English boyband Jack the Lad Swing's track titled 'Beat Again' has been named the best flab-fighting tune to exercise to in the gym.
Boy band's debut single was the most-played track by the UK's gym instructors during 2009.
While, Beyonci Knowles 'Sweet Dreams' came second, Dizzee Rascal's 'Holiday' landed the third spot, reports the Daily Star.
The survey was conducted by PRS, an organisation, which collects royalties for songwriters and composers.
Jack the Lad Swing or JLS were runners-up in the fifth series of ITV reality talent show The X Factor in 2008.
The group consists of Aston Merrygold, Marvin Humes, Jonathan "JB" Gill, and Oritse Williams.