; United States. Office of Aviation Medicine

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

1968-03-01
By Fiorica, Vincent ; Burr, Mary Jo ; Moses, Russell

[PDF-389.72 KB]

English

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Creators:

Fiorica, Vincent ; Burr, Mary Jo ; Moses, Russell

Fiorica, Vincent ; Burr, Mary Jo ; Moses, Russell Less -
Corporate Creators:

United States. Office of Aviation Medicine
Subject/TRT Terms:

[+]

Air Pilots Blood Blood--Analysis Calcium Chlorides Circadian Rhythms Creatinine Exercise Experiments Human Subject Testing Internal Organs Kidneys Magnesium Sleep Urea Urine Urine--Analysis
Publication/ Report Number:

AM 68-4 ; DOT/FAA/AM-68/04

AM 68-4 ; DOT/FAA/AM-68/04 Less -
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.
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PDF
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FAA Civil Aerospace Medical Institute US Transportation Collection
Main Document Checksum:

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urn:sha256:78690a1cb130127d374f1b4a85ff51093f14ffdaccf8f12c1f9c231a893d12a9
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https://rosap.ntl.bts.gov/view/dot/20842/dot_20842_DS1.pdf
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Contribution of activity to the circadian rhythm in excretion of magnesium and calcium.

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