TESCO Express staff in Kingswinford are planning to put customers through their paces while trying to raise funds for Diabetes UK in the process.
Customers will be encouraged to take a spin on exercise bikes when visiting the Moss Grove store on Saturday July 19 between 12 noon and 2pm.
At the same time, staff will be operating a charity car wash.
Team leader Callum Green said: "It's the first time we've done anything like this and we're hoping to raise as much money as we can. Customers can come in and do their shopping, while we clean their car at the same time."