Recent research published in JMIR mHealth and uHealth A wearable device that sends gentle vibrations to the body could help people sleep longer, a study suggests. The study results provide evidence that this non-invasive technology tends to significantly increase total sleep time, especially for people who have difficulty getting enough rest throughout the night. This approach offers a promising non-drug option for addressing chronic sleep deprivation and improving overall health.
A significant portion of the world’s population does not get enough sleep each night. Approximately 70 million adults in the United States regularly sleep 6 hours or less. Medical experts refer to this condition as chronic sleep deprivation. The Centers for Disease Control and Prevention recommends that adults get at least seven hours of sleep each night to maintain optimal physical and mental health.
Failure to meet this recommendation results in a variety of adverse health effects. Chronic sleep deprivation tends to increase the risk of cardiovascular disease, diabetes, obesity, and mood disorders. Cognitive functions such as memory consolidation and daily concentration may also be impaired. Because of these serious health risks, many people are actively looking for ways to extend their nightly rest.
Historically, people have relied on behavioral changes, cognitive behavioral therapy, or medication to improve their rest. Prescription sleeping pills are very effective at inducing sleep, but they often come with unwanted side effects such as dizziness, next-day drowsiness, and even strange behavior at night. Over-the-counter supplements, such as melatonin, offer a milder alternative, but tend to only provide a modest increase in actual sleep time. Scientists are actively investigating alternative interventions that minimize user effort and completely avoid pharmacological side effects.
One new technology is transcutaneous vibration stimulation, which applies rhythmic tactile vibrations directly to the skin. The concept is based on the idea that gentle, low-frequency sound waves can mimic the gentle sensation of soothing human touch. This type of tactile stimulation is thought to affect the autonomic nervous system, which controls involuntary bodily functions such as heart rate and digestion. This technology may help the nervous system prepare for sleep by shifting the body from a state of stress to a state of relaxation.
The authors of the new study wanted to investigate how this particular type of vibrational stimulation affects sleep patterns in the real world. Previous trials have shown this technology improves sleep in patients with certain autoimmune diseases. The researchers aimed to build on previous research by quantifying the device’s impact on a much larger general population over a longer period of time. They specifically focused on whether device use correlated with increased measurable total sleep time.
To conduct this study, researchers analyzed retrospective data from a community of individuals who used both Apollo wearable devices and Oura Ring. The Apollo device is a consumer wellness product that is worn on the wrist or ankle to deliver targeted vibrational stimulation through the skin. Oura Ring is an independent biometric tracking device that you wear on your finger and uses movement, heart rate, and temperature sensors to monitor your sleep stages. This study is based on data collected naturally between January 2019 and May 2022 as users interacted with these commercial devices in their daily lives.
The final sample included 935 users, providing an extensive dataset of 474,852 observation nights. Most participants were between the ages of 36 and 64, and approximately 52 percent of the sample identified as male. To establish a baseline for each user, the researchers required participants to record at least seven days of sleep data before using the vibrating wearable at night. The researchers then grouped participants based on their baseline sleep habits, creating specific categories for natural sleep duration of less than 6 hours, 6-7 hours, 7-8 hours, and 8-9 hours.
The researchers measured nighttime usage of the Apollo device in minutes and categorized usage into distinct levels from 0 minutes to more than 240 minutes. They then used advanced statistical frameworks, such as linear mixed-effects models, to analyze how differences in the amount of nighttime vibrations affected total sleep time. This type of statistical model allows researchers to control for individual differences, ensuring that users who log hundreds of nights don’t falsely skew their data compared to users who log fewer nights. The main outcome measured was the change in total sleep time recorded by the smart ring in minutes.
Analysis revealed that nighttime use of vibrating wearables was significantly associated with increased total sleep time. This effect is dose-dependent, meaning that more time spent on the device generally means more time spent sleeping. In a group of short sleepers who typically had six hours or less of rest, using the device for more than 240 minutes per night resulted in an average of about 46 minutes more sleep. Median total sleep time for these individuals increased from 350 to 381 minutes on nights with maximum levels of stimulation.
Participants who had already increased their baseline sleep duration also experienced a benefit, although the absolute increase was slightly smaller. For example, people who typically sleep 6 to 7 hours gained an average of 35 minutes of additional sleep when using the device for more than 240 minutes. People who slept 7 to 8 hours slept an estimated 13 minutes more. This shows that vibration stimulation provides evidence to enhance sleep across several different baseline habits.
The researchers also looked at how extra sleep was distributed among different sleep stages, including light sleep, deep sleep, and rapid eye movement sleep. Rapid eye movement (REM) is a sleep stage associated with dreams and emotional processing. For short sleepers, the data showed an approximately 6% increase in the percentage of time spent in the REM sleep stage. This increase in REM sleep came at the expense of lighter sleep, suggesting that the additional rest maintained an overall healthy sleep architecture.
In addition to increasing total sleep time, vibration stimulation was associated with decreased odds of significantly shorter nightly rest time. The authors calculated the probability that participants would get six hours or less of sleep on a given night. For short sleepers, using the device for more than 240 minutes reduced the odds of having a short night’s sleep by 77%. Moderate device use between 181 and 240 minutes also reduced these odds by 49%.
Several limitations should be considered when interpreting these results. This study uses an observational design based on retrospective data. In other words, while a correlation can be identified, it cannot be conclusively proven that the device directly caused the sleep improvement. Because the researchers analyzed existing commercial data, they could not control for external factors that may affect sleep, such as caffeine intake, alcohol intake, or daily medication use. The lack of direct interaction with participants also meant the team could not verify whether the devices were always being used exactly as intended by the manufacturer.
Reliance on biometric wearable devices poses another constraint for research teams. Although the smart ring provides a validated, objective measure of sleep stage, this study did not include subjective ratings from users. Subjective measurements, such as structured sleep quality questionnaires, help scientists understand how well-rested a person actually feels the next day. Relying purely on device data means that psychological perceptions of sleep quality remain unknown for this particular sample.
Future research should address these gaps by conducting randomized controlled trials in clinical settings. Such trials include specific supervised protocols to establish a direct causal relationship between vibrational stimulation and sleep prolongation. The scientists also propose investigating how the technology affects diverse populations, including those diagnosed with clinical sleep disorders and distinct neurological conditions. Integrating standardized sleep quality surveys into future studies will help provide a complete picture of how transcutaneous vibration stimulation affects human health.
The study, “Duration of transcutaneous vibrational stimulation with the Apollo Neuro Device and its association with increased total sleep time,” was authored by Mahender Mandala, Shilpa Krishnan, Nathanial Weathington, Michael Breus, and David Rabin.
