It’s not always easy to decide which sport to (1) t____ up. When choosing, it is important to remember that excellence in sports is the (2)____(resultant) of a number of factors. For some sports, the body shape and structure with which you are born are important. Top runners are typical (3) ex____ of individuals who have selected a sport because of their natural body type. Many other sports are more dependent on training and technique, and anyone following a well-structured and (4) app____ training programme should do well.The aim of all sports is to improve fitness and skills, and to develop training programmes that are both safe and (5) ef____. To do this properly, an understanding of the physical demands of sport is needed. All sports require a combination of strength, speed, endurance, agility and (6)____　　(flexible) to varying degrees. (7)____ is important is how these elements are combined to build up the skills of the sport in question. Other factors to be taken into (8) ac____ in a training programme are diet, (9)____(avoid) injuries, a person’s general state of health, and the nature and role of other team players.　　Bearing such considerations in mind, anyone prepared to work at it can (10) ex____ to progress to a reasonably competitive level, even though only a few people will go on to break world records.