The Cancer Prevention Study–3 conducted a large accelerometry-based analysis, revealing extensive sedentary behavior and limited vigorous physical activity among U.S. adults. The study tracked 21,219 adult participants using accelerometers, with the majority being older, non-Latino White individuals. Researchers found a median sedentary time of 9.4 hours per day and a median vigorous activity of 3 minutes per day. The study aims to explore links between physical activity, sedentary time, and health outcomes. Further research will assess the long-term health impacts of varying activity levels and sedentary patterns, focusing on chronic diseases, including cancer.