Its not even remotely true. A lot of people before the invention of modern medicine did considerable manual labour and yet died at a younger age. Bang for the b

Its not even remotely true. A lot of people before the invention of modern medicine did considerable manual labour and yet died at a younger age. Bang for the buck the most effective intervention is definitely vaccines, they are responsible for most of the longevity and the enormous reduction in childhood deaths we see today. Exercise is a mere blip in comparison to the effectiveness of vaccines and worse is a lot of the studies to do with exercise are low and very low quality because they are observational with relatively small effects leaving them prone to bias. That isn't saying exercise doesn't improve health it looks like it does, but compared to other pharmaceutical interventions its not very impressive.