Do increased levels of ionized Mg in blood influence subsequent physical exertion? A survey of 320 cadets

From the fingertips of a cohort of 320 young officer trainees, 100 mu L of blood were sampled before and after a 2,400-m run to determine pCO(2), base excess (BE), and ionized Mg for the purpose of investigating the possibility of an influence of high basal Mg levels on subsequent physical exertion. It turned out that basal high ionized Mg has heterogenous sources and could therefore not homogeneously influence subsequent performance. However, quotients of pCO(2) or BE with ionized Mg are suitable for prediction of different types of physical exertion at the same performance. However, quotients of pCO(2) or BE with ionized Mg are suitable for such predictions. Mental situation influences ionized blood Mg as well as respiratory and metabolic compensation before and during sports in a decisive manner.