THE ARISING · Longevity & Healthspan
Vigorous Exercise Linked to Lower Death Rates in a Korean Study
People who reported vigorous exercise on at least one day a week were less likely to die over the follow-up period than people who reported no moderate or vigorous activity, according to a large Korean study of adults with and without lung cancer.
The work is an observational cohort study in people, published in BMC Cancer on November 6, 2026, as an accepted article by Hyunseok Jee of Yeungnam University. It used records from the Korean National Health Insurance Service. From a source cohort of 1,134,909 individuals, the researchers built a matched group of 7,296 participants: 3,648 with lung cancer and 3,648 comparison participants without cancer who had a recorded common-cold diagnosis. This comparison group was not a random sample of healthy Korean adults.
Matching was done by propensity score, a statistical method that pairs people who look alike on measured characteristics. The team then used Cox proportional hazards regression, a standard method for comparing death rates over time, to examine exercise intensity and death from any cause. They adjusted for demographic, behavioral, laboratory and comorbidity-related factors. They also compared survival curves by cancer status and exercise intensity using Kaplan– Meier analysis.
Reporting vigorous-intensity activity on at least one day per week was associated with a lower hazard of death from any cause than reporting no moderate or vigorous activity. The adjusted hazard ratio was 0.734 (95% CI 0.666–0.809; p < 0.0001). A hazard ratio below 1 means a lower rate of death in that group. Here, that works out to roughly a 27% lower hazard.
Having more other illnesses, measured by the Charlson Comorbidity Index, was also linked to a higher risk of death.
The finding speaks to a question that matters for people living with a cancer diagnosis and for those who care for them: whether the intensity of exercise, and not just whether someone moves at all, relates to survival. The paper's abstract notes that emerging evidence suggests physical activity may improve survival outcomes in lung cancer. This study adds a nationwide comparison that includes people without cancer.
The main analysis was run across the whole matched cohort rather than in people with lung cancer alone, and the author describes the results as observational associations rather than lung cancer-specific effects. Because the data did not include cancer stage, tissue type, treatment or performance status, people who were sicker may simply have been less able to exercise.
The activity categories did not measure weekly minutes or total exercise volume, so they cannot isolate an intensity effect or establish that one weekly session lowers mortality. Activity was self-reported, and the author calls for prospective studies that capture detailed cancer-specific clinical information and more comprehensive measurement of physical activity.
Source: Jee, BMC Cancer, November 6, 2026.