Volpe SL, Lowe NM, Woodhouse LR, King JC. Effect of maximal exercise on the short-term kinetics of zinc metabolism in sedentary men.
Br J Sports Med 2007;
41:156-61. [PMID:
17138634 PMCID:
PMC2465216 DOI:
10.1136/bjsm.2006.030346]
[Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/08/2006] [Indexed: 11/03/2022]
Abstract
OBJECTIVE
To examine the effect of acute exhaustive exercise versus rest on short-term zinc kinetics in men.
DESIGN
Crossover design, wherein all subjects were their own control.
SETTING
University setting, where subjects were free living.
PARTICIPANTS
12 healthy, sedentary men, 25-35 years of age.
INTERVENTIONS
(70)Zn was infused 10 min after exercise or at rest. Plasma zinc concentrations were measured at baseline and 2, 5, 10, 15, 30, 45, 60, 75, 90 and 120 min after exercise or rest. Haematocrit was measured before and after exercise to assess changes in plasma volume.
MAIN OUTCOME MEASUREMENTS
Plasma zinc (primary), serum creatine kinase and serum cortisol concentrations (secondary).
RESULTS
Plasma zinc concentrations decreased (p<0.05) after exercise, with a mean (SD) nadir of 13.9% (4.1%) observed at 70 min after exercise. There were increases in the size of the rapidly exchangeable plasma zinc pool (Qa; from 3.1 (0.2) to 3.6 (0.2) mg; p<0.05) and the liver zinc pool (Qb; from 10.2 (0.6) to 11.4 (0.8) mg; p = 0.12).
CONCLUSION
Exercise seems to cause a shift of plasma zinc into the interstitial fluid and liver after exercise, which may reflect the acute stress response of strenuous exercise.
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