Dr David Lipman is one of the more useful voices in the masters-cyclist conversation: an Australian sports physician whose central claim is that age-related decline is driven by training gaps — parenthood, career stress, injury — rather than biology itself. His framing of 'floor matters more than ceiling' and 'injury-free time is the best predictor of performance' gives amateurs a structural way to think about decade-long consistency rather than chasing peak FTP cycles separated by extended breaks.