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Purpose <p>We investigated the impact of sleep-related breathing disorders (SRBDs) on physical activity levels in older individuals requiring care.</p> Methods <p>This prospective, observational study included 73 participants divided into two groups based on the presence or absence of SRBDs. Home-based sleep assessments were conducted using a sheet-shaped body vibrometer and a sensor embedded in a mattress or futon. The respiratory disturbance index per estimated total sleep time (RDI_eTST) was calculated, and participants with values ≥ 15 were diagnosed with SRBDs. Physical activity was measured using a wearable pedometer with a built-in 3D accelerometer. Grip strength for both hands was measured twice in a seated or standing position, and the best result was used. Multiple regression analysis with forced entry was performed to identify factors associated with physical function and sleep assessment.</p> Results <p>The daily step count was significantly lower in the SRBD group than in the non-SRBD group (1682.1 vs. 3545.4 steps/day, <i>p</i> = 0.010); this indicated that SRBD was an independent factor contributing to a decreased step count. Age was also identified as a significant factor that negatively affected step count. In contrast, grip strength and the skeletal muscle index were not significantly associated with step count. This result indicated that physical activity levels may be influenced by psychological, social, or environmental factors.</p> Conclusions <p>Screening and early detection of SRBDs are important. Moreover, a decline in physical activity with age should be prevented to maintain health in older individuals.</p>

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Home-based evaluation of sleep-related breathing disorders and physical activity in older adults requiring long-term care

  • 期刊论文

  • 发表日期：

    2026年4月24日

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  • Tsuyoshi Nishinakagawa,
  • Hiroyuki Shinden,
  • Kousaku Shimoe,
  • Akira Egashira,
  • Masatoshi Itaki,
  • Takuo Nomura

摘要

Purpose

We investigated the impact of sleep-related breathing disorders (SRBDs) on physical activity levels in older individuals requiring care.

Methods

This prospective, observational study included 73 participants divided into two groups based on the presence or absence of SRBDs. Home-based sleep assessments were conducted using a sheet-shaped body vibrometer and a sensor embedded in a mattress or futon. The respiratory disturbance index per estimated total sleep time (RDI_eTST) was calculated, and participants with values ≥ 15 were diagnosed with SRBDs. Physical activity was measured using a wearable pedometer with a built-in 3D accelerometer. Grip strength for both hands was measured twice in a seated or standing position, and the best result was used. Multiple regression analysis with forced entry was performed to identify factors associated with physical function and sleep assessment.

Results

The daily step count was significantly lower in the SRBD group than in the non-SRBD group (1682.1 vs. 3545.4 steps/day, p = 0.010); this indicated that SRBD was an independent factor contributing to a decreased step count. Age was also identified as a significant factor that negatively affected step count. In contrast, grip strength and the skeletal muscle index were not significantly associated with step count. This result indicated that physical activity levels may be influenced by psychological, social, or environmental factors.

Conclusions

Screening and early detection of SRBDs are important. Moreover, a decline in physical activity with age should be prevented to maintain health in older individuals.