The Climate Effect is very often called a miracle by parents of children saved from obesity. Nothing could be more wrong. It is hard and systematic work that requires cooperation and commitment of the whole family. Leszek Klimas is the creator of an original nutrition and training program. Its basic assumption is an individual approach to each client - child, teenager, adult. Leszek Klimas' patients are in constant contact with him. The motivation of Leszek - the world champion of athletics from 2019 is legendary. The nutrition system and exercise program are selected on the basis of a detailed interview on the health of the child or adult, operations, injuries, and above all, information on the current lifestyle and eating habits.