A bit of an aside, a fascinating video [0] that reviews a recent metastudy: "how many steps per day does it take to reduce all cause mortality".

Turns out the answer is between 3000 and 7000 steps a day. This is a sample of 30,000 people between the ages of 45-80.

Get yourself and your parents moving.

[0]: https://www.youtube.com/watch?v=J6nW55kH7Do