After the 1982 season, collaboration between Vainio and coach Potinkara ended amicably and Vainio started to train by himself. However, certain people started to influence his training; among them was Jouko Elevaara, known as the coach of Kaarlo Maaninka. Vainio has stated that he started to use hormones in the autumn of 1982 to avoid the detrimental effects of overtraining in his preparation for the first World Championships in Helsinki, the capital of his home country, Finland. According to Vainio, the first hormone ampullas were obtained from Palermo in the autumn of 1982.