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This study explores how the timing of physical activity affects older adults with long-standing sleep problems. Retired people aged 60-80 with long-lasting sleep difficulties were able to take part. It was carried out as a study without an assigned phase and has been completed.
The summary above is a plain-language rendering of the official record. The original English title is shown for reference.
Criteria are reproduced from the ClinicalTrials.gov record in the original English. Only the trial team can determine eligibility.
Inclusion Criteria: * Aged between 60 and 80 years old * Retired * Long lasting sleep problems (as assessed by a the screening questionnaire administered telephonically and by the ISI which will be filled out during the screening visit) * Access to and ability to use a smart phone (Android or Apple) Exclusion Criteria: * Currently employed or working * Extreme sleep chronotypes (measured by the Munich chronotype questionnaire) * Participation in any sort of fasting regimen (e.g. intermitted fasting or Ramadan) * Experienced recent (\<6 months) adverse life events (e.g., death of partner) * Abnormal values in glucose metabolism, thyroid, liver or kidney function, or inflammation markers that after examination of the study doctor need immediate attention of a general practitioner or specialist. * Diagnosed clinical depression * Diagnosed neurodegenerative diseases (e.g. dementia or Parkinson's disease) * Diagnosed sleep apnoea * Diagnosed restless legs syndrome * Use of beta-adrenergic blocking agents * Use of sleep medication\* * Injuries or other severe physical conditions (such as active arthrosis) that inhibits physical activity * Travelled across time zones one week prior to start of study