Man and woman putting on bicycle helmets, preparing for bike ride

NIH study finds physical activity extends life expectancy as much as 4.5 years

Leisure-time physical activity is associated with longer life expectancy, even at relatively low levels of activity and regardless of body weight, according to a study by a team of researchers led by the National Cancer Institute (NCI), part of the National Institutes of Health.  The study, which found that people who engaged in leisure-time physical