I suspect that diet and boxed in lifestyles play a huge role in quickening the heaviness. Decades ago I read a book by an actress who went to study them not long before I was born.

https://www.gaia.com/article/hunza-people-longevity-health-secrets

The book I read

https://www.goodreads.com/book/show/2442820.Hunza_Health_Secrets_for_Long_Life_and_Happiness

It is said that there are men there who are 100 still playing volleyball. They have no cars there, so walk to get where they go. I suspect that plays a huge role as well as I am convinced walking is a necessary component to being healthy.