A new study published March 26 in PLOS Medicine reinforces the benefit of staying active through middle age. Researchers found that women who consistently met physical activity guidelines in their 50s and 60s had about half the risk of premature death compared with women who did not.
What the study did: The analysis followed more than 11,000 Australian women born between 1946 and 1951, tracking health and activity for 15 years with surveys every three years. Instead of relying on a single snapshot, investigators examined activity patterns over time and used a “target trial emulation” method to approximate results a randomized trial might produce. They adjusted for age, smoking, diet, body weight and other factors to isolate the association with physical activity.
How activity was measured: Physical activity was self-reported and categorized by weekly time spent walking, doing moderate exercise, or doing vigorous activity. The main benchmark was the World Health Organization recommendation of at least 150 minutes per week of moderate-to-vigorous activity (examples include brisk walking, swimming, or tennis).
Main findings:
– Women who consistently met the recommended activity levels across their 50s and 60s were roughly 50% less likely to die prematurely from any cause than women who didn’t meet the guidelines.
– Results for deaths from heart disease and cancer suggested similar protective trends, though those estimates were less certain because of fewer events.
– Women who began meeting the recommendations later in midlife still appeared to gain benefit compared with remaining inactive, but the clearest advantage came from sustained activity over time.
Limitations and strengths: The study relied on self-reported activity, which can misestimate true activity levels, and its findings may not generalize to women with health conditions that prevent regular exercise. Still, the large sample size, repeated measurements, and longitudinal design strengthen the evidence that continued midlife activity supports longevity.
Expert perspectives: Jennifer Timmons, MD, a longevity physician, highlighted muscle preservation as a key midlife strategy. Muscle supports daily function—walking, bending, playing with grandchildren—and helps protect joints and bones. Many women begin losing muscle mass in adulthood, with an estimated 3–5% loss per decade starting around age 30; exercise combined with adequate nutrition and protein helps preserve muscle and may reduce risks for conditions including dementia.
Jamie Bovay, DPT, reiterated the WHO guideline and clarified intensity: moderate activity raises heart rate and breathing but still allows conversation, while vigorous activity makes talking difficult. He offered practical tips to make activity manageable:
– Use an 80/20 approach: aim for regular consistency rather than perfection.
– Try morning workouts to limit distractions and support circadian rhythms.
– Use wearable trackers to monitor progress and stay motivated.
– Break activity into short “exercise snacks” (even 10-minute bouts add up over the day).
– Prioritize functional fitness—moves that support independence, such as getting up from the floor or carrying groceries.
Bottom line: Consistent physical activity in midlife—meeting WHO recommendations whenever possible—appears to substantially lower the risk of early death and supports muscle, bone, heart, and brain health. Starting or increasing activity later in life still offers benefits, but maintaining activity over time provides the strongest association with longer survival.
