University of Texas Health Science Center at Houston Mar 9 2026 The prevalence of physical activity among the global population has remained low for the last two decades despite a majority of countries making notable progress in developing policies that include physical activity, UTHealth Houston researchers found.  The study was published today in  Nature Health  and led by principal investigator Andrea Ramirez Varela, MD, PhD, MPH, assistant professor in the Department of Epidemiology at