What is the significance of the term "PR" in sports performance measurement and how does it impact an athlete's training and competition outcomes?

The term "PR" stands for personal record in sports performance measurement. It is significant because it represents an athlete's best performance in a specific event or activity. PRs serve as benchmarks for progress and improvement, motivating athletes to push themselves further in training and competition. Achieving a new PR can boost an athlete's confidence and drive to succeed, leading to better outcomes in future competitions.