Weighted blankets use the principle of deep pressure stimulation (DPS), a sensory technique that provides pressure to the body, akin to a firm hug or being swaddled. The science behind DPS suggests that it can stimulate the release of neurotransmitters such as serotonin and dopamine, which are mood enhancers. This can reduce cortisol levels, a stress hormone, leading to feelings of relaxation and calmness.
A notable study from Sweden found profound evidence of the efficacy of weighted blankets. In this research, a significant 92% of participants reported positive effects from using a weighted blanket, and these benefits were sustained even after 12 months. This indicates that the benefits of weighted blankets are not just a placebo effect or short-lived, but they provide lasting relief for many users.
The positive outcomes reported in the study can be attributed to several mechanisms. The pressure from the blanket can enhance proprioceptive input, which can improve body awareness and provide a grounding effect. This deep pressure also promotes a switch from the sympathetic nervous system (responsible for the "fight or flight" response) to the parasympathetic nervous system (often called the "rest and digest" system), facilitating relaxation and sleep. Thus, weighted blankets can be particularly beneficial for those with anxiety, insomnia, or sensory processing challenges.