A special underwear designed by scientists uses tiny pulses of electricity to stimulate the muscles and could help stop bedsores.
Sores form when people are stuck in one position for too long, which compresses the skin and cuts off the blood supply.
Canadian academics said that in a short trial on 37 people, the mild current mimicked fidgeting and prevented the sores forming.
Pressure sores are a common problem in hospitals around the world as patients are often too ill to get out of bed.
Older people are at heightened risk. Doctors at the University of Calgary tested underwear which placed two pads of electrodes on each cheek, according to the BBC.