A man who fraudulently claimed disability benefit won the title of Cornwall's Strongest Man while supposedly being unable to work.
Stentiford received £300 for winning the competition
Jonathan Stentiford, 35, from St Neot, won the title in August 2003 using the name John Nicholls.
The six-event competition included a challenge to lift a Mini Metro car.
Stentiford admitted a number of charges relating to dishonestly claiming up to £40,000 from the Department of Work and Pensions (DWP).
Truro Crown Court heard he had claimed income support between February 2002 and October 2003 and from January 2004 to April 2005 but did not inform the DWP he was in work.
He also pleaded guilty to failing to notify the Department that his medical condition had improved, knowing it could affect his disability allowance claims between June 2002 and October 2006.
It was during this time Stentiford won the £300 first prize in the strongman competition, which saw him hold 50lb weights at arm's length and carry gas bottles over a course.
Stentiford also admitted failing to notify Caradon District Council of a change of circumstances - that he was working - between February 2002 and October 2006, knowing it could affect his housing and council tax benefit claim.
He pleaded not guilty to a similar charge relating to Caradon District Council between January 2004 and April 2005.
Judge Graham Cottle renewed Stentiford's bail and adjourned the case for a pre-sentence report.