Biochemical indices of selected trace minerals in men: effect of stress.
Plasma zinc, iron, copper, and selenium and selected blood proteins were measured in 66 men before (BHW) and after (AHW) a 5-d period of sustained physical and psychological stress called Hell Week. Recovery blood samples were obtained from 26 men 7 d after Hell Week. Dietary intakes were determined BHW and during Hell Week; zinc, iron, copper, and selenium intakes during Hell Week averaged 23.6 +/- 3.4 mg/d, 35.4 +/- 3.9 mg/d, 3.0 +/- 0.5 mg/d, and 92.5 +/- 26.7 micrograms/d, respectively. C-reactive protein was detected in only five subjects BHW and in all subjects AHW. Zinc, iron, selenium, and albumin decreased by 33%, 44%, 12%, and 9%, respectively, whereas ferritin, ceruloplasmin, and creatine kinase concentrations increased AHW by 59%, 8%, and 266%, respectively. Haptoglobin concentrations increased 57% in 30 subjects but decreased 32% in 23 subjects AHW. The biochemical changes were transitory because protein (except ferritin) and mineral concentrations were similar to BHW values 7 d after Hell Week. Hell Week induced changes characteristic of an acute-phase response in physically active men.
Singh
A
A
Department of Military Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD 20814-4799.
Smoak
B L
BL
Patterson
K Y
KY
LeMay
L G
LG
Veillon
C
C
Deuster
P A
PA
D000704:Analysis of Variance; D001798:Blood Proteins / Q000378:metabolism; D004435:Eating; D006801:Humans; D008297:Male; D010806:Physical Education and Training; D013315:Stress, Psychological / Q000097:blood / Q000378:metabolism* / Q000652:urine; D013997:Time Factors; D014131:Trace Elements / Q000378:metabolism*
D001798:Blood Proteins; D014131:Trace Elements