Lead Sponsor

The University of Hong Kong

Age

50 - No limit years

Sex

ALL

Healthy Volunteers

No

•1. 50 years or older,
•2. ethnic Chinese who can communicate by Cantonese or Mandarin, and
•3. fulfill the DSM-5 criteria for chronic insomnia including difficulty in initiating sleep, maintaining sleep or non-restorative sleep, with complaints of impaired daytime functioning, sleep difficulty occurring at least three nights per week present for at least 3 months.

•1. cannot walk without assistive device (e.g., cane),
•2. somatic conditions that limit exercise participation (e.g., limb loss),
•3. regular aerobic exercise or mind-body training such as tai chi, yoga, qigong or meditation (\>3 times weekly for \>60 minutes per session),
•4. serious chronic diseases known to affect sleep (e.g., cancer and autoimmune diseases),
•5. dementia or use of anti-dementia medication,
•6. under treatment for serious diseases known to affect sleep (e.g., cancer chemotherapy),
•7. any chronic pain disorders known to affect sleep,
•8. untreated sleep disorder including obstructive sleep apnea, periodic leg movement disorder and narcolepsy (screened by questionnaire followed by polysomnographic confirmation in our Co-I's sleep lab, if needed),
•9. having current or past CBT-I,
•10. shift-worker.