Effects of a 6-week junior tennis conditioning program Wednesday, 29 October 2014 | Fisiología y entrenamiento deportivo Fernandez-Fernandez, J., Ellenbecker, T., Sanz-Rivas, D., Ulbricht, A., y Ferrauti, A. (2013). Effects of a 6-week junior tennis conditioning program on service velocity. Journal of Sports Science and Medicine,12, 232-239.