Sleep quantity and quality have an impact on an individual’s mood, conduct, and quality of life. Healthy sleep improves one’s health by allowing muscles and discs to recover from the day’s almost continuous load. Good sleep promotes healing, aids in the recovery of the immune, neurological, skeletal, and muscular systems, and is required for bedridden patients to recover. Sleep’s most crucial function is recovery. Data analysis reveals that subjects with a preference for right-sided lying and a lower frequency of turning had better sleep quality. The results show that the most critical influencing factors are sleeping-position preference and frequency of turning. During that time, they wore the sleeping-position monitoring device and a wristband sleep-monitoring bracelet on their left hand, and gathered the subjective sleep data using questionnaires. Subjects slept in their beds for 8 h per night for 15 nights. They performed more than 50 sleeping-position changes to ensure the accuracy of the monitoring device. The sleeping-position monitoring device was worn by 13 subjects (7 males and 6 females) without sleep disorders before the sleep experiment. Based on the changes in the output parameters of the flexible angle sensor and the six-axis motion sensor, we determined the change in the subject’s lying position, verifying and analyzing the relationship between lying position preference, turning frequency, and sleep quality in healthy subjects. The flexible wearable sleeping-position monitoring device was designed and developed using a flexible angle sensor and a six-axis motion sensor to measure the dynamic changes in body posture during sleep. The use of flexible wearable sensors to monitor the impact of sleeping position and turning frequency on sleep and to study sleep patterns can help bedridden patients heal and recover.
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