Each sport has its own set of physical demands and training requirements:
Basketball players constantly sprint up and down the court, are required to change directions quickly and must maintain balance. For these reasons speed, balance, upper body strength and agility are necessary for success on the court.
Football at any level involves a lot of running, jumping, and fast changes in direction etc. Therefore maximum speed and acceleration, agility, muscular strength, and flexibility are extremely important.
Strength training helps baseball players increase batting speed, striking power and throwing velocity.