Abstract: The present invention provides a method of and a device for restraining the sleeping body of an astronaut in zero-g.The method comprises providing said sleeping body with extensive proprioceptive cues created by exercising substantial uniformly distributed adjustable pressure on the sleeping body.The device provides means intended for stressing by stretching the upper and lower sheets of a sleeping bag, in order to create said extensive proprioceptive cues, said stretching means comprising at least one inflatable and deflatable continuous tube inserted in said sleeping bag and secured to it in an appropriate way. Application to manned space flight missions.