Exercise dose and modality for blood pressure reduction in predominantly postmenopausal women: a dose-response network meta-analysis.

TL;DR

In postmenopausal women, exercise reduced systolic blood pressure by about 6-7 mmHg at doses around 1,400 METs-min/week (roughly 150 minutes of moderate intensity weekly), with aquatic exercise showing the largest reductions in a small subset of studies.

What the study found

Researchers conducted a network meta-analysis of 74 randomized controlled trials involving 3,573 women (mean age 59.5 years) to determine which types and doses of exercise most effectively lower blood pressure during and after menopause. The analysis was deliberately conservative, calculating exercise dose only from trials that clearly reported frequency, intensity, and session duration, adjusting for actual attendance rates. This rigor meant excluding many studies with incomplete dosing data.

The core finding centers on a dose-response relationship that peaks rather than improving linearly with more exercise. Using a quadratic (curved) model, the researchers found the largest predicted reductions occurred at approximately 1,400 METs-min/week for systolic blood pressure (a reduction of 6.70 mmHg) and 1,500 METs-min/week for diastolic pressure (4.20 mmHg reduction). To put this in practical terms, 1,400 METs-min/week roughly translates to 150 minutes of moderate-intensity activity weekly, though the exact dose depends on the specific exercise modality and individual effort. Notably, the model suggested diminishing returns at higher doses, though this attenuation appeared dependent on modeling choices rather than robust evidence.

When examining specific exercise types, aquatic exercise emerged as particularly promising. At the highest observed aquatic dose of 800 METs-min/week, models predicted the largest reductions: approximately 11.63 mmHg for systolic and 7.73 mmHg for diastolic blood pressure. However, this finding carries important caveats. These estimates derived from only three intervention arms across the trial landscape, making them exploratory rather than definitive. The researchers appropriately flagged this limitation, noting that ranking exercise modalities requires more evidence than currently exists.

The analysis found no significant differences in effectiveness based on participant age, baseline blood pressure, or intervention length, suggesting that moderate-intensity exercise doses work similarly across subgroups of postmenopausal women. Certainty of evidence ranged from very low to low across outcomes, reflecting limitations in trial design, risk of bias in existing studies, and the heterogeneity of exercise protocols. Critically, 70 of 74 trials enrolled exclusively postmenopausal women, with only four including perimenopausal women. This means evidence-based guidance specifically for the perimenopausal transition remains insufficient.

What this means for you

If you are a postmenopausal woman and are considering exercise for cardiovascular health, the data suggest targeting around 150 minutes of moderate-intensity activity weekly as a starting point. This aligns with existing public health guidelines and reflects the dose at which the largest blood pressure reductions appear in this analysis. Individual variation is substantial, however, so responses should be monitored.

The finding around aquatic exercise warrants mention despite its exploratory status. If accessible to you, water-based exercise might warrant consideration, though the evidence base is currently small. Other forms of resistance training and zone 2 cardio were included in the analysis as modalities but were not ranked separately in the published results, suggesting they deserve equal consideration alongside the highlighted findings.

The dose-response plateau at higher volumes is noteworthy. Unlike some health outcomes where "more is always better," this analysis suggests diminishing returns beyond approximately 1,400-1,500 METs-min/week. This does not mean higher doses are harmful, but rather that the blood pressure benefit does not continue scaling upward indefinitely.

For perimenopausal women specifically, this study provides limited guidance. The researchers explicitly noted that evidence remains insufficient to draw stage-specific conclusions for the perimenopausal transition, when blood pressure typically begins rising. This represents a gap in the literature that future trials should address.

Study details

Sources

Frontera W, et al. "Exercise dose and modality for blood pressure reduction in predominantly postmenopausal women: a dose-response network meta-analysis." Frontiers in Medicine. 2025. PubMed: 42656352

PROSPERO registration: CRD420261354599