However, exercises like squats, push-ups, high-intensity interval training (HIIT), and cardio are also effective, suggesting a reevaluation of existing exercise guidelines for managing blood pressure might be necessary.
Static isometric exercises, which involve engaging muscles without moving them in activities like wall sits and planks, are best for reducing blood pressure, according to a comprehensive data analysis from various clinical trials recently published in the British Journal of Sports Medicine.
However, the findings also highlight the effectiveness of other forms of exercise. These include ‘cardio,’ or aerobic exercise, dynamic resistance training techniques like squats, press-ups, and lifting weights, and high-intensity interval training (episodic short bouts of high-intensity exercise interspersed with short periods of recovery at a lower intensity), or HIIT.
It may be time to review the current exercise guidelines for the prevention and treatment of high blood pressure, suggest the researchers.
Previously published research shows that exercise in general is associated with significant reductions in blood pressure, with aerobic (’cardio’) exercise, such as walking, running, and cycling, the type primarily recommended for managing blood pressure.
But this recommendation is largely based on older data that exclude the newer forms of exercise, such as HIIT and isometric exercise, meaning that the current recommendations are probably outdated, suggest the researchers.
In a bid to potentially update information on the best form of exercise for controlling blood pressure, they trawled research databases looking for clinical trials reporting the effects of an exercise training intervention lasting 2 or more weeks on resting blood pressure.
The exercise interventions were classified as aerobic (‘cardio’); dynamic resistance training; a combination of these; HIIT; and isometric exercises.
Healthy resting blood pressure was defined as a reading below 130/85 mmHg; pre-high blood pressure as 130–139/85–89 mmHg; and high blood pressure as 140/90 mmHg or more.
Systolic blood pressure, the first number in a reading, measures arterial pressure when the heart beats; diastolic blood pressure, the second number, measures arterial pressure between beats.
In all, 270 randomized controlled trials published between 1990 and February 2023 were included in the final analysis, with a pooled data sample size of 15,827 participants.
The pooled data analysis showed significant reductions in resting systolic and diastolic blood pressure after all the various categories of exercise, but with the largest falls in both systolic and diastolic blood pressure after isometric exercise training.
The reductions in blood pressure after aerobic exercise training amounted to 4.49/ 2.53 mmHg; 4.55/3.04 mm Hg after dynamic resistance training; 6.04/2.54 mmHg after combined training; 4.08/2.50 mmHg after HIIT; and 8.24/4 mmHg after isometric exercise training.
The rank order of effectiveness values for reducing systolic blood pressure was isometric exercise training (98%), combined training (76%), dynamic resistance training (46%), aerobic exercise training (40.5%) and HIIT (39%).
Secondary analyses revealed wall squats (isometric) and running (aerobic) as the most effective individual exercises for reducing systolic blood pressure (90.5%) and diastolic blood pressure (91%), respectively, with isometric exercise, overall, the most effective for reducing both blood pressure elements.
The researchers acknowledge that variations in the types of participants included across the clinical trials and differences in statistical and methodological processes and exercise interventions may have influenced the findings, and so should be interpreted in light of these limitations.
But they nevertheless conclude: “Overall, isometric exercise training is the most effective mode in reducing both systolic and diastolic blood pressure.
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