In the third instalment of The Apprentice the task was to develop and market a new fitness product. The episode “Get Fit” was introduced in the new London Olympics Complex.

The task was to develop a new portable home fitness equipment product. It also had to retail at £30 ($45) and be designed, built and sold in just two days. The winning design was the Body Rocker (working title “bum ball”), which provides a new way to work the abs, and trim stomach fat.

The body rocker actually looks like it has some potential as being an effective way to workout the abdominals. Designed to focus on the stomach muscles, it is a balance board for the core muscles.

The winning team managed to sell 10,000 units to retail giant John Lewis, so they should be on the shelves soon.