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Sedentary behaviour and sleep quality.

Mohammad Javad Koohsari1,2, Akitomo Yasunaga3, Gavin R McCormack4,5,6,7

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Higher moderate-to-vigorous physical activity (MVPA) is linked to better sleep quality in middle-aged women. Replacing sedentary time or light physical activity with MVPA improved rest by sleep for women, but not men.

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Area of Science:

  • Sleep Science
  • Public Health
  • Exercise Physiology

Background:

  • High-quality sleep is crucial for overall health and well-being.
  • Previous research indicates physical activity benefits sleep, while sedentary behavior may harm it.
  • The interplay between different intensities of physical activity and sedentary time concerning sleep quality requires further investigation, especially in middle-aged adults.

Purpose of the Study:

  • To examine the associations between replacing sedentary time (SB) and light-intensity physical activity (LPA) with moderate-to-vigorous physical activity (MVPA) on sleep quality.
  • To investigate these relationships in a sample of middle-aged adults in Japan, considering gender differences.

Main Methods:

  • Utilized an isotemporal substitution approach with data from 683 Japanese adults (aged 40-64).
  • Objectively measured daily time spent in SB, LPA, and MVPA using accelerometers.
  • Assessed sleep quality using two self-reported measures: 'rest by sleep' and 'sleep quality', analyzed via multivariable linear regression stratified by gender.

Main Results:

  • In women, each 60-minute substitution of SB or LPA with MVPA was favorably associated with 'rest by sleep' (p < 0.001 and p < 0.05, respectively).
  • No significant associations were found between SB, LPA, and MVPA with sleep measures in men.
  • Findings suggest a gender-specific positive impact of higher MVPA on sleep quality in middle-aged women.

Conclusions:

  • Increased moderate-to-vigorous physical activity, achieved by reducing sedentary time or light activity, positively influences sleep quality in middle-aged women.
  • The study highlights the importance of considering activity intensity and gender when examining physical activity's role in sleep health.
  • Further research may explore targeted interventions promoting MVPA for sleep improvement in this demographic.