Two sisters have invented the Booty Buster, a device which allows you to work the core muscles around the stomach and target cellulite in the bottom and thighs.
The device is shaped like a wok and has an unstable base, which forces the user to work their stomach muscles to maintain balance.
It also contains fixed ball-like nodules that massage the bottom area while the person is sitting on it.
Jenny Thorpe, 39, and Debbie Riseborough, 36, have had their design prototypes tested by sports scientists at the University of Portsmouth – and the early results have proved very promising.
Dr Joanna Scurr, from the university's Department of Sport and Exercise Science, said: 'The premise behind a core work-out device is that its very instability means that the muscles work harder to maintain balance.
'The Booty Buster needed significantly more muscle activity than other devices on the market for exercising core stability.'
In order to monitor the muscle activity Dr Scurr used a process called electromyography.
This records electrical impulses that are produced every time a muscle is used.
She attached small electrodes to the skin that picked up the electrical activity of the muscle underneath which were then monitored by a computer. Mrs Thorpe, who is a fitness instructor, said: 'The benefits of core-stability training are well known but almost every woman I know is bothered by cellulite.
'And so we came up with the idea of incorporating something which would work on that too.
'The booty buster works the upper and lower abdominal muscles, and the obliques. It stimulates blood flow to the bottom and thighs, keeping the connective tissue elasticated, which helps stop fat deposits.'
The sisters were able to develop their prototype only after approaching the University of Portsmouth.
As well as providing advice and expertise, the university supported their application for funding from Finance South East and helped them contact external design agency Patents & Prototypes.
The sisters are looking for backing to take the product to market. Anyone interested can contact them at jaydeeenterprises@btinternet.com