Carmelo Bosco mostly worked in Finland as a researcher in the laboratory of Sports Biology at the University of Jyvaskyla and as the Director of the Laboratory of Biomechanics and Physiology of Sports in Kuortane, in those years the main centre for the physical preparation of most of the Finnish elite athletes.

In this phase the scientific activity focuses on muscular mechanics and the effects of pre-stretching.

A fundamental discovery in 1982 is that pre-stretching allows the accumulation of elastic energy in the muscle improving the performance in the positive phase of muscular work (Bosco et al., Int J Med Sport, 3, 1982). (Bosco et al., Acta Physiol Scand, 128, 1986).

This was demonstrated for fast fibres as well as for slow ones depending on the speed and amplitude of the movement. (Bosco et al.,Acta Physiol Scand, 116, 1982).

This research, together with the studies carried out in Russia in the sixties, allowed the development of plyometric training, widely used today in the world of sports.