Leonidas Petridis is a Senior Researcher at the Hungarian University of Sports Science in Budapest, Hungary. He completed his bachelor’s degree in Physical Education at the University of Physical Education Budapest in 1994, his master’s degree in Health and Exercise at the University of Thessaly in Greece, and received his Doctoral degree in Sport Science from the Semmelweis University Budapest in 2005. His research interests primarily focus on the cardiological adaptation to physical activity and exercise in young athletes from various sport disciplines. Currently, his research involves neuromuscular adaptation, performance testing and optimization of training loads in young athletes. He is a member of the European College of Sport Science and of the Hungarian Society for Sport Science.