Title | Normative data and percentile curves for long-term athlete development in swimming |
Author | Born, D. P.; Lomax, I.; Rueger, E.; Romann, M. |
EHSM Authors | Romann, Michael, michael.romann@baspo.admin.ch, Rüeger, Eva, eva.rueeger@baspo.admin.ch, Born, Dennis, dennis.born@baspo.admin.ch |
Year | 2022 |
Journal | Journal of Science and Medicine in Sport |
Abstract | OBJECTIVES: To provide normative data and establish percentile curves for long-course (50m pool length) swimming events and to compare progression of race times longitudinally for the various swimming strokes and race distances. DESIGN: Descriptive approach with longitudinal tracking of performance data. METHODS: A total of 2,884,783 race results were collected from which 169,194 annual best times from early junior to elite age were extracted. To account for drop-outs during adolescence, only swimmers still competing at age of peak performance (21-26years) were included and analyzed retrospectively. Percentiles were established with z-scores around the median and the Lambda-Mu-Sigma (LMS) method applied to account for potential skewness. A two-way analysis of variance (ANOVA) with repeated measure and between-subject factor was applied to compare race times across the various events and age groups. RESULTS: Percentile curves were established based on longitudinal tracking of race times specific to sex, swimming stroke, and race distance. Comparing performance progression, race times of freestyle sprint events showed an early plateau with no further significant improvement (p>0.05) after late junior age (15-17years). However, the longer the race distance, the later the race times plateaued (p |