Sports coaching is the act of teaching the skills, rules and tactics involved in a particuliar sport to its players. This can be accomplished individually, by team, by division (ex. Defensive Coaching, Offensive Coaching, etc.) or by position (ex. reciever coach, quarterback coach, etc.) where applicable. Coaching also entails the application of sport tactics and strategies during the contest itself, and usually entails substitution of players and other such actions as needed.
Coaching is accomplished by individuals referred to "coaches" or "the coach," who usually are either individuals who have played the sport in question in the past or who have received training with regard to it.