Buy 3, pay for 2 — use code TRIPLEUS at checkout. Martens Rainer | HamelynBuy 3 = Pay for 2 with TRIPLEUS Rainer Martens was born in 1942 and has dedicated his career to exploring the psychology of sports. He is the author of the seminal work Successful coaching, an essential reference for coaches worldwide. His bibliography includes a total of 30 works focused on sports performance and training. His texts masterfully explore the psychological aspects that influence athletic success. Martens has placed special emphasis on the development of youth sports and coaching methodology. 
