- Players must be ready both physically and mentally is not an illness. - know the rules and etiquette of the sport and should be considerate of each athlete- Drink enough water. - to warm up which is the most important exercise. The warm up is to anchor muscles to the fullest in every way. The need to use in the sport. It is then strained muscles weaken.After exercise or sport finish. It should not be overlooked cooldown loosening the heated rear sport. The heart is still beating fast Therefore, you should stop activity immediately. Can be dangerous