Athletic performance is an expression that is distinct from many of the broader sports science concepts, such as health, fitness, or longevity. Athletic performance describes the efforts made by an athlete to attain specific performance objectives over a period of time. The natural talent or fitness of the athlete will impact the level of performance; all athletes ultimately measure performance by their own standards. Performance is usually regarded as an aggregation of individual results, such as performance over a month, or a season of competition, as opposed to a single or isolated activity. Athletic performance includes not only the assessment of a particular result, but also the concept of recovery; how quickly an athlete can return to the regular training or routine is an important performance factor, as recovery will dictate how the athlete is able to prepare for the next event. Nutrition places a vital role in the improvement of every aspect of performance.