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Isometric exercise training lowers resting blood pressure.
Medicine and Science in Sports and Exercise
|July 1, 1992
Summary
Isometric handgrip exercise training significantly lowered resting blood pressure in two studies. This form of exercise offers a novel approach to managing hypertension through brief, intense contractions.
Area of Science:
- Exercise Physiology
- Cardiovascular Health
Background:
- Rhythmic and resistive exercise training can reduce resting blood pressure.
- Isometric exercise represents a distinct training modality along the exercise continuum.
Purpose of the Study:
- To evaluate the impact of isometric handgrip exercise training on resting blood pressure.
- To investigate if brief, sub-maximal isometric contractions can induce adaptations in blood pressure.
Main Methods:
- Study 1: 8 subjects performed 4x2-min isometric handgrip contractions at 30% maximal effort, 3x/week for 8 weeks.
- Study 2: 4 contractions at 50% maximal effort for 45s with 1-min rests, 5x/week for 5 weeks.
- Control groups in Study 1 showed no changes in blood pressure.
Main Results:
- Study 1: Significant reductions in systolic and diastolic blood pressure (12.5/14.9 mm Hg).
- Study 2: Significant reductions in systolic and diastolic blood pressure (9.5/8.9 mm Hg).
Conclusions:
- Isometric handgrip exercise training effectively lowers resting systolic and diastolic blood pressure.
- Brief, repeated isometric contractions can serve as a stimulus for blood pressure reduction.