In this episode, David is joined by Dr. Franco Impellizzeri.  Franco is a Professor of Sport and Exercise Science and Medicine in the University of Technology in Sydney, Australia.  After a decade in medicine based research, Franco has returned to sports science full-time and is concerned with the standard of research and dogmas he has seen since returning to the field.  In this episode, Franco specifically argues using the acute:chronic workload ration to predict or prevent injury. Franco also discusses why the use of the worst case scenario or idea of tactical periodisation may not be efficacious.