PD Dr. S. Lorenzetti is currently the head of the section Performance Sport at the Swiss Federal Institute of Sport Magglingen SFISM. He was the leader of the Sports Biomechanics Group at the Institute for Biomechanics at the Department of Health Science and Technology of ETH Zurich, Switzerland for nine years. In 2017 he received the Venia Legendi in the area of ''Biomechanics'' at ETH Zurich and is now a privat docent. He studied physics, mathematics and astronomy at the University of Bern with an exchange term at the University of Strathclyde, Glasgow, UK. Current research in the area of sports biomechanics includes industry-funded projects and a KTI funded projects as well as the modeling of strength exercises. He is especially interested in the external and internal loading conditions of the human body during strength training and sports and the corresponding loading of the joints and biological structures. The combination of experimental approaches, combined with whole body simulation allows the influence of macroscopic loading on microscopic structures to be studied. He has authored more than 70 peer-reviewed papers and supervised 85 Bachelor and Master students. In 2013 he founded a spin-off company, LLS biomechanics GmbH, consulting and educating in biomechanics and in 2015 he was co-funder of the start-up SensoMATive GmbH. In 2014 he was elected as a Director of the International Society of Biomechanics in Sports and in 2015 he was appointed as treasurer.