Preventive Medicine

Small proportions of vigorous activity link to markedly lower chronic disease and mortality risk

In UK Biobank, device-measured activity in 96,408 adults linked higher percentage of vigorous physical activity (VPA) to lower incidence of eight chronic diseases and mortality. Compared with 0% VPA, >4% of activity as vigorous was associated with roughly 29%–61% lower risk across outcomes, independent of total volume. Intensity showed greater preventive potential than volume for several outcomes, including immune-mediated inflammatory disease, MACE, atrial fibrillation, chronic respiratory disease, and dementia. Type 2 diabetes, MASLD, CKD, and all-cause mortality showed more balanced contributions of both intensity and volume. These results support counseling medically cleared patients to incorporate brief vigorous bouts, rather than focusing solely on accumulating moderate minutes. 1

Rising food prices in LMICs worsen child undernutrition and increase mortality

This systematic review synthesized 18 longitudinal studies across 104 low- and middle-income countries on food price increases and child outcomes. Sixteen of 18 studies linked higher food prices to adverse nutritional outcomes, including mortality, stunting, and wasting. Individual studies also reported associations with low birth weight, reduced intake of nutrient-dense foods, and lower haemoglobin levels. Some evidence suggested larger harms for urban children and for those exposed at younger ages. Authors argue that income support and structural reforms are needed to protect young children and pregnant women during price shocks. 2

Medicaid work requirements would preferentially target beneficiaries with poorer health and greater impairment

Using 2022–2023 Medical Expenditure Panel Survey data, investigators examined adults 19–64 on Medicaid who were not exempt under H.R.1 criteria. Half of beneficiaries—about 8.3 million people—worked fewer than 20 hours weekly and would be at risk of disenrollment. Those at risk reported substantially higher physical, neuropsychological, and independent living impairments than beneficiaries meeting work thresholds. Poor self-rated physical health (32.7% vs 10.9%) and poor mental health (28.2% vs 19.5%) were more common among at-risk adults. Findings suggest national work requirements would disproportionately strip coverage from sicker, functionally limited adults who may struggle to meet work rules. 3

Heat- and cold-related mortality rising fastest among less-educated US adults

National mortality data from 2010–2023 show increasing heat- and cold-related deaths among US adults ≥25 years, stratified by educational attainment. Adults with high school education or less had the highest and fastest-rising temperature-related mortality rates. In this group, heat deaths rose from 0.5 to 1.8 per 100,000, and cold deaths from 1.0 to 1.8 per 100,000. Among the most educated adults, heat mortality increased modestly, while cold-related mortality slightly declined. Patterns were consistent across sex, region, and race/ethnicity, indicating widening climate-related mortality disparities by education. 4