Concentration of Ca in Blood of Amateur Runners using NAA

In this study the Ca levels were determined in amateur runners blood at LABEX (Laboratorio de Bioquimica do Exercicio - UNICAMP, Brazil), using Neutron Activation Analyses (NAA) technique. The range established at rest (162 - 410 mgL(-1)) when compared with control group (51 - 439 mgL(-1)) suggests that there is a dependency of these limits in the function of the adopted physical training.