“…We classified the athletes' sports disciplines into four subgroups according to the predominant characteristics of exercise training: (1) skill (i.e., primarily technical activities; n = 226), including golf, table tennis, equestrian, gymnastics, shooting, fencing, karate, taekwondo, and sailing; (2) power activities (i.e., primarily isometric activities; n = 177), including weightlifting, wrestling, and short-distance running (100-200 m); (3) mixed disciplines (i.e., disciplines with alternate isometric and isotonic components; n = 339), including soccer, basketball, volleyball, handball, water polo, and tennis; and (4) endurance disciplines (e.g., primarily isotonic activities; n = 403), including rowing, canoeing, swimming, longdistance running and marathon, cycling, triathlon, and pentathlon. [25][26][27][28] The athletes were compared with a group of 154 healthy sedentary subjects. They were volunteers, selected on the basis of similar age (range, 18-40 years) and gender proportion (86 men [56%]) and were either completely sedentary or engaged in <3 hours of exercise per week, and none was involved in sports competitions.…”