Sir Bradley Wiggins has dismissed the marginal gains process at the centre of British Cycling's success under Sir Dave Brailsford as "a load of rubbish".
Wiggins was also critical of fellow Olympic gold-medallist Victoria Pendleton and sports psychologist Dr Steve Peters, who worked with Brailsford at British Cycling and Team Sky and created the "chimp paradox" model for dealing with pressure.
Former Olympic champion Chris Boardman originally headed up British Cycling's "Secret Squirrel Club", now known as "Room X" under head of technical development Tony Purnell, to find any slight advantage through modifications to bike technology and riders' clothing.
Wiggins won eight Olympic medals, including five golds, as well as the Tour de France for Brailsford's Team Sky.
But he told the Telegraph he didn't believe Brailsford's approach yielded benefits and disagreed with Pendleton, who won sprint gold at Beijing 2008 and the keirin at London 2012 and who has credited Dr Peters as a major part of her success.