Za Co Odpowiadają Receptory β1-AR I β2-AR (adrenergiczne)? Sterydy oraz anaboliki w małych kosztach The aim of the study is to determine what kind of doping and what kind of supplements are in use by those exercising in gyms in Bydgoszcz. The study was conducted among people practicing in gyms in Bydgoszcz. Based on research it can be concluded that the anabolic androgenic steroids are the most commonly used doping. It can be also conclude that a significant proportion of.