The grass root of every successful Sportsperson is the Athletic Ability one possesses.
Be it Cricket, Badminton, Tennis or any sport for that matter. The combination of skills like agility, quicksilver reaction, endurance, footwork, balance, control etc. all form the level of fitness of an athlete. On the nature and the kind of sport one is playing the training program is decided accordingly like for eg. A fitness routine of a bowler will not be the same like the batsman even though they both play Cricket.