title: [The oral magnesium loading test for detecting possible magnesium deficiency].
abstract: In 26 top sportsmen (volleyball players, rower) aged 15-18 years the serum magnesium level and urinary Mg excretion before and after oral administration of 5 g Mg lactate was assessed (oral magnesium load test). In 11 sportsmen (42.3%) a low percentage of excretion of administered Mg was found, suggesting magnesium deficiency, irrespective of the basal serum Mg levels. After subsequent 10-day Mg supplementation 6 volleyball players responded by a markedly lower retention after an identical Mg load, again without marked changes of the serum Mg level. The authors consider the magnesium load test a more sensitive indicator of latent Mg deficiency than the serum Mg level which is maintained at a relatively stable level and declines only in severe deficiency. The test assumes normal renal function and intestinal absorption.
authors.affiliation: Klinika tĕlovýchovného lékarství FN v Olomouci.
authors.forename: H
authors.initials: H
authors.lastname: Vizinová
authors.forename: J
authors.initials: J
authors.lastname: Bártek
authors.forename: Z
authors.initials: Z
authors.lastname: Jirka
authors.forename: L
authors.initials: L
authors.lastname: Steidl
mesh_terms: D000284:Administration, Oral; D000293:Adolescent; D006801:Humans; D008274:Magnesium / Q000008:administration & dosage; D008275:Magnesium Deficiency / Q000175:diagnosis*; D008297:Male
chemical_list: D008274:Magnesium
vernacular_title: Perorální zátĕzový magnéziový test ke zjistĕní mozného magnéziového deficitu.