Isometric hand grips can reduce BP

Aerobic exercise and strength training also achieved results, as did behavioural therapies such as biofeedback (including cognitive behavioural therapy) and transcendental meditation, although to a lesser degree.

Device-guided slow breathing (such as a belt around the thorax which generates musical tones) proved effective when performed for 15-minute sessions three to four times a week.

But four weeks of isometric hand grip exercises resulted in some of the most impressive improvements, with a 10% drop in systolic and diastolic blood pressure.