title: Blood levels of some electrolytes and hormones during exercise in athletes.
abstract: Athletes (8 trained medium and long distance runners) have been explored before and after physical exercise under two testing procedures. After the ergometric test significant increases of Ca++ and Mg++ in serum and significant decrease of Mg++ in erythrocytes occurred. A marked increment of the cortisol level and lesser changes of the thyroid hormones have been found. After the specific training program, apart from the significant reduction of the erythrocyte Mg++, a very significant increase of the cortisol level and large increments of T3 occurred. All subjects showed good coping resources, with inter-individual differences for other three psychological variables.
authors.affiliation: Polyclinic of Sportsmen, Dept. of Endocrinology, Cluj-Napoca, Romania.
authors.forename: E
authors.initials: E
authors.lastname: Duma
authors.forename: P
authors.initials: P
authors.lastname: Orbai
authors.forename: P
authors.initials: P
authors.lastname: Derevenco
mesh_terms: D000223:Adaptation, Psychological; D000328:Adult; D001519:Behavior; D002118:Calcium / Q000097:blood; D004573:Electrolytes / Q000097:blood*; D004912:Erythrocytes / Q000378:metabolism; D015444:Exercise / Q000502:physiology* / Q000523:psychology; D006728:Hormones / Q000097:blood*; D006801:Humans; D006854:Hydrocortisone / Q000097:blood; D008274:Magnesium / Q000097:blood; D012420:Running; D013177:Sports; D013974:Thyroxine / Q000097:blood; D014284:Triiodothyronine / Q000097:blood
chemical_list: D004573:Electrolytes; D006728:Hormones; D014284:Triiodothyronine; D008274:Magnesium; D013974:Thyroxine; D002118:Calcium; D006854:Hydrocortisone