Performing isometric wall squats just once a week can help preserve blood pressure reductions after an initial month of more frequent training, according to a clinical trial published in late October 2026 in the journal BMJ Open Sport & Exercise Medicine. Led by researchers at Canterbury Christ Church University, the eight-week study tracked 100 inactive adults to determine how exercise frequency affects cardiovascular health. While working out three times a week produced the largest improvements, stepping down to a single weekly session allowed participants to hold onto a meaningful portion of their initial gains rather than losing their progress completely.

The findings offer practical encouragement for adults who struggle to maintain a strict workout routine during busy periods. By engaging the lower body in static holds that require no gym equipment, individuals with normal to high-normal blood pressure were able to support their cardiovascular health at home. However, the trial tested the once-weekly schedule strictly as a maintenance strategy after an initial four-week build-up, rather than as a standalone starting routine.

How the Eight-Week Wall Squat Trial Worked

To evaluate how often people need to perform isometric exercises, a research team led by Harry Swift and Jim Wiles, a professor of exercise science at Canterbury Christ Church University, enrolled 100 inactive adults with an average age of about 37 years, according to ScienceDaily and ZME Science. All volunteers had baseline systolic blood pressure—the top number measuring pressure when the heart contracts—between 120 and 140 millimeters of mercury (mmHg). Under clinical guidelines, readings between 130 and 139 mmHg are classified as high-normal, a stage where healthcare providers typically recommend lifestyle adjustments. None of the participants had been clinically diagnosed with hypertension, none were taking blood pressure medications, all were nonsmokers, and all consumed no more than 14 units of alcohol per week.

Researchers randomly divided the volunteers by placing 20 into a non-exercising control group and 80 into four exercise groups. During the first four weeks, everyone in the active groups completed the exact same at-home routine three times a week. Each workout consisted of four sustained wall-squat holds separated by two minutes of seated recovery. While Fox News and Yahoo Health described the sessions as four two-minute holds monitored with heart-rate straps, ZME Science noted that researchers adjusted the difficulty of the sustained squats so participants reached individually prescribed heart-rate targets.

Isometric exercises involve contracting muscles and holding the body in a fixed position without moving the joints, unlike traditional squats or bicep curls where muscles lengthen and shorten through a range of motion. Notably, while The Independent reported that doing wall squats or planks once a week can help lower and maintain blood pressure, study protocol details reported by Verywell Health, Yahoo Health, and ZME Science confirm that the trial specifically tested lower-body isometric wall squats rather than planks.

Comparing Weekly Exercise Frequencies

At the end of the initial four-week phase, the exercising participants showed substantial cardiovascular improvements. Compared with the control group, those performing wall squats three times a week saw their systolic blood pressure drop by an average of 9.45 mmHg (about 9.5 points) and their diastolic pressure—the bottom number measuring pressure when the heart relaxes—fall by 5.47 mmHg. Mean arterial pressure, which reflects average blood pressure throughout the cardiac cycle, also declined significantly.

For the second four-week period, the researchers altered the workout schedules to test whether reduced training could sustain those initial gains. The four exercise groups were assigned to train either three, two, one, or zero times per week. By the end of week eight, a clear dose-response pattern emerged:

  • Three times weekly: Participants who maintained the full schedule achieved the greatest overall benefit. According to Verywell Health and ZME Science, their average systolic blood pressure fell from 131.2 mmHg at baseline to 117.5 mmHg at week eight—a total reduction from baseline of 13.73 mmHg (or approximately 13.7 mmHg).
  • Twice weekly: Those who scaled back to two sessions per week finished the eight-week study with an average systolic reduction of 6.95 mmHg (about 7 mmHg) from their baseline readings.
  • Once weekly: Participants who dropped down to a single weekly workout retained an average systolic reduction of 6.56 mmHg (approximately 6.6 mmHg) from their starting baseline.
  • Zero times weekly: In the group that stopped exercising altogether, blood pressure rebounded back toward starting levels within four weeks, leaving their readings statistically indistinguishable from the non-exercising control group.

While the once- and twice-weekly groups saw their blood pressure creep slightly upward during the second month compared to their four-week peak, their final numbers remained significantly lower than the control group. However, only the group that continued exercising three times a week retained key secondary cardiovascular improvements, including reductions in total peripheral resistance (the resistance blood encounters flowing through vessels), improved heart rate variability, and better reflex sensitivity, which governs how the nervous system regulates blood pressure beat by beat.

Why Modest Reductions and Flexibility Matter

Even single-digit drops in blood pressure carry meaningful weight in preventive medicine. As reported by ZME Science, previous clinical analyses have shown that lowering systolic blood pressure by just 5 mmHg through medication is associated with a 10% reduction in the risk of major cardiovascular events, including strokes and heart attacks. Prior research has also indicated that isometric training can sometimes lower blood pressure at rates comparable to certain medications, though scientists previously lacked firm data on the minimum frequency required to keep those benefits from fading.

The researchers emphasized that providing flexible options can help patients avoid abandoning fitness habits altogether when schedules tighten. "Our findings show that exercising three times a week was associated with better reductions in blood pressure and maintenance of a wider range of physiological benefits," Wiles said, as quoted by The Independent. "But even exercising just once a week can help maintain some health benefits over a short four-week period, making it a practical option for people."

Swift echoed this perspective, noting that physical activity routines do not need to be rigid to be worthwhile. "Exercise does not have to be all or nothing. Our findings show that when life gets busy, as it often does, reducing to just one isometric exercise session per week may help sustain the blood pressure benefits already achieved until a more regular routine can be resumed," Swift stated.

Outside specialists also pointed to the accessibility of the routine. Dr. Aseem Malhotra, a cardiologist and metabolic health specialist at Ovadia Heart Health in Florida, told Fox News that the research demonstrates how a small amount of targeted exercise once a week can yield cardiovascular benefits in lowering blood pressure, adding that "it also doesn't cost anything to do wall squats at home."

Frequently Asked Questions About Wall Squats and Blood Pressure

Does exercising once a week work if someone starts at that frequency?

The clinical trial did not test starting at once a week. All exercising participants first completed a four-week foundational phase of wall squats three times a week before reducing their frequency. The findings show that a single weekly session can help preserve benefits already earned, not that starting with one session per week produces the same reduction on its own.

Was this routine tested as a treatment for diagnosed hypertension?

No. The 100 participants were relatively young adults (average age about 37) with normal to high-normal systolic readings between 120 and 140 mmHg who were not taking blood pressure medications. The study does not establish that wall squats produce the same quantitative effect in older adults or those with clinically diagnosed hypertension, nor should the exercise replace prescribed medications.

How should individuals with health conditions approach isometric exercise?

While wall squats require no equipment and can be done at home by leaning the back flat against a wall and bending the knees into a static hold, they still place sustained muscular and cardiovascular demands on the body. Readers with diagnosed hypertension, joint pain, balance issues, or underlying heart conditions should consult a physician or physical therapist before starting an isometric routine to determine a safe knee angle, hold duration, and breathing technique.

Sources