Medizinische Universität Graz - Research portal
Selected Publication:
Leitner, G; Westmoreland, D; Knapp, M; Spencer, K; Merback, J; Kuzik, V; Temmel, W; Schubert, K; Porta, S.
Stress compatibility and electrolyte dynamics of sports majors (SM) and language majors (LM) at examination time
MAGNESIUM-BULL 2000 22: 66-71.
Web of Science
- Leading authors Med Uni Graz
- Leitner Gerhard
- Porta Sepp
- Co-authors Med Uni Graz
- Temmel Werner
- Altmetrics:
- Abstract:
- Objectivation of a so called school stress was tried to be achieved by measuring blood gas, electrolyte, lactate and blood glucose alterations after standardized cycle ergometry (post stress provocation test, Porta et al. 1993) out of different basal situations and with two different groups of probands. Since catecholamines and many of their effects are additive, reaction to cycle ergometry depends upon basal values and personal circumstances. Basal values have been altered by applying one and the same test once during relative school stress free autumn and once during busy examination time in January. Personal circumstances were taken into consideration by testing a group of more sedentary female Language majors against a group of nearly professionally managed soccer players from the same school and the same average age of about 17.It turned out that already basal values in autumn and January were significantly different in many cases. Reaction to exercise was also much more pronounced in January in both groups. However. the sport group obviously could take higher stress levels at examination time significantly better than the language majors, a fact deducible by significantly different basal values of higher pH and lower pCO(2) and much lower exercise induced alterations in lactate (ca.50 %), much less decrease in base excess, higher pH and many other parameters. Physical training seems to diminish psychologically induced catecholamine effects significantly.Of special importance seems to be the low magnesium status of the female probands and the much better situation in sportsmen, in spilt of intensive training. Instructions by trainers could be the reason. The more so, as the satisfactory Mg status of autumn deteriorates in the winter off season rime.Thus, impact of school stress is measurable not only by psychological but also by serological methods, which may even be of mutual support. The upsetting magnesium situation. especially of our female probands should be carefully followed up concerning a possible general deficiency.