We propose that physiological and performance tests used in sport science research and professional practice should be developed following a rigorous validation process, as is done in other scientific fields, such as clinimetrics, an area of research that focuses on the quality of clinical measurement and uses methods derived from psychometrics. In this commentary, we briefly review some of the attributes that must be explored when validating a test: the conceptual model, validity, reliability, and responsiveness. Examples from the sport science literature are provided.
Impellizzeri is with the Dept. of Research and Development, Schulthess Klinik, Zürich, Switzerland, and CeBiSM, Inter-University Research Center of Bioengineering and Sport Science, Rovereto, Italy. Marcora is with the School of Sport, Health, and Exercise Sciences, Bangor University, Wales, U.K.