Does exercise lower your biological age?

A groundbreaking new study suggests that regular physical activity may slow biological aging, but the evidence is far from conclusive. While researchers found a strong statistical association between higher step counts and a younger epigenetic age—measured by DNA methylation clocks like Horvath and GrimAge—this link comes from cross-sectional data that can't prove causation. The study, led by Professor Andrea Meyer from the National University of Singapore, highlights that physically active people tend to have better diets, sleep, and preventive health habits, which could be the real drivers behind their younger biological age. Still, the research points to physical activity as a powerful 'geroprotective' intervention, influencing cellular health through improved circulation, mitochondrial function, and the release of beneficial myokines. However, the episode also reveals a troubling paradox: despite the science, Australia is losing access to a critical hormone therapy (Zoladex) for breast cancer and endometriosis due to commercial decisions, raising alarms about drug pricing policies. Meanwhile, proposed changes to abortion access in multiple states threaten to criminalize care and restrict access for vulnerable women, particularly in rural areas.