Istvan is an architect of the Long-Term Athlete Development framework and is a Planning and Periodization expert on which he’s published over 75 articles and chapters. His series on Long-Term Athlete Development and Periodization have both been published in Australia, Canada, the United States and the United Kingdom. Within Canada, Istvan has worked with 17 different National Teams as a high-performance advisor and planning and periodization consultant. Istvan is also a national and international Long-Term Athlete Development advisor. Internationally, he has lead program development in the United States, South Africa, England, Ireland, Sweden, and Bahrain.