Lead Sponsor

Chinese University of Hong Kong

Age

18 - No limit years

Sex

ALL

Healthy Volunteers

No

•diagnosed hypertension (HT) from clinical records (with or without anti-hypertensive medications)
•nocturnal HT (night-time systolic blood pressure \[SBP\] during sleep ≥120 mmHg) and stage I hypertension (daytime SBP = 135-159 mmHg), as detected by 24-hour ambulatory blood pressure monitoring (ABPM)
•no change of dose and type of anti-hypertensive(s) in the prior 2 months

•patients with atrial fibrillation (these patients have greater blood pressure variability)
•daytime office systolic blood pressure (BP) ≥180 mmHg or diastolic BP ≥120 mmHg (regardless of nocturnal BP)
•patients with known obstructive sleep apnoea
•history of dementia or psychotic illnesses
•patients with end-stage malignancies
•nocturnal worker, because they will have a reverse BP pattern to other participants
•patients receiving ≥3 BP medications at maximal tolerated doses
•previous participation in structured mindfulness program(s) of ≥8 weeks or regular daily meditation practices
•reported sleep time of \<4 hours per day
•patients who do not agree to keep the same dose of anti-HT medications during the trial period
•patients receiving anti-coagulants