Abstract des Autors

During 41 days of training at high altitude and at sea level and a competition phase of 11 male and female athletes each, the absolute and 24 h renal excretion of magnesium was measured. The magnesium excretion during 24 h was 9.93 +/- 2.62 mmol/l for men and 7.35 +/- 1.83 mmol/l for women. The average daily time of training was about 114 +/- 12 min for the men and women. 71% of the rowing intensities were performed with less than 2 mmol/l lactate, 6% in the area between 2-4 mmol/l and 1% above 4 mmol/l; the proportion of strength-endurance training was 9% and that of general endurance training (lactate < 2 mmol/l) was 13%. Using regression analysis, it can be shown that there is a highly significant correlation between training load and 24 h magnesium excretion of men; for women, a similar tendency can be shown. Verf.-Referat