As we age the tubing carrying the blood to our organs get less elastic, thus making it harder for them to accomodate to initial high pulse of the chamber conctraction. Instead of the arteries adapting by swelling up and than resettling after that pulse, the walls of those arteries remain stiff and the pulse has to propagate by pushing along the line.
This gets measured by taking a sample of the systolic pressure. (if a tube is narrow pressure rises, if it it widens it lowers)
The absurd advice contained in this ‘advice’ is a mere reflection of a correlation (as in NOT causation) between CVD problems and high blood pressure.
Obviously there are extremes which should be avoided, but the silly advice to lower systolic pressure to that of an 18 yr old only causes all organs to receive less fresh blood per heartbeat. As such it’s a great way to accelerate aging of those organs due to insufficient bloodflow.
As for the mention of salt reduction to lower bloodpressure… Salt intake follows a J curve. No salt is much worse than normal salt intake, too much salt is also not a good idea. No/too little Salt is unhealty
In other words yet again an observational ‘study’ drawing the wrong conclusions