SIQUIER COLL, JESÚS, Bartolome, I. , Perez-Quintero, M. , Grijota, F. J. , Robles, M. C. , Munoz, D. , Maynar-Marino, M.
Si
J. Therm. Biol.
Article
Científica
2.361
0.68
01/02/2019
000460827600001
Aim: The aim of this study was to evaluate the effect of the performance of a maximal exercise test until exhaustion in normothermic and hyperthermic conditions on body concentrations of magnesium (Mg) and phosphorus (P). Methods: 19 adult males (age: 22.58 +/- 1.05 years) performed two maximum incremental exercise tests on a cycloergometer separated by 48 h. The first was performed in normothermia (22 +/- 2 degrees C) and the second in hyperthermic conditions induced with a sauna (42 +/- 2 degrees C). Blood and urine samples were taken before and after each test. Results: The tests in hyperthermia did not produce ergospirometric alterations or a noticeable cardiovascular drift. Serum Mg concentrations underwent a reduction after the stress test in hyperthermia (p > 0.05) but not in normothermia. Nevertheless, urinary and erythrocyte concentrations of Mg, and urinary, erythrocyte and serum concentrations of P did not undergo alterations in either conditions. Conclusions: It seems that exercise in hyperthermic conditions induces a tissue redistribution of Mg in the body, a fact which was not observed in normothermic conditions.
Magnesium; Phosphorus; Heat stress; Urine; Serum; Erythrocyte