article 2013 Longitudinal Study in Male Swimmers: A Hierachical Modeling of Energetics and Biomechanical Contributions for Performance Mário J. Costa, José A. Bragada, Daniel A. Marinho, Vitor P. Lopes, António J. Silva, Tiago M. Barbosa JournalJournal of Sports Science and MedicinePublication typeResearch articlePopulationmale swimmers