Efficacy of Footbaths With Ginger Powder on Subjectively Perceived Quality of Sleep

Inclusion Criteria: * written informed consent * age between 18 and 70 years * self-reported insomnia symptoms Exclusion Criteria: * known organic insomnia (e.g. periodic leg movements during sleep, restless legs syndrome, sleep apnea syndrome, narcolepsy) * current intake of allopathic hypnotics * shift work * skin lesions at the lower legs or feet * known intolerance or hypersensitivity to ginger preparations * acute mental disorder * varicose vein (degree 3 or 4, classification according to Marshall), chronic venous insufficiency * pregnancy * participation in other studies * insufficient knowledge of the german language