Training for strength allows the muscles to become larger, thereby contracting more forcibly . Strength training will also strengthen the ligaments and tendons helping to prevent injury. Speed is made up of reaction time and movement time. Movement time is essentially inherited. Reaction time can be improved through training.
Muscular endurance is the ability to repeatedly perform an action.
Flexibility increases the range of options available controlling the range of motion of the body. Increased flexibility reduces energy required for performance and increases the range of options and tactics available. Stretching will strengthen the connections of the muscles to the joints reducing the possibility of injury. Balance is both static, standing still, and dynamic, moving balance. Balance is improved through proper repetitions of the karate actions and allows a more effectively delivery of karate techniques.