Life expectancy much longer than 40 is a modern thing for humans though. So where would the over 40s schedule have come from? Or do you mean the schedule basically says: once you hit 50 start falling apart?
> Back in 1994 a study looked at every man entered into the Oxford Classical Dictionary who lived in ancient Greece or Rome. Their ages of death were compared to men listed in the more recent Chambers Biographical Dictionary. Of 397 ancients in total, 99 died violently by murder, suicide or in battle. Of the remaining 298, those born before 100BC lived to a median age of 72 years. Those born after 100BC lived to a median age of 66. (The authors speculate that the prevalence of dangerous lead plumbing may have led to this apparent shortening of life).
https://www.bbc.com/future/article/20181002-how-long-did-anc...
Just one source