Strength is most commonly defined as the maximal force exerted during an isolated movement. Strength is best developed though a series of progressive weight training cycles. Power is the extremely important to elite athletes. A strong athlete can squat 800lbs. A powerful athlete can do comparable weight in point two seconds.
Strength training can be a strong influence on power.
Power is what no athlete can do without. A large number of athletes make the mistake of training for strength exclusively and have no idea how to develop significant power. The application of force over time is endurance. Muscular endurance in very important for the athlete. The athlete's muscles must be able to apply force repeatedly over a period of time without fatigue.