Isometric Resistance Exercise on Accelerated Atherosclerosis in Hypertension

Background: Hypertension (HT) is the most common condition worldwide, predisposing to atherosclerotic disease. However, most HT patients have suboptimal BP control despite anti-HT medications. Isometric resistance exercise (IRE) (e.g. wall squat) may improve BP control, characterized by sustained muscle contraction with minimal change in muscle length and joint angle. Most randomized trials of IRE are short duration and their long-term effects on BP and atherosclerotic complications, particularly in the Chinese, remain unknown. Study objectives: (i) To evaluate the impact of IRE on Clinic and Ambulatory BP (AMBP) in Hong Kong Chinese. (ii) To evaluate the impact of IRE on atherogeneisis surrogates (brachial flow-mediated dilation, FMD and carotid intima-media thickness IMT). (iii) To evaluate the impact of IRE on mechanisms of BP reduction, including endothelial function FMD, carotid IMT, inflammatory parameters and arterial wall stiffness (cfPWV). Setting: Randomized samples of 200 HT patients, aged 18-75 years with systolic BP 135-160mHg while on no or stable anti-HT medications. Design: Randomized controlled IRE trial - stratified randomization with randomization block size of 4. 1. 100 patients for wall squat exercise of 14 mins each session (2 mins IRE x 4 sets, 2 mins rest in between), 3 sessions per week, for 1 year, plus advice on healthy diet and lifestyle. 2. 100 control patients (usual care) with advice on diet and healthy lifestyles and simple stretching …

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KS Woo, MBBS, MD, FACC  ·  +852 26474966  ·  kamsangwoo@cuhk.edu.hk

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