The big sports science marathon started on the basis of the National Olympic Committee. The workshop "Train wisely and stress-free" brought together leading experts from Belarus, Russia, China, Azerbaijan, Kazakhstan, Mongolia, Switzerland and other countries. The experts discussed modern methods of diagnosis and correction of athletes' psychological state during the competitive period. We also paid attention to new approaches in the control of athletes' nutrition. The third international conference dedicated to sports science will last in Minsk until 24 November.