Porta S1,2, Negreanu-Pirjol T6, Moser M2, Gell H2, Kastner A2, Kisters K3, Stossier H5, Stossier G5,
Papousek I4, Hahn C2, Schmid-Zalaudek K4, Gasser R7, Bratu MM6

1 Institute of Applied Stress Research, Fernitz – Mellach, Austria
2 Theresan Military Academy, Wiener Neustadt, Austria
3 St. Anna Hospital, Herne
4 Institute of Physiology, University of Graz, Austria

5 Rehabilitation Clinic Maria Wörth, Austria
6 Faculty of Pharmacy, Ovidius University of Constanta, Romania, centrul romano-austriac de cercetari stiintifice in domeniul stressului
Clinic of Internal Medicine, Dep. of Cardiology, Medical University of Graz, Austria

17 male officer trainees (between 20 and 24 years of age) of the Theresan Miltary Academy in Wiener Neustadt (Austria) have been subjected to an interactive computer operated wargame. Before and after the test, ion. Mg, ion. pCO2 and. RRsys were determined from capillary blood.

Within one hour of mental strain, Mg, and pCO2 decrease significantly, hence Mg decrease is obviously coupled to increased metabolic turnover. Linear correlations of Mg and its delta values show, that due to mental strain metabolism increases significantly along with Mg loss from tissues. The concomitant Mg increase along with changing stress markers like pCO2 and RRsys seems to be not in accordance with the alleged Mg loss. The discrepancy is cleared by showing, that Mg increase is relative – the highest Mg values due to highest strain are seen in those persons with the relative smallest Mg loss. Thus, the velocity of Mg loss depends upon mental strain (and up to a degree upon Mg tissue reserves) in a similar way as it does during physical load.