Dose-Response Relationship of Physical Activity with All-Cause Mortality among Older Adults: An Umbrella Review.
Level 1 - systematic review of randomized trials
Umbrella review synthesizing systematic reviews and meta-analyses of prospective cohort and intervention studies
PubMed 37925162 · doi:10.1016/j.jamda.2023.09.028
What was done
An umbrella review was conducted to evaluate the dose-response relationship between physical activity (aerobic, muscle-strengthening, and multicomponent exercise) and all-cause and cardiovascular disease (CVD) mortality in older adults aged 60 years and older. Authors searched PubMed, CINAHL, and the Cochrane Library from January 2017 to March 2023 to update the 2018 US Physical Activity Guidelines Advisory Committee review, and also included meta-analyses cited in the 2018 US and 2020 WHO guidelines.
What was found
Across 16 included systematic reviews (10 from the updated search, 6 from US/WHO guidelines), physical activity at guideline-recommended levels (7.5 to 15.0 MET-hours/week) reduced all-cause mortality by approximately 19% to 30% and CVD mortality by 25% to 34%. Doses above current guidelines (15.0 to 22.5 MET-hours/week) achieved greater reductions: 35% to 37% for all-cause mortality and 38% to 40% for CVD mortality.
Why it matters
This review provides quantitative evidence that older adults achieve meaningful survival benefits from standard activity targets and gain additional mortality protection by exceeding current international guidelines.
Limits
The underlying primary studies are largely observational cohorts subject to residual confounding, healthy user bias, and reverse causation. The abstract does not provide exact participant counts, confidence intervals, assessment of study overlap across reviews, or safety/injury outcomes at higher activity volumes.
Cited by
- supports Population data show that 150 to 300 minutes per week of moderate aerobic exercise is associated with reduced frailty, reduced disability, and lower all-cause mortality in older adults.