New research highlights the importance of staying active through middle age. Published March 26 in PLOS Medicine, the study 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.
The study followed more than 11,000 Australian women born between 1946 and 1951, tracking activity and health across 15 years with surveys every three years. Rather than using a single snapshot, researchers assessed activity patterns over time and used a “target trial emulation” approach to approximate what a randomized trial might show. They adjusted for factors such as age, smoking, diet, and body weight to isolate the effect of physical activity.
Physical activity was self-reported and categorized by time spent walking, doing moderate exercise, or doing vigorous activities each week. The primary benchmark was the World Health Organization recommendation: at least 150 minutes per week of moderate-to-vigorous activity (examples include brisk walking, swimming, or tennis).
Key findings
– Women who consistently met recommended activity levels in 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 pointed toward similar protective effects but were less certain due to smaller numbers of those specific outcomes.
– Starting to meet activity recommendations later in midlife appeared beneficial compared with remaining inactive, but the clearest advantage came from being active consistently over time.
Limitations include reliance on self-reported activity and possible limited generalizability to women with health conditions that prevent regular exercise. Still, the study’s large sample and longitudinal design strengthen the evidence that sustained midlife activity supports longevity.
Expert perspectives
Jennifer Timmons, MD, a longevity physician, emphasized that maintaining muscle mass is a crucial midlife strategy. Muscle supports daily function—walking, running, bending, playing with grandchildren—and protects joints and bones. Loss of muscle begins early: many women lose about 3–5% of muscle mass per decade starting around age 30. Exercise along with adequate nutrition and protein helps preserve muscle and may lower risks for conditions including dementia.
Jamie Bovay, DPT, echoed the WHO guideline of 150 minutes of moderate-intensity exercise weekly and clarified intensity levels: moderate activity raises heart rate and breathing (you can still speak), while vigorous activity leaves you barely able to talk. He offered practical tips to make activity manageable:
– Use the 80/20 rule: aim for consistency rather than perfection.
– Try morning workouts to reduce distractions and support circadian rhythm.
– Use wearable trackers to monitor progress and stay motivated.
– Break activity into short “exercise snacks” (even 10-minute bouts add up).
– Prioritize functional fitness (e.g., getting up from the floor, carrying groceries) to preserve independence.
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 helps, but long-term consistency yields the greatest benefits.
