Competing interests
received payment for leading CPET workshops at IX Małopolskich Warsztatach Niewydolności Serca. The author has no other competing interest to declare.No competing interests declared.has received funding from the Institute of Sport - National Research Institute. The author has received consulting fees for regular coaching and consulting work with private clients, Polish Triathlon Federation and The Triathlon Squad professional triathlon team. The author has no other competing interests to declare.