Costa, M.J.Marinho, D.A.Reis, Victor M.Silva, A.J.Bragada, José A.Barbosa, Tiago M.2011-02-242011-02-242010Costa, M.J.; Marinho, D.A.; Reis, V.M.; Silva, A.J.; Bragada, José A.; Barbosa, Tiago, M. (2010). Stability and prediction of 100-m breaststroke performance during the careers of elite swimmers. In XIth International Symposium for Biomechanics and Medicine in Swimming. Oslo: Norwegian School of Sports Science. p. 273-273. ISBN 978-82-502-0439-3978-82-502-0439-3http://hdl.handle.net/10198/3536The aim of this study was to track and analyze the 100-m Breaststroke performance stability throughout elite swimmer’s career. 35 Portuguese male top-50 were analyzed for seven consecutive seasons between 12 and 18 years old. Best performances were collected from ranking tables. Longitudinal assessment was performed based on two approaches: (i) mean stability was analyzed by descriptive statistics and ANOVA repeated measures for each season followed by a post-hoc test (Bonferroni test), (ii) normative stability was analyzed with self-correlation (Malina, 2001) and the Cohen’s Kappa tracking index (Landis and Koch, 1977). There was a 100-m Breaststroke performance enhancement from children to adult age. The overall career performance prediction was low. The change from 13 to 14 years can be a milestone, where the ability to predict the final swimmer’s performance level strongly increases.engStabilityPredictionTrackingBreaststrokeconference object