The term used when an athlete achieves a personal best is a personal record (PR). This refers to the best performance an athlete has ever achieved in a specific event, setting a benchmark for future competition. A PR reflects an athlete's continual development and commitment to training. Achieving a personal record can be a significant motivational factor, as it provides recognition of their hard work and dedication. Athletes often set goals to surpass their PRs, contributing to their ongoing growth in the sport.